Bug 2424796

Summary:	[ELN] "plotters" crate FTBFS on ppc64le
Product:	[Fedora] Fedora	Reporter:	Yaakov Selkowitz <yselkowi>
Component:	llvm	Assignee:	Paul Murphy <paumurph>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	urgent	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	amulhern, decathorpe, dmalcolm, fedora-llvm-team, igor.raits, jakub, jchecahi, jistone, kkleine, npopov, paumurph, rust-sig, scottt.tw, sergesanspaille, siddharth.kde, suraj.ghimire7, tbaeder, tstellar, tuliom
Target Milestone:	---	Flags:	paumurph: mirror+
Target Release:	---
Hardware:	ppc64le
OS:	Linux
Whiteboard:
Fixed In Version:	LLVM 21.1.8-2 llvm-21.1.8-3.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-01-16 16:08:59 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Yaakov Selkowitz 2025-12-23 23:51:10 UTC

rust crashes when building clap as part of librsvg2 on ELN ppc64le:

https://koji.fedoraproject.org/koji/taskinfo?taskID=140321916

   Compiling clap v4.5.45
     Running `/usr/bin/rustc --crate-name clap --edition=2021 /builddir/build/BUILD/librsvg2-2.61.0-build/librsvg-2.61.0/vendor/clap-4.5.45/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 --warn=rust_2018_idioms '--warn=clippy::zero_sized_map_values' '--warn=clippy::verbose_file_reads' --warn=unused_qualifications --warn=unused_macro_rules --warn=unused_lifetimes --warn=unsafe_op_in_unsafe_fn --warn=unreachable_pub --allow=unnameable_types '--warn=clippy::uninlined_format_args' '--warn=clippy::trait_duplication_in_bounds' '--warn=clippy::todo' '--warn=clippy::string_lit_as_bytes' '--warn=clippy::string_add_assign' '--warn=clippy::semicolon_if_nothing_returned' '--warn=clippy::self_named_module_files' '--warn=clippy::same_functions_in_if_condition' '--allow=clippy::result_large_err' '--warn=clippy::rest_pat_in_fully_bound_structs' '--warn=clippy::ref_option_ref' '--warn=clippy::redundant_feature_names' '--warn=clippy::rc_mutex' '--warn=clippy::ptr_as_ptr' '--warn=clippy::path_buf_push_overwrite' '--warn=clippy::negative_feature_names' '--warn=clippy::needless_for_each' '--allow=clippy::needless_continue' '--warn=clippy::mutex_integer' '--allow=clippy::multiple_bound_locations' '--warn=clippy::mem_forget' '--warn=clippy::macro_use_imports' '--warn=clippy::lossy_float_literal' '--warn=clippy::linkedlist' '--allow=clippy::let_and_return' '--warn=clippy::large_types_passed_by_value' '--warn=clippy::large_stack_arrays' '--warn=clippy::large_digit_groups' '--warn=clippy::invalid_upcast_comparisons' '--warn=clippy::infinite_loop' '--warn=clippy::inefficient_to_string' '--warn=clippy::inconsistent_struct_constructor' '--warn=clippy::imprecise_flops' '--warn=clippy::implicit_clone' '--allow=clippy::if_same_then_else' '--warn=clippy::from_iter_instead_of_collect' '--warn=clippy::fn_params_excessive_bools' '--warn=clippy::float_cmp_const' '--warn=clippy::flat_map_option' '--warn=clippy::filter_map_next' '--warn=clippy::fallible_impl_from' '--warn=clippy::explicit_into_iter_loop' '--warn=clippy::explicit_deref_methods' '--warn=clippy::expl_impl_clone_on_copy' '--warn=clippy::enum_glob_use' '--warn=clippy::empty_enum' '--warn=clippy::doc_markdown' '--warn=clippy::debug_assert_with_mut_call' '--warn=clippy::dbg_macro' '--warn=clippy::create_dir' '--allow=clippy::collapsible_else_if' '--warn=clippy::checked_conversions' '--allow=clippy::branches_sharing_code' '--allow=clippy::bool_assert_comparison' '--allow=clippy::blocks_in_conditions' '--allow=clippy::assigning_clones' --cfg 'feature="help"' --cfg 'feature="std"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("cargo", "color", "debug", "default", "deprecated", "derive", "env", "error-context", "help", "std", "string", "suggestions", "unicode", "unstable-derive-ui-tests", "unstable-doc", "unstable-ext", "unstable-markdown", "unstable-styles", "unstable-v5", "usage", "wrap_help"))' -C metadata=4007c6bb4f4ee9c3 -C extra-filename=-041c22e1ae97a93e --out-dir /builddir/build/BUILD/librsvg2-2.61.0-build/librsvg-2.61.0/redhat-linux-build/target/release/deps -C strip=debuginfo -L dependency=/builddir/build/BUILD/librsvg2-2.61.0-build/librsvg-2.61.0/redhat-linux-build/target/release/deps --extern clap_builder=/builddir/build/BUILD/librsvg2-2.61.0-build/librsvg-2.61.0/redhat-linux-build/target/release/deps/libclap_builder-4ed86cb5200d1fb7.rmeta --cap-lints allow -Copt-level=3 -Cdebuginfo=2 -Ccodegen-units=1 -Cstrip=none -Clink-arg=-specs=/usr/lib/rpm/redhat/redhat-package-notes`
error: rustc interrupted by SIGSEGV, printing backtrace
/lib64/librustc_driver-9a77b2735316cba2.so(+0x10007b0) [0x7fff7ea007b0]
linux-vdso64.so.1(__kernel_sigtramp_rt64+0x0) [0x7fff82fb0484]
/lib64/glibc-hwcaps/power10/libc.so.6(+0xe24c4) [0x7fff7d6e24c4]
/lib64/libLLVM.so.21.1(+0x59e0d0c) [0x7fff7b3e0d0c]
/lib64/libLLVM.so.21.1(+0x59dcee8) [0x7fff7b3dcee8]
/lib64/libLLVM.so.21.1(+0x69f6b1c) [0x7fff7c3f6b1c]
/lib64/libLLVM.so.21.1(+0x4b72ff4) [0x7fff7a572ff4]
/lib64/libLLVM.so.21.1(_ZN4llvm12SelectionDAG8LegalizeEv+0x30c) [0x7fff7a571dec]
/lib64/libLLVM.so.21.1(_ZN4llvm16SelectionDAGISel17CodeGenAndEmitDAGEv+0x7b4) [0x7fff7ab6fc94]
/lib64/libLLVM.so.21.1(_ZN4llvm16SelectionDAGISel20SelectAllBasicBlocksERKNS_8FunctionE+0xd8c) [0x7fff7a6c220c]
/lib64/libLLVM.so.21.1(_ZN4llvm16SelectionDAGISel20runOnMachineFunctionERNS_15MachineFunctionE+0x174) [0x7fff7ac71ca4]
/lib64/libLLVM.so.21.1(+0x5271ad0) [0x7fff7ac71ad0]
/lib64/libLLVM.so.21.1(_ZN4llvm22SelectionDAGISelLegacy20runOnMachineFunctionERNS_15MachineFunctionE+0x11c) [0x7fff7af854ec]
/lib64/libLLVM.so.21.1(_ZN4llvm19MachineFunctionPass13runOnFunctionERNS_8FunctionE+0x1c8) [0x7fff7ac5e308]
/lib64/libLLVM.so.21.1(_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE+0x8a0) [0x7fff7a7ac6e0]
/lib64/libLLVM.so.21.1(_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE+0x4c) [0x7fff7a7abc5c]
/lib64/libLLVM.so.21.1(_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE+0x348) [0x7fff7a7b02d8]
/lib64/libLLVM.so.21.1(_ZN4llvm6legacy11PassManager3runERNS_6ModuleE+0x1c) [0x7fff7a7aff6c]
/lib64/librustc_driver-9a77b2735316cba2.so(+0x46aff7c) [0x7fff820aff7c]
/lib64/librustc_driver-9a77b2735316cba2.so(+0x3f3e9d8) [0x7fff8193e9d8]
/lib64/librustc_driver-9a77b2735316cba2.so(+0x3f3fc10) [0x7fff8193fc10]
/lib64/librustc_driver-9a77b2735316cba2.so(+0x3f1612c) [0x7fff8191612c]
/lib64/librustc_driver-9a77b2735316cba2.so(_RINvNtNtCsct1lYG7Dt4L_3std3sys9backtrace28___rust_begin_short_backtraceNCINvXs0_CsiWT1CHBT2S0_18rustc_codegen_llvmNtB1g_18LlvmCodegenBackendNtNtNtCsjtDbXT3T7gM_17rustc_codegen_ssa6traits7backend19ExtraBackendMethods18spawn_named_threadNCINvNtNtB2k_4back5write10spawn_workB1O_E0uE0uEB1g_+0xd0) [0x7fff81912cb0]
/lib64/librustc_driver-9a77b2735316cba2.so(+0x3f230c4) [0x7fff819230c4]
/lib64/librustc_driver-9a77b2735316cba2.so(+0x464b440) [0x7fff8204b440]
/lib64/glibc-hwcaps/power10/libc.so.6(+0xae748) [0x7fff7d6ae748]
note: we would appreciate a report at https://github.com/rust-lang/rust
help: you can increase rustc's stack size by setting RUST_MIN_STACK=16777216
note: backtrace dumped due to SIGSEGV! resuming signal
error: could not compile `plotters` (lib)


Reproducible: Always

Comment 1 Fabio Valentini 2025-12-26 15:10:59 UTC

The log messages are interleaved, the issue is not in "clap" (it's just the last message that's printed), but in "plotters", see

> error: could not compile `plotters` (lib)

Comment 2 Fabio Valentini 2026-01-07 16:54:32 UTC

(Fixed bug title according to what actually happes.)

Comment 3 Paul Murphy 2026-01-14 16:05:11 UTC

This should be fixed by https://src.fedoraproject.org/rpms/llvm/pull-request/538, which should arrive with LLVM 21.1.8-2 (or newer).

Comment 4 Josh Stone 2026-01-15 19:14:45 UTC

The rawhide build is llvm-21.1.8-3.fc44, but I guess we need to wait for this to build in ELN too.

Comment 5 Yaakov Selkowitz 2026-01-16 16:08:59 UTC

Thanks, we finally got an ELN build (although a test failed on s390x which necessitated a retry, so it took a lot longer than it should have) and with that I was able to get a successful build of librsvg2:

https://koji.fedoraproject.org/koji/buildinfo?buildID=2893644

Comment 6 Fedora Update System 2026-01-20 09:56:39 UTC

FEDORA-2026-710f1e560c (llvm-21.1.8-3.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-710f1e560c

Comment 7 Fedora Update System 2026-01-21 00:52:27 UTC

FEDORA-2026-710f1e560c has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-710f1e560c`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-710f1e560c

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 8 Fedora Update System 2026-01-23 00:55:03 UTC

FEDORA-2026-710f1e560c (llvm-21.1.8-3.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.