Closed
Description
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', src/librustc_mir/transform/match_branches.rs:54:81
Code
I couldn't reduce it to a MCVE, so the whole source tree is here: https://github.com/gretchenfrage/rustc-bug-aug-15-20-1 . I hope that's useful. Clone the repo and run game/run.sh. I found this reproducibley panics on my laptop.
Meta
rustc 1.45.2 (d3fb005a3 2020-07-31)
binary: rustc
commit-hash: d3fb005a39e62501b8b0b356166e515ae24e2e54
commit-date: 2020-07-31
host: x86_64-apple-darwin
release: 1.45.2
LLVM version: 10.0
Error output
Backtrace
Compiling libc v0.2.74
Compiling autocfg v1.0.0
Compiling cfg-if v0.1.10
Compiling proc-macro2 v1.0.19
Compiling unicode-xid v0.2.1
Compiling syn v1.0.38
Compiling bitflags v1.2.1
Compiling lazy_static v1.4.0
Compiling byteorder v1.3.4
Compiling cc v1.0.58
Compiling log v0.4.11
Compiling scopeguard v1.1.0
Compiling memchr v2.3.3
Compiling foreign-types-shared v0.1.1
Compiling serde_derive v1.0.114
Compiling maybe-uninit v2.0.0
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Compiling pin-project-internal v0.4.23
Compiling block v0.1.6
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Compiling smallvec v1.4.1
Compiling rayon-core v1.7.1
Compiling proc-macro-nested v0.1.6
Compiling slab v0.4.2
Compiling proc-macro-hack v0.5.18
Compiling getrandom v0.1.14
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Compiling semver-parser v0.7.0
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Compiling nom v4.2.3
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Compiling gif v0.10.3
Compiling textwrap v0.12.1
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Compiling raw-window-handle v0.3.3
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Compiling quote v1.0.7
Compiling wgpu-types v0.5.0 (https://github.com/gfx-rs/wgpu?rev=8057acf120f9944056a6b5de6cf326f18ae7671d#8057acf1)
Compiling tracing-log v0.1.1
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Compiling rand_chacha v0.2.2
Compiling crossbeam-deque v0.7.3
Compiling gfx-memory v0.1.3 (https://github.com/gfx-rs/gfx-extras?rev=473a4cdc63463e7986707507c4a7f6a3a767e329#473a4cdc)
Compiling gfx-backend-empty v0.5.2
Compiling gfx-descriptor v0.1.0 (https://github.com/gfx-rs/gfx-extras?rev=473a4cdc63463e7986707507c4a7f6a3a767e329#473a4cdc)
Compiling chrono v0.4.13
Compiling cocoa-foundation v0.1.0
Compiling cocoa v0.20.2
Compiling core-video-sys v0.1.4
Compiling thiserror-impl v1.0.20
Compiling futures-macro v0.3.5
Compiling tracing-attributes v0.1.9
Compiling rand v0.7.3
Compiling metal v0.20.0
Compiling winit v0.22.2
Compiling thiserror v1.0.20
Compiling pin-project v0.4.23
Compiling tracing v0.1.18
Compiling naga v0.1.0 (https://github.com/gfx-rs/naga?rev=1eb637038dd15fc1dad770eca8e6943424dbc122#1eb63703)
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', src/librustc_mir/transform/match_branches.rs:54:81
stack backtrace:
0: _rust_begin_unwind
1: core::panicking::panic_fmt
2: core::panicking::panic
3: <rustc_mir::transform::match_branches::MatchBranchSimplification as rustc_mir::transform::MirPass>::run_pass
4: rustc_mir::transform::run_passes
5: rustc_mir::transform::run_optimization_passes
6: rustc_mir::transform::inner_optimized_mir
7: rustc_mir::transform::optimized_mir
8: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
9: rustc_data_structures::stack::ensure_sufficient_stack
10: rustc_query_system::query::plumbing::get_query_impl
11: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::instance_mir
12: rustc_mir::monomorphize::collector::collect_neighbours
13: rustc_mir::monomorphize::collector::collect_items_rec
14: rustc_session::utils::<impl rustc_session::session::Session>::time
15: rustc_mir::monomorphize::collector::collect_crate_mono_items
16: rustc_mir::monomorphize::partitioning::collect_and_partition_mono_items
17: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::collect_and_partition_mono_items>::compute
18: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
19: rustc_data_structures::stack::ensure_sufficient_stack
20: rustc_query_system::query::plumbing::get_query_impl
21: rustc_codegen_ssa::base::codegen_crate
22: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
23: rustc_session::utils::<impl rustc_session::session::Session>::time
24: rustc_interface::passes::QueryContext::enter
25: rustc_interface::queries::Queries::ongoing_codegen
26: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
27: rustc_span::with_source_map
28: rustc_interface::interface::create_compiler_and_run
29: rustc_span::with_session_globals
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
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 1.47.0-nightly (8e21bd063 2020-08-14) running on x86_64-apple-darwin
note: compiler flags: -C opt-level=2 -C embed-bitcode=no -C debuginfo=2 -C debug-assertions=on --crate-type lib
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [optimized_mir] optimizing MIR for `proc::validator::Validator::validate`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
error: could not compile `naga`.
To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: build failed