ICE: InstSimplify panic with `unexpected body ty: bool` when optimizing `num-traits` `hypot`

yocto wrynose

ERROR: librsvg-2.61.3-2ArchYocto do_compile: Execution of '/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/temp/run.do_compile.55012' failed with exit code 1
ERROR: Logfile of failure stored in: /work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/temp/log.do_compile.55012
Log data follows:
| DEBUG: Executing shell function do_compile
| [0/13] /work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot-native/usr/bin/meson.real --internal exe --unpickle /work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/build/meson-private/meson_exe_cargo_wrapper.py_983837ee3bfb6a7ce6e5bee49627a125d46bd754.dat
| Compiling proc-macro2 v1.0.103
| Compiling quote v1.0.41
| Compiling unicode-ident v1.0.22
| Compiling winnow v0.7.13
| Compiling toml_datetime v0.7.3
| Compiling target-lexicon v0.13.3
| Compiling smallvec v1.15.1
| Compiling heck v0.5.0
| Building [ ] 0/239: unicode-ident, target-lexic…
| Compiling serde_spanned v1.0.3
| Building [ ] 1/239: serde_spanned, target-lexic…
| Compiling pkg-config v0.3.32
| Building [ ] 2/239: target-lexicon(build.rs), w…
| Compiling version-compare v0.2.1
| Building [ ] 3/239: target-lexicon(build.rs), v…
| Building [ ] 4/239: target-lexicon(build.rs), v…
| Compiling libc v0.2.177
| Building [ ] 5/239: target-lexicon(build.rs), v…
| Building [ ] 6/239: target-lexicon(build.rs), v…
| Compiling rand_core v0.6.4
| Building [ ] 7/239: target-lexicon(build.rs), v…
| Building [ ] 8/239: target-lexicon(build.rs), v…
| Compiling siphasher v1.0.1
| Building [> ] 9/239: siphasher, target-lexicon(b…
| Compiling autocfg v1.5.0
| Building [> ] 10/239: siphasher, target-lexicon(b…
| Building [> ] 11/239: siphasher, target-lexicon(b…
| Compiling rand v0.8.5
| Building [> ] 12/239: siphasher, target-lexicon(b…
| Building [> ] 13/239: siphasher, winnow, rand, pr…
| Building [> ] 14/239: siphasher, winnow, rand, pr…
| Compiling phf_shared v0.11.3
| Building [> ] 15/239: winnow, rand, proc-macro2, …
| Building [> ] 16/239: libc(build), winnow, rand, …
| Building [> ] 17/239: winnow, rand, libc, proc-ma…
| Compiling stable_deref_trait v1.2.1
| Building [> ] 18/239: winnow, rand, libc, proc-ma…
| Compiling cfg-if v1.0.4
| Building [=> ] 19/239: winnow, rand, libc, proc-ma…
| Compiling cfg-expr v0.20.4
| Building [=> ] 20/239: winnow, rand, libc, proc-ma…
| Building [=> ] 21/239: winnow, rand, libc, proc-ma…
| Compiling num-traits v0.2.19
| Building [=> ] 22/239: num-traits(build.rs), winno…
| Building [=> ] 23/239: num-traits(build.rs), winno…
| Building [=> ] 24/239: winnow, rand, libc, proc-ma…
| Compiling equivalent v1.0.2
| Building [=> ] 25/239: equivalent, winnow, rand, l…
| Compiling hashbrown v0.16.0
| Building [=> ] 26/239: hashbrown, winnow, rand, li…
| Compiling syn v2.0.108
| Building [=> ] 27/239: hashbrown, syn, winnow, ran…
| Compiling phf_generator v0.11.3
| Building [==> ] 28/239: hashbrown, syn, winnow, lib…
| Building [==> ] 29/239: hashbrown, syn, winnow, lib…
| Compiling memchr v2.7.6
| Building [==> ] 30/239: memchr, hashbrown, syn, win…
| Compiling bitflags v2.10.0
| Building [==> ] 31/239: memchr, hashbrown, syn, win…
| Compiling serde_core v1.0.228
| Building [==> ] 32/239: memchr, hashbrown, syn, win…
| Compiling indexmap v2.12.0
| Building [==> ] 33/239: memchr, hashbrown, syn, win…
| Compiling futures-core v0.3.31
| Building [==> ] 34/239: memchr, syn, winnow, bitfla…
| Building [==> ] 35/239: serde_core(build), memchr, …
| Compiling phf_codegen v0.11.3
| Building [==> ] 36/239: serde_core(build), memchr, …
| Building [===> ] 37/239: phf_shared, memchr, syn, ph…
| Compiling slab v0.4.11
| Building [===> ] 38/239: phf_shared, memchr, syn, ph…
| Compiling pin-project-lite v0.2.16
| Building [===> ] 39/239: phf_shared, memchr, syn, pi…
| Compiling parking_lot_core v0.9.12
| Building [===> ] 40/239: phf_shared, memchr, syn, wi…
| Compiling toml_parser v1.0.4
| Building [===> ] 41/239: phf_shared, memchr, syn, to…
| Compiling new_debug_unreachable v1.0.6
| Building [===> ] 42/239: memchr, syn, toml_parser, w…
| error: internal compiler error: /rustc-dev/e408947bfd200af42db322daf0fadfe7e26d3bd1/compiler/rustc_mir_transform/src/instsimplify.rs:298:18: unexpected body ty: bool
|
|
| thread 'rustc' (55399) panicked at /rustc-dev/e408947bfd200af42db322daf0fadfe7e26d3bd1/compiler/rustc_mir_transform/src/instsimplify.rs:298:18:
| Box
| stack backtrace:
| 0: 0x7e4eb7bc3160 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h9f476eb6ac289f17
| 1: 0x7e4eb7c5297a - core::fmt::write::hf47a38ed0fb2793c
| 2: 0x7e4eb7bd7d3c -
| 3: 0x7e4eb7bbe0b2 -
| 4: 0x7e4eb7c145af -
| 5: 0x7e4eb7c1448f - std::panicking::default_hook::h200e77b2200290a9
| 6: 0x7e4eb412b434 -
| 7: 0x7e4eb7c1476e - std::panicking::panic_with_hook::hd6ad244ed9caecff
| 8: 0x7e4eb7685913 -
| 9: 0x7e4eb767f836 - std[b88e0a3e3d0e5d1d]::sys::backtrace::__rust_end_short_backtrace::<std[b88e0a3e3d0e5d1d]::panicking::begin_panic<rustc_errors[97996eae2fdbd94c]::ExplicitBug>::{closure#0}, !>
| 10: 0x7e4eb404e9ea - std[b88e0a3e3d0e5d1d]::panicking::begin_panic::<rustc_errors[97996eae2fdbd94c]::ExplicitBug>
| 11: 0x7e4eb4048f62 - <rustc_errors[97996eae2fdbd94c]::diagnostic::BugAbort as rustc_errors[97996eae2fdbd94c]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
| 12: 0x7e4eb74af3b0 -
| 13: 0x7e4eb74af3f8 -
| 14: 0x7e4eb74ad12b -
| 15: 0x7e4eb403daf5 - rustc_middle[6731899c85154449]::util:🐛:bug_fmt
| 16: 0x7e4eb4f9d9f9 - <rustc_mir_transform[7ac78d44ade7a99d]::instsimplify::InstSimplify as rustc_mir_transform[7ac78d44ade7a99d]::pass_manager::MirPass>::run_pass
| 17: 0x7e4eb5011fcc -
| 18: 0x7e4eb4ded936 -
| 19: 0x7e4eb4decafc - rustc_mir_transform[7ac78d44ade7a99d]::optimized_mir
| 20: 0x7e4eb6316802 -
| 21: 0x7e4eb63d3df0 -
| 22: 0x7e4eb6271442 - rustc_query_system[9c84c4c2139e8ba5]::query::plumbing::try_execute_query::<rustc_query_impl[66da206573e004d4]::DynamicConfig<rustc_query_system[9c84c4c2139e8ba5]::query::caches::DefIdCache<rustc_middle[6731899c85154449]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[66da206573e004d4]::plumbing::QueryCtxt, false>
| 23: 0x7e4eb645264a -
| 24: 0x7e4eb6cb108c -
| 25: 0x7e4eb3ffb16c -
| 26: 0x7e4eb6cc869e -
| 27: 0x7e4eb6cc3d41 - rustc_metadata[451ad2038521ffb2]::rmeta::encoder::encode_metadata
| 28: 0x7e4eb6d162fb - rustc_metadata[451ad2038521ffb2]::fs::encode_and_write_metadata
| 29: 0x7e4eb42b4382 -
| 30: 0x7e4eb42dc25a - <rustc_interface[3f92c29c7bade375]::queries::Linker>::codegen_and_build_linker
| 31: 0x7e4eb40e42ea -
| 32: 0x7e4eb410515e -
| 33: 0x7e4eb40d2280 -
| 34: 0x7e4eb40bbefa -
| 35: 0x7e4eb415e8cb -
| 36: 0x7e4eb41515ce -
| 37: 0x7e4eb411d9f8 -
| 38: 0x7e4eb40ecd66 -
| 39: 0x7e4eb7bee807 -
| 40: 0x7e4eb36a032c - start_thread
| 41: 0x7e4eb371bb2c - __clone3
| 42: 0x0 -
|
| note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
|
| note: rustc 1.94.1 (e408947bf 2026-03-25) (built from a source tarball) running on x86_64-unknown-linux-gnu
|
| note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -C linker=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/wrapper/target-rust-ccld -C strip=debuginfo
|
| note: some of the compiler flags provided by cargo are hidden
|
| query stack during panic:
| #0 [optimized_mir] optimizing MIR for float::<impl at /usr/src/debug/librsvg/2.61.3/sources/cargo_home/bitbake/num-traits-0.2.19/src/float.rs:1917:9: 1917:26>::hypot
| end of query stack
| Compiling serde v1.0.228
| Building [===> ] 43/239: memchr, syn, toml_parser, w…
| error: could not compile num-traits (lib)
|
| Caused by:
| process didn't exit successfully: rustc --crate-name num_traits --edition=2021 /work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/sources/cargo_home/bitbake/num-traits-0.2.19/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --cfg 'feature="default"' --cfg 'feature="i128"' --cfg 'feature="std"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("default", "i128", "libm", "std"))' -C metadata=b1980689eb5ce74d -C extra-filename=-983aaacba0a21dcd --out-dir /work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/build/target/aarch64-unknown-linux-gnu/release/deps --target aarch64-unknown-linux-gnu -C linker=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/wrapper/target-rust-ccld -C strip=debuginfo -L dependency=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/build/target/aarch64-unknown-linux-gnu/release/deps -L dependency=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/build/target/release/deps --cap-lints allow -L /work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/lib/aarch64-linux-gnu/rustlib/aarch64-unknown-linux-gnu/lib --remap-path-prefix=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3=/usr/src/debug/librsvg/2.61.3 --cfg has_total_cmp --check-cfg 'cfg(has_total_cmp)' (exit status: 101)
| warning: build failed, waiting for other jobs to finish...
| Building [===> ] 44/239: memchr, syn, toml_parser, w…
| Building [===> ] 45/239: memchr, syn, toml_parser, s…
| Building [====> ] 46/239: memchr, syn, toml_parser, s…
| Building [====> ] 47/239: memchr, syn, toml_parser, i…
| Building [====> ] 48/239: syn, toml_parser, indexmap
| Building [====> ] 49/239: syn, toml_parser
| Building [====> ] 50/239: syn
| Error: CliError { error: Some(1 job failed
|
| Stack backtrace:
| 0:
| 1:
| 2:
| 3:
| 4:
| 5:
| 6:
| 7:
| 8:
| 9:
| 10:
| 11: __libc_start_call_main
| 12: __libc_start_main@GLIBC_2.2.5
| 13: ), exit_code: 101 }
| command: ['/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot-native/usr/bin/cargo', 'cbuild', '--locked', '--prefix', '/usr', '--libdir', '/usr/lib/aarch64-linux-gnu', '--library-type', 'staticlib', '--manifest-path', '/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/sources/librsvg-2.61.3/Cargo.toml', '--target-dir', '/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/build/target', '--release', '--target', 'aarch64-unknown-linux-gnu', '--features', 'pixbuf', '-p', 'librsvg-c'], env: {}
| Traceback (most recent call last):
| File "/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/sources/librsvg-2.61.3/meson/cargo_wrapper.py", line 194, in
| subprocess.run(cargo_cmd, env=env, check=True)
| ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File "/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot-native/usr/lib/python3.14/subprocess.py", line 578, in run
| raise CalledProcessError(retcode, process.args,
| output=stdout, stderr=stderr)
| subprocess.CalledProcessError: Command '['/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot-native/usr/bin/cargo', 'cbuild', '--locked', '--prefix', '/usr', '--libdir', '/usr/lib/aarch64-linux-gnu', '--library-type', 'staticlib', '--manifest-path', '/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/sources/librsvg-2.61.3/Cargo.toml', '--target-dir', '/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/build/target', '--release', '--target', 'aarch64-unknown-linux-gnu', '--features', 'pixbuf', '-p', 'librsvg-c']' returned non-zero exit status 1.
| while executing ['/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/sources/librsvg-2.61.3/meson/cargo_wrapper.py', '--cargo', '/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot-native/usr/bin/cargo', '--manifest-path', '/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/sources/librsvg-2.61.3/Cargo.toml', '--project-build-root', '/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/build', '--prefix', '/usr', '--libdir', 'lib/aarch64-linux-gnu', '--release', '--target', 'aarch64-unknown-linux-gnu', '--command=cbuild', '--current-build-dir', 'rsvg', '--current-source-dir', '/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/sources/librsvg-2.61.3/rsvg', '--packages', 'librsvg-c', '--extension', 'a', '--pixbuf']
| [3/13] aarch64-linux-gnu-gcc -march=armv8-a+crc -mbranch-protection=standard -fstack-protector-strong -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot -Ilibrsvg-c/tests-c/api.p -Ilibrsvg-c/tests-c -I../sources/librsvg-2.61.3/librsvg-c/tests-c -Iinclude -I../sources/librsvg-2.61.3/include -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/glib-2.0 -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/lib/aarch64-linux-gnu/glib-2.0/include -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/libmount -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/blkid -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/gdk-pixbuf-2.0 -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/cairo -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/freetype2 -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/libpng16 -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/pixman-1 -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/harfbuzz -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/libxml2 -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/pango-1.0 -I/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot/usr/include/fribidi -fvisibility=hidden -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -O2 -g -ffile-prefix-map=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/sources/librsvg-2.61.3=/usr/src/debug/librsvg/2.61.3 -ffile-prefix-map=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/build=/usr/src/debug/librsvg/2.61.3 -ffile-prefix-map=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot= -ffile-prefix-map=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot-native= -pipe -pthread -DTEST_DATA_DIR=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/sources/librsvg-2.61.3/librsvg-c/tests-c -DTEST_SRC_DIR=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/build/librsvg-c/tests-c -DTOP_SRC_DIR=/work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/sources/librsvg-2.61.3 -DHAVE_PIXBUF -MD -MQ librsvg-c/tests-c/api.p/api.c.o -MF librsvg-c/tests-c/api.p/api.c.o.d -o librsvg-c/tests-c/api.p/api.c.o -c ../sources/librsvg-2.61.3/librsvg-c/tests-c/api.c
| FAILED: [code=1] rsvg/librsvg_2.a
| /work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot-native/usr/bin/meson.real --internal exe --unpickle /work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/build/meson-private/meson_exe_cargo_wrapper.py_983837ee3bfb6a7ce6e5bee49627a125d46bd754.dat
| ninja: build stopped: subcommand failed.
| INFO: autodetecting backend as ninja
| INFO: calculating backend command to run: /work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/recipe-sysroot-native/usr/bin/ninja -j 8 -v
| WARNING: exit code 1 from a shell command.
ERROR: Task (/yocto/wrynose/yocto/ArchYocto/meta/recipes-gnome/librsvg/librsvg_2.61.3.bb:do_compile) failed with exit code '1'
NOTE: Tasks Summary: Attempted 2601 tasks of which 2591 didn't need to be rerun and 1 failed.

Summary: 1 task failed:
/yocto/wrynose/yocto/ArchYocto/meta/recipes-gnome/librsvg/librsvg_2.61.3.bb:do_compile
log: /work/workspace/rootfs/yocto6/tmp/work/armv8a-linux-gnu/librsvg/2.61.3/temp/log.do_compile.55012
Summary: There was 1 ERROR message, returning a non-zero exit code.

Start with rustc_mir_transform/src/instsimplify.rs at line 298 and reproduce the logged rustc command against num-traits-0.2.19. Inspect the MIR optimization of float::::hypot in src/float.rs:1917 and determine why InstSimplify encounters a bool body. Done means the compiler no longer panics on this case and the failure is covered by an appropriate regression test.