Rust failing to build a library doesn't raise docker.errors.BuildError

I was building a Docker image which failed due to Rust failed to compile a library. However, it didn't raise any exception.

Step 1/5 : FROM dclong/jupyterhub-jdk:latest
 ---> 9ef0236b1acc
Step 2/5 : RUN pip3 install kotlin-jupyter-kernel
 ---> Using cache
 ---> 191a653744af
Step 3/5 : RUN curl -L -o /usr/local/bin/coursier https://git.io/coursier-cli     && chmod +x /usr/local/bin/coursier     && /usr/local/bin/coursier launch almond --scala 2.12 --quiet -- --install --global
 ---> Using cache
 ---> f67e97667686
Step 4/5 : RUN npm install -g tslab     && tslab install --python=python3
 ---> Using cache
 ---> 12722d96e163
Step 5/5 : RUN apt-add-repository -y ppa:ubuntu-mozilla-security/rust-updates     && apt-get update     && apt-get install -y rustc rust-src cargo cmake     && cargo install --force evcxr_jupyter     && /root/.cargo/bin/evcxr_jupyter --install     && cp -r /root/.local/share/jupyter/kernels/rust /usr/local/share/jupyter/kernels/     && chmod -R 755 /root     && apt-get autoremove -y     && apt-get clean -y     && rm -rf /var/lib/apt/lists/*
 ---> Running in a5692914f508
Get:1 http://ppa.launchpad.net/ubuntu-mozilla-security/rust-updates/ubuntu focal InRelease [23.9 kB]
Get:2 http://security.ubuntu.com/ubuntu focal-security InRelease [109 kB]
Hit:3 http://archive.ubuntu.com/ubuntu focal InRelease
Get:4 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:5 http://ppa.launchpad.net/ubuntu-mozilla-security/rust-updates/ubuntu focal/main amd64 Packages [5,709 B]
Get:6 http://archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Fetched 353 kB in 2s (228 kB/s)
Reading package lists...
Hit:1 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:4 http://ppa.launchpad.net/ubuntu-mozilla-security/rust-updates/ubuntu focal InRelease
Get:5 http://archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Fetched 101 kB in 1s (143 kB/s)
Reading package lists...
Reading package lists...
Building dependency tree...
Reading state information...
The following additional packages will be installed:
  cmake-data gdb gdbserver libarchive13 libbabeltrace1 libc6-dbg libdw1
  libhttp-parser2.9 libjsoncpp1 librhash0 libssh2-1 libstd-rust-1.50
  libstd-rust-dev rust-gdb
Suggested packages:
  cargo-doc cmake-doc ninja-build gdb-doc lrzip rust-doc lld-11
Recommended packages:
  cargo
The following NEW packages will be installed:
  cargo cmake cmake-data gdb gdbserver libarchive13 libbabeltrace1 libc6-dbg
  libdw1 libhttp-parser2.9 libjsoncpp1 librhash0 libssh2-1 libstd-rust-1.50
  libstd-rust-dev rust-gdb rust-src rustc
0 upgraded, 18 newly installed, 0 to remove and 8 not upgraded.
Need to get 110 MB of archives.
After this operation, 614 MB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu focal/main amd64 cmake-data all 3.16.3-1ubuntu1 [1,612 kB]
Get:2 http://ppa.launchpad.net/ubuntu-mozilla-security/rust-updates/ubuntu focal/main amd64 libstd-rust-1.50 amd64 1.50.0+dfsg1+llvm-0ubuntu5~20.04.1 [40.1 MB]
Get:3 http://archive.ubuntu.com/ubuntu focal/main amd64 libarchive13 amd64 3.4.0-2ubuntu1 [327 kB]
Get:4 http://archive.ubuntu.com/ubuntu focal/main amd64 libjsoncpp1 amd64 1.7.4-3.1ubuntu2 [75.6 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal/main amd64 librhash0 amd64 1.3.9-1 [113 kB]
Get:6 http://archive.ubuntu.com/ubuntu focal/main amd64 cmake amd64 3.16.3-1ubuntu1 [3,669 kB]
Get:7 http://archive.ubuntu.com/ubuntu focal/main amd64 libdw1 amd64 0.176-1.1build1 [226 kB]
Get:8 http://archive.ubuntu.com/ubuntu focal/main amd64 libbabeltrace1 amd64 1.5.8-1build1 [156 kB]
Get:9 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 gdb amd64 9.2-0ubuntu1~20.04 [3,221 kB]
Get:10 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 gdbserver amd64 9.2-0ubuntu1~20.04 [222 kB]
Get:11 http://archive.ubuntu.com/ubuntu focal/universe amd64 libhttp-parser2.9 amd64 2.9.2-2 [21.8 kB]
Get:12 http://archive.ubuntu.com/ubuntu focal/universe amd64 libssh2-1 amd64 1.8.0-2.1build1 [75.4 kB]
Get:13 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64 cargo amd64 0.47.0-1~exp1ubuntu1~20.04.1 [3,147 kB]
Get:14 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libc6-dbg amd64 2.31-0ubuntu9.2 [10.5 MB]
Get:15 http://ppa.launchpad.net/ubuntu-mozilla-security/rust-updates/ubuntu focal/main amd64 libstd-rust-dev amd64 1.50.0+dfsg1+llvm-0ubuntu5~20.04.1 [31.9 MB]
Get:16 http://ppa.launchpad.net/ubuntu-mozilla-security/rust-updates/ubuntu focal/main amd64 rust-gdb all 1.50.0+dfsg1+llvm-0ubuntu5~20.04.1 [28.3 kB]
Get:17 http://ppa.launchpad.net/ubuntu-mozilla-security/rust-updates/ubuntu focal/main amd64 rust-src all 1.50.0+dfsg1+llvm-0ubuntu5~20.04.1 [12.5 MB]
Get:18 http://ppa.launchpad.net/ubuntu-mozilla-security/rust-updates/ubuntu focal/main amd64 rustc amd64 1.50.0+dfsg1+llvm-0ubuntu5~20.04.1 [2,238 kB]
debconf: delaying package configuration, since apt-utils is not installed
Fetched 110 MB in 15s (7,554 kB/s)
Selecting previously unselected package cmake-data.
(Reading database ... 47878 files and directories currently installed.)
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Unpacking cmake-data (3.16.3-1ubuntu1) ...
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Unpacking librhash0:amd64 (1.3.9-1) ...
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Unpacking cmake (3.16.3-1ubuntu1) ...
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Unpacking libc6-dbg:amd64 (2.31-0ubuntu9.2) ...
Setting up libdw1:amd64 (0.176-1.1build1) ...
Setting up libstd-rust-1.50:amd64 (1.50.0+dfsg1+llvm-0ubuntu5~20.04.1) ...
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Setting up libstd-rust-dev:amd64 (1.50.0+dfsg1+llvm-0ubuntu5~20.04.1) ...
Setting up rust-src (1.50.0+dfsg1+llvm-0ubuntu5~20.04.1) ...
Setting up libbabeltrace1:amd64 (1.5.8-1build1) ...
Setting up rustc (1.50.0+dfsg1+llvm-0ubuntu5~20.04.1) ...
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Setting up gdbserver (9.2-0ubuntu1~20.04) ...
Setting up libssh2-1:amd64 (1.8.0-2.1build1) ...
Setting up cmake-data (3.16.3-1ubuntu1) ...
Setting up libhttp-parser2.9:amd64 (2.9.2-2) ...
Setting up libjsoncpp1:amd64 (1.7.4-3.1ubuntu2) ...
Setting up cargo (0.47.0-1~exp1ubuntu1~20.04.1) ...
Setting up gdb (9.2-0ubuntu1~20.04) ...
Setting up cmake (3.16.3-1ubuntu1) ...
Setting up rust-gdb (1.50.0+dfsg1+llvm-0ubuntu5~20.04.1) ...
Processing triggers for libc-bin (2.31-0ubuntu9.2) ...
Processing triggers for man-db (2.9.1-1) ...
    Updating crates.io index
 Downloading crates ...
  Downloaded evcxr_jupyter v0.9.0
  Installing evcxr_jupyter v0.9.0
 Downloading crates ...
  Downloaded dirs-sys v0.3.5
  Downloaded dirs v3.0.1
  Downloaded ena v0.14.0
  Downloaded error-chain v0.10.0
  Downloaded either v1.6.1
  Downloaded crypto-mac v0.10.0
  Downloaded digest v0.9.0
  Downloaded addr2line v0.14.1
  Downloaded drop_bomb v0.1.5
  Downloaded evcxr_input v1.0.0
  Downloaded evcxr v0.9.0
  Downloaded inotify-sys v0.1.5
  Downloaded home v0.5.3
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  Downloaded metadeps v1.1.2
  Downloaded perf-event v0.4.6
  Downloaded pulldown-cmark v0.8.0
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  Downloaded heck v0.3.2
  Downloaded indexmap v1.6.2
  Downloaded fixedbitset v0.2.0
  Downloaded itoa v0.4.7
  Downloaded itertools v0.10.0
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  Downloaded num_cpus v1.13.0
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  Downloaded pest v2.1.3
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  Downloaded num-traits v0.2.14
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  Downloaded memchr v2.3.4
  Downloaded petgraph v0.5.1
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  Downloaded ra_ap_ide_completion v0.0.45
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  Downloaded rand v0.8.3
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  Downloaded colored v2.0.0
  Downloaded rustc-ap-rustc_lexer v710.0.0
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  Downloaded snap v1.0.4
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  Downloaded cmake v0.1.45
  Downloaded chalk-solve v0.60.0
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  Downloaded quote v1.0.9
  Downloaded matchers v0.0.1
  Downloaded arrayvec v0.6.1
  Downloaded anymap v0.12.1
  Downloaded always-assert v0.1.2
  Downloaded ra_ap_text_edit v0.0.45
  Downloaded ra_ap_test_utils v0.0.45
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  Downloaded ra_ap_ide_assists v0.0.45
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  Downloaded notify v5.0.0-pre.7
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  Downloaded lock_api v0.4.3
  Downloaded json v0.12.4
   Compiling libc v0.2.93
   Compiling cfg-if v1.0.0
   Compiling autocfg v1.0.1
   Compiling unicode-xid v0.2.1
   Compiling proc-macro2 v1.0.26
   Compiling syn v1.0.69
   Compiling lazy_static v1.4.0
   Compiling log v0.4.14
   Compiling serde_derive v1.0.125
   Compiling serde v1.0.125
   Compiling rustc-hash v1.1.0
   Compiling once_cell v1.7.2
   Compiling smallvec v1.6.1
   Compiling hashbrown v0.9.1
   Compiling either v1.6.1
   Compiling scopeguard v1.1.0
   Compiling bitflags v1.2.1
   Compiling ryu v1.0.5
   Compiling text-size v1.1.0
   Compiling serde_json v1.0.64
   Compiling fst v0.4.5
   Compiling ra_ap_la-arena v0.0.45
   Compiling unicode-segmentation v1.7.1
   Compiling itoa v0.4.7
   Compiling drop_bomb v0.1.5
   Compiling regex-syntax v0.6.23
   Compiling arrayvec v0.6.1
error[E0658]: const generics are unstable
  --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:42:30
   |
42 | pub struct ArrayVec<T, const CAP: usize> {
   |                              ^^^
   |
   = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
  --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:48:15
   |
48 | impl<T, const CAP: usize> Drop for ArrayVec<T, CAP> {
   |               ^^^
   |
   = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
  --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:63:15
   |
63 | impl<T, const CAP: usize> ArrayVec<T, CAP> {
   |               ^^^
   |
   = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:616:15
    |
616 | impl<T, const CAP: usize> ArrayVecImpl for ArrayVec<T, CAP> {
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:636:15
    |
636 | impl<T, const CAP: usize> Deref for ArrayVec<T, CAP> {
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:644:15
    |
644 | impl<T, const CAP: usize> DerefMut for ArrayVec<T, CAP> {
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:661:15
    |
661 | impl<T, const CAP: usize> From<[T; CAP]> for ArrayVec<T, CAP> {
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:686:15
    |
686 | impl<T, const CAP: usize> std::convert::TryFrom<&[T]> for ArrayVec<T, CAP>
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:714:23
    |
714 | impl<'a, T: 'a, const CAP: usize> IntoIterator for &'a ArrayVec<T, CAP> {
    |                       ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:731:23
    |
731 | impl<'a, T: 'a, const CAP: usize> IntoIterator for &'a mut ArrayVec<T, CAP> {
    |                       ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:748:15
    |
748 | impl<T, const CAP: usize> IntoIterator for ArrayVec<T, CAP> {
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:758:30
    |
758 | pub struct IntoIter<T, const CAP: usize> {
    |                              ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:763:15
    |
763 | impl<T, const CAP: usize> Iterator for IntoIter<T, CAP> {
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:784:15
    |
784 | impl<T, const CAP: usize> DoubleEndedIterator for IntoIter<T, CAP> {
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:798:15
    |
798 | impl<T, const CAP: usize> ExactSizeIterator for IntoIter<T, CAP> { }
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:800:15
    |
800 | impl<T, const CAP: usize> Drop for IntoIter<T, CAP> {
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:815:15
    |
815 | impl<T, const CAP: usize> Clone for IntoIter<T, CAP>
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:825:15
    |
825 | impl<T, const CAP: usize> fmt::Debug for IntoIter<T, CAP>
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:837:35
    |
837 | pub struct Drain<'a, T: 'a, const CAP: usize> {
    |                                   ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:847:32
    |
847 | unsafe impl<'a, T: Sync, const CAP: usize> Sync for Drain<'a, T, CAP> {}
    |                                ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:848:32
    |
848 | unsafe impl<'a, T: Send, const CAP: usize> Send for Drain<'a, T, CAP> {}
    |                                ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:850:23
    |
850 | impl<'a, T: 'a, const CAP: usize> Iterator for Drain<'a, T, CAP> {
    |                       ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:866:23
    |
866 | impl<'a, T: 'a, const CAP: usize> DoubleEndedIterator for Drain<'a, T, CAP>
    |                       ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:877:23
    |
877 | impl<'a, T: 'a, const CAP: usize> ExactSizeIterator for Drain<'a, T, CAP> {}
    |                       ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:879:23
    |
879 | impl<'a, T: 'a, const CAP: usize> Drop for Drain<'a, T, CAP> {
    |                       ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:922:15
    |
922 | impl<T, const CAP: usize> Extend<T> for ArrayVec<T, CAP> {
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:939:15
    |
939 | impl<T, const CAP: usize> ArrayVec<T, CAP> {
    |               ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:946:52
    |
946 |     pub(crate) unsafe fn extend_from_iter<I, const CHECK: bool>(&mut self, iterable: I)
    |                                                    ^^^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1005:15
     |
1005 | impl<T, const CAP: usize> iter::FromIterator<T> for ArrayVec<T, CAP> {
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1016:15
     |
1016 | impl<T, const CAP: usize> Clone for ArrayVec<T, CAP>
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1040:15
     |
1040 | impl<T, const CAP: usize> Hash for ArrayVec<T, CAP>
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1048:15
     |
1048 | impl<T, const CAP: usize> PartialEq for ArrayVec<T, CAP>
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1056:15
     |
1056 | impl<T, const CAP: usize> PartialEq<[T]> for ArrayVec<T, CAP>
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1064:15
     |
1064 | impl<T, const CAP: usize> Eq for ArrayVec<T, CAP> where T: Eq { }
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1066:15
     |
1066 | impl<T, const CAP: usize> Borrow<[T]> for ArrayVec<T, CAP> {
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1070:15
     |
1070 | impl<T, const CAP: usize> BorrowMut<[T]> for ArrayVec<T, CAP> {
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1074:15
     |
1074 | impl<T, const CAP: usize> AsRef<[T]> for ArrayVec<T, CAP> {
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1078:15
     |
1078 | impl<T, const CAP: usize> AsMut<[T]> for ArrayVec<T, CAP> {
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1082:15
     |
1082 | impl<T, const CAP: usize> fmt::Debug for ArrayVec<T, CAP> where T: fmt::Debug {
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1086:15
     |
1086 | impl<T, const CAP: usize> Default for ArrayVec<T, CAP> {
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1093:15
     |
1093 | impl<T, const CAP: usize> PartialOrd for ArrayVec<T, CAP> where T: PartialOrd {
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1115:15
     |
1115 | impl<T, const CAP: usize> Ord for ArrayVec<T, CAP> where T: Ord {
     |               ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
    --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/arrayvec.rs:1125:12
     |
1125 | impl<const CAP: usize> io::Write for ArrayVec<u8, CAP> {
     |            ^^^
     |
     = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
  --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:34:30
   |
34 | pub struct ArrayString<const CAP: usize> {
   |                              ^^^
   |
   = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
  --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:40:12
   |
40 | impl<const CAP: usize> Default for ArrayString<CAP>
   |            ^^^
   |
   = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
  --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:48:12
   |
48 | impl<const CAP: usize> ArrayString<CAP>
   |            ^^^
   |
   = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:366:12
    |
366 | impl<const CAP: usize> Deref for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:378:12
    |
378 | impl<const CAP: usize> DerefMut for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:390:12
    |
390 | impl<const CAP: usize> PartialEq for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:397:12
    |
397 | impl<const CAP: usize> PartialEq<str> for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:404:12
    |
404 | impl<const CAP: usize> PartialEq<ArrayString<CAP>> for str
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:411:12
    |
411 | impl<const CAP: usize> Eq for ArrayString<CAP> 
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:414:12
    |
414 | impl<const CAP: usize> Hash for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:421:12
    |
421 | impl<const CAP: usize> Borrow<str> for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:426:12
    |
426 | impl<const CAP: usize> AsRef<str> for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:431:12
    |
431 | impl<const CAP: usize> fmt::Debug for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:436:12
    |
436 | impl<const CAP: usize> fmt::Display for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:442:12
    |
442 | impl<const CAP: usize> fmt::Write for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:453:12
    |
453 | impl<const CAP: usize> Clone for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:465:12
    |
465 | impl<const CAP: usize> PartialOrd for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:476:12
    |
476 | impl<const CAP: usize> PartialOrd<str> for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:487:12
    |
487 | impl<const CAP: usize> PartialOrd<ArrayString<CAP>> for str
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:498:12
    |
498 | impl<const CAP: usize> Ord for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:505:12
    |
505 | impl<const CAP: usize> FromStr for ArrayString<CAP>
    |            ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:563:16
    |
563 | impl<'a, const CAP: usize> TryFrom<&'a str> for ArrayString<CAP>
    |                ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/array_string.rs:574:16
    |
574 | impl<'a, const CAP: usize> TryFrom<fmt::Arguments<'a>> for ArrayString<CAP>
    |                ^^^
    |
    = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
 --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/utils.rs:4:44
  |
4 | pub(crate) struct MakeMaybeUninit<T, const N: usize>(PhantomData<fn() -> T>);
  |                                            ^
  |
  = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error[E0658]: const generics are unstable
 --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.6.1/src/utils.rs:6:15
  |
6 | impl<T, const N: usize> MakeMaybeUninit<T, N> {
  |               ^
  |
  = note: see issue #74878 <https://github.com/rust-lang/rust/issues/74878> for more information

error: aborting due to 68 previous errors

For more information about this error, try `rustc --explain E0658`.
error: could not compile `arrayvec`.

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: failed to compile `evcxr_jupyter v0.9.0`, intermediate artifacts can be found at `/tmp/cargo-installU8PT5O`

Caused by:
  build failed

Start from the Docker Python library's build entry point and the docker.errors.BuildError behavior while reproducing the reported image build with a Rust compilation failure. Done means the failed build is surfaced as a docker.errors.BuildError rather than completing without an exception.