Segfault in rustc while building slint application

Got a segfault in rustc while building slint:

❯ ls
Cargo.lock  Cargo.toml  icons  slintfiles  src  target

slinttuto on  master [?] is 📦 v0.1.0 via 🦀 v1.77.0
❯ cargo build --example circles
   Compiling proc-macro2 v1.0.79
   Compiling unicode-ident v1.0.12
   Compiling autocfg v1.1.0
   Compiling cfg-if v1.0.0
   Compiling libc v0.2.153
   Compiling portable-atomic v1.6.0
   Compiling critical-section v1.1.2
   Compiling log v0.4.21
   Compiling memchr v2.7.1
   Compiling pin-project-lite v0.2.13
   Compiling version_check v0.9.4
   Compiling bitflags v2.5.0
   Compiling libloading v0.8.3
   Compiling cc v1.0.90
   Compiling smallvec v1.13.2
   Compiling bitflags v1.3.2
   Compiling pkg-config v0.3.30
   Compiling syn v1.0.109
   Compiling libm v0.2.8
   Compiling hashbrown v0.14.3
   Compiling arrayvec v0.7.4
   Compiling rustix v0.38.32
   Compiling slab v0.4.9
   Compiling linux-raw-sys v0.4.13
   Compiling equivalent v1.0.1
   Compiling crossbeam-utils v0.8.19
   Compiling aho-corasick v1.1.3
   Compiling toml_datetime v0.6.5
   Compiling winnow v0.5.40
   Compiling wayland-sys v0.31.1
   Compiling quote v1.0.35
   Compiling indexmap v2.2.6
   Compiling syn v2.0.55
   Compiling once_cell v1.19.0
   Compiling tracing-core v0.1.32
   Compiling dlib v0.5.2
   Compiling parking v2.2.0
   Compiling regex-syntax v0.8.2
   Compiling concurrent-queue v2.4.0
   Compiling futures-core v0.3.30
   Compiling byteorder v1.5.0
   Compiling ttf-parser v0.20.0
   Compiling wayland-backend v0.3.3
error: rustc interrupted by SIGSEGV, printing backtrace

/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x2bcd196)[0x7f3682bcd196]
/lib64/libc.so.6(+0x3e9a0)[0x7f3685bb09a0]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4005128)[0x7f3684005128]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4004cba)[0x7f3684004cba]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(_RNvXs4_NtNtCsfeS9XuWYwKa_12rustc_middle3hir3mapNtB5_
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x40f6514)[0x7f36840f6514]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x40f6514)[0x7f36840f6514]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x40f6514)[0x7f36840f6514]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(_RNvNtNtCsfeS9XuWYwKa_12rustc_middle3hir3map15hir_cra
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4913814)[0x7f3684913814]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4b11365)[0x7f3684b11365]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4b117e0)[0x7f3684b117e0]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(_RNvNtCseAUOUBQ7ni4_15rustc_interface16proc_macro_dec
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x3e7f7d7)[0x7f3683e7f7d7]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4b0fdf6)[0x7f3684b0fdf6]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4b0fc3b)[0x7f3684b0fc3b]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(_RNvNtCseAUOUBQ7ni4_15rustc_interface6passes8analysis
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x47c8ddf)[0x7f36847c8ddf]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4827034)[0x7f3684827034]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4826e79)[0x7f3684826e79]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4aea78b)[0x7f3684aea78b]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4d382f1)[0x7f3684d382f1]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-37c42b3bb693526e.so(+0x4d3814f)[0x7f3684d3814f]
/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/libstd-320ebc7037fb8f95.so(rust_metadata_std_c78d3cd131ec7074+0xbf675)[0x7f3685e38675]
/lib64/libc.so.6(+0x8e897)[0x7f3685c00897]
/lib64/libc.so.6(+0x115a5c)[0x7f3685c87a5c]

note: we would appreciate a report at https://github.com/rust-lang/rust
note: backtrace dumped due to SIGSEGV! resuming signal
   Compiling getrandom v0.2.12
   Compiling scoped-tls v1.0.1
   Compiling simd-adler32 v0.3.7
   Compiling semver v1.0.22
   Compiling crc32fast v1.4.0
   Compiling downcast-rs v1.2.0
   Compiling memmap2 v0.9.4
   Compiling quick-xml v0.31.0
   Compiling typenum v1.17.0
   Compiling adler v1.0.2
   Compiling thiserror v1.0.58
   Compiling miniz_oxide v0.7.2
   Compiling num-traits v0.2.18
   Compiling memoffset v0.7.1
   Compiling generic-array v0.14.7
   Compiling futures-io v0.3.30
   Compiling wayland-scanner v0.31.1
   Compiling flate2 v1.0.28
   Compiling toml_edit v0.19.15
error: could not compile `syn` (lib)

Caused by:
  process didn't exit successfully: `/home/jgardona/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc --crate-name syn --edition=2018 /home/jgardona/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-1.0.109/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=159 --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=d0521ca06a504621 -C extra-filename=-d0521ca06a504621 --out-dir /home/jgardona/Workspace/rust/slinttuto/target/debug/deps -L dependency=/home/jgardona/Workspace/rust/slinttuto/target/debug/deps --extern proc_macro2=/home/jgardona/Workspace/rust/slinttuto/target/debug/deps/libproc_macro2-f0a5d5e14a871264.rmeta --extern quote=/home/jgardona/Workspace/rust/slinttuto/target/debug/deps/libquote-cda13238c124e7c8.rmeta --extern unicode_ident=/home/jgardona/Workspace/rust/slinttuto/target/debug/deps/libunicode_ident-771db5337abf6923.rmeta --cap-lints allow --cfg syn_disable_nightly_tests` (signal: 11, SIGSEGV: invalid memory reference)
warning: build failed, waiting for other jobs to finish...

Version

rustc 1.77.0 (aedd173a2 2024-03-17)
binary: rustc
commit-hash: aedd173a2c086e558c2b66d3743b344f977621a7
commit-date: 2024-03-17
host: x86_64-unknown-linux-gnu
release: 1.77.0
LLVM version: 17.0.6

System

Linux fedora 6.7.10-200.fc39.x86_64 #1 SMP PREEMPT_DYNAMIC Mon Mar 18 18:56:52 UTC 2024 x86_64 GNU/Linux

Start by reproducing cargo build --example circles with rustc 1.77.0 on the reported Fedora system, using the project’s Cargo.toml and src inputs. Confirm whether the SIGSEGV in syn and rustc is reproducible, then reduce the slint application to a minimal compiler test. Done means a minimal reproducer and a confirmed compiler resolution or clearly documented affected configuration.