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ice: `Field projection applied to a type other than Adt or Tuple` with `-Wrust-2021-incompatible-closure-captures` #119382

Open matthiaskrgr opened 10 months ago

matthiaskrgr commented 10 months ago

snippet:

struct V(&mut i32);

fn nested(v: &V) {
    || {
        V(_somename) = v;
        v.0 = 0;
    };
}

Version information

rustc 1.77.0-nightly (f4d794ea0 2023-12-28)
binary: rustc
commit-hash: f4d794ea0b845413344621d89f6c945062748485
commit-date: 2023-12-28
host: x86_64-unknown-linux-gnu
release: 1.77.0-nightly
LLVM version: 17.0.6

Command: /home/matthias/.rustup/toolchains/master/bin/rustc -Wrust-2021-incompatible-closure-captures

Program output

``` error[E0106]: missing lifetime specifier --> /tmp/icemaker_global_tempdir.dEdA4AEPEHqR/rustc_testrunner_tmpdir_reporting.G0gtnm9XDA0t/mvce.rs:1:10 | 1 | struct V(&mut i32); | ^ expected named lifetime parameter | help: consider introducing a named lifetime parameter | 1 | struct V<'a>(&'a mut i32); | ++++ ++ error[E0425]: cannot find value `_somename` in this scope --> /tmp/icemaker_global_tempdir.dEdA4AEPEHqR/rustc_testrunner_tmpdir_reporting.G0gtnm9XDA0t/mvce.rs:5:11 | 5 | V(_somename) = v; | ^^^^^^^^^ not found in this scope error[E0601]: `main` function not found in crate `mvce` --> /tmp/icemaker_global_tempdir.dEdA4AEPEHqR/rustc_testrunner_tmpdir_reporting.G0gtnm9XDA0t/mvce.rs:8:2 | 8 | } | ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.dEdA4AEPEHqR/rustc_testrunner_tmpdir_reporting.G0gtnm9XDA0t/mvce.rs` error[E0308]: mismatched types --> /tmp/icemaker_global_tempdir.dEdA4AEPEHqR/rustc_testrunner_tmpdir_reporting.G0gtnm9XDA0t/mvce.rs:5:9 | 5 | V(_somename) = v; | ^^^^^^^^^^^^ - this expression has type `&V` | | | expected `&V`, found `V` error[E0308]: mismatched types --> /tmp/icemaker_global_tempdir.dEdA4AEPEHqR/rustc_testrunner_tmpdir_reporting.G0gtnm9XDA0t/mvce.rs:6:15 | 6 | v.0 = 0; | --- ^ expected `&mut i32`, found integer | | | expected due to the type of this binding | help: consider dereferencing here to assign to the mutably borrowed value | 6 | *v.0 = 0; | + error: internal compiler error: compiler/rustc_middle/src/ty/closure.rs:322:21: Field projection applied to a type other than Adt or Tuple: &ReLateParam(DefId(0:6 ~ mvce[7610]::nested), BrNamed(DefId(0:8 ~ mvce[7610]::nested::'_), '_)) V. thread 'rustc' panicked at /rustc/f4d794ea0b845413344621d89f6c945062748485/compiler/rustc_errors/src/lib.rs:1068:30: Box stack backtrace: 0: 0x7f55a858b756 - std::backtrace_rs::backtrace::libunwind::trace::h3a8e5867b01d1b80 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5 1: 0x7f55a858b756 - std::backtrace_rs::backtrace::trace_unsynchronized::he397ef0e45adff5d at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x7f55a858b756 - std::sys_common::backtrace::_print_fmt::h25cea7a1fa724fb5 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys_common/backtrace.rs:68:5 3: 0x7f55a858b756 - ::fmt::hda7577428151df9d at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys_common/backtrace.rs:44:22 4: 0x7f55a85de080 - core::fmt::rt::Argument::fmt::hb2ec9e184bf02ba0 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/core/src/fmt/rt.rs:142:9 5: 0x7f55a85de080 - core::fmt::write::h3465386ebc0a8978 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/core/src/fmt/mod.rs:1120:17 6: 0x7f55a857f49f - std::io::Write::write_fmt::hd97c5a975dde240c at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/io/mod.rs:1810:15 7: 0x7f55a858b534 - std::sys_common::backtrace::_print::h40f73d3c1d514bff at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys_common/backtrace.rs:47:5 8: 0x7f55a858b534 - std::sys_common::backtrace::print::h52313c48a0b47ef2 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys_common/backtrace.rs:34:9 9: 0x7f55a858e2c7 - std::panicking::default_hook::{{closure}}::haa180c42e4a369b8 10: 0x7f55a858e029 - std::panicking::default_hook::h2608c79ece8d0d38 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/panicking.rs:292:9 11: 0x7f55ab354c5c - std[3786b4fe60d6306f]::panicking::update_hook::>::{closure#0} 12: 0x7f55a858ea16 - as core::ops::function::Fn>::call::hb87a29f68be8c251 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/alloc/src/boxed.rs:2029:9 13: 0x7f55a858ea16 - std::panicking::rust_panic_with_hook::h184b82fc904f3d9c at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/panicking.rs:783:13 14: 0x7f55ab38dd94 - std[3786b4fe60d6306f]::panicking::begin_panic::::{closure#0} 15: 0x7f55ab38a196 - std[3786b4fe60d6306f]::sys_common::backtrace::__rust_end_short_backtrace::::{closure#0}, !> 16: 0x7f55ab385436 - std[3786b4fe60d6306f]::panicking::begin_panic:: 17: 0x7f55ab398c91 - ::emit_producing_guarantee 18: 0x7f55ab76ebee - ::bug:: 19: 0x7f55ab80a2db - rustc_middle[f757abec48a5eb78]::util::bug::opt_span_bug_fmt::::{closure#0} 20: 0x7f55ab7f3cda - rustc_middle[f757abec48a5eb78]::ty::context::tls::with_opt::::{closure#0}, !>::{closure#0} 21: 0x7f55ab7f3b58 - rustc_middle[f757abec48a5eb78]::ty::context::tls::with_context_opt::::{closure#0}, !>::{closure#0}, !> 22: 0x7f55a978cfd0 - rustc_middle[f757abec48a5eb78]::util::bug::bug_fmt 23: 0x7f55ab7f1ca9 - rustc_middle[f757abec48a5eb78]::ty::closure::place_to_string_for_capture 24: 0x7f55ab576c58 - ::compute_2229_migrations 25: 0x7f55acfe0a2b - ::analyze_closure 26: 0x7f55a947ab62 - ::visit_expr 27: 0x7f55ac899f84 - ::visit_block 28: 0x7f55ac8fdc34 - rustc_hir_typeck[1e5186ab7a582f5e]::typeck 29: 0x7f55ac8fcc33 - rustc_query_impl[6f15f6c85c1a873b]::plumbing::__rust_begin_short_backtrace::> 30: 0x7f55ac816f03 - rustc_query_system[7fd09d8d21d1b510]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[6f15f6c85c1a873b]::plumbing::QueryCtxt, false> 31: 0x7f55ac816b90 - rustc_query_impl[6f15f6c85c1a873b]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace 32: 0x7f55acc4b86f - ::par_body_owners::::{closure#0} 33: 0x7f55acc4a065 - rustc_hir_analysis[9c2d6d0d7a0bf722]::check_crate 34: 0x7f55acef3369 - rustc_interface[6675b02aac4159d5]::passes::analysis 35: 0x7f55acef2f9d - rustc_query_impl[6f15f6c85c1a873b]::plumbing::__rust_begin_short_backtrace::> 36: 0x7f55ad5ac764 - rustc_query_system[7fd09d8d21d1b510]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[6f15f6c85c1a873b]::plumbing::QueryCtxt, false> 37: 0x7f55ad5ac555 - rustc_query_impl[6f15f6c85c1a873b]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 38: 0x7f55ad637992 - rustc_interface[6675b02aac4159d5]::interface::run_compiler::, rustc_driver_impl[5c34c1e050da57aa]::run_compiler::{closure#0}>::{closure#0} 39: 0x7f55ad5bb486 - std[3786b4fe60d6306f]::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl[5c34c1e050da57aa]::run_compiler::{closure#0}>::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>> 40: 0x7f55ad5bb2b3 - <::spawn_unchecked_, rustc_driver_impl[5c34c1e050da57aa]::run_compiler::{closure#0}>::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#1} as core[d43ed1021aff63f4]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 41: 0x7f55a8598945 - as core::ops::function::FnOnce>::call_once::h060b15507a6e395e at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/alloc/src/boxed.rs:2015:9 42: 0x7f55a8598945 - as core::ops::function::FnOnce>::call_once::h6e5319cc8a1e4225 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/alloc/src/boxed.rs:2015:9 43: 0x7f55a8598945 - std::sys::unix::thread::Thread::new::thread_start::h8fbbd825c116e901 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys/unix/thread.rs:108:17 44: 0x7f55a83849eb - 45: 0x7f55a84087cc - 46: 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 1.77.0-nightly (f4d794ea0 2023-12-28) running on x86_64-unknown-linux-gnu note: compiler flags: -Z dump-mir-dir=dir query stack during panic: #0 [typeck] type-checking `nested` #1 [analysis] running analysis passes on this crate end of query stack error: aborting due to 6 previous errors Some errors have detailed explanations: E0106, E0308, E0425, E0601. For more information about an error, try `rustc --explain E0106`. ```

Jules-Bertholet commented 10 months ago

Regression (from error) in nightly-2022-11-06

found 9 bors merge commits in the specified range

@rustbot label regression-from-stable-to-stable

Strangely, I can't get this to reproduce on beta or nightly locally or on the playground, but it does reproduce on beta/nighly Godbolt and on stable everywhere.

apiraino commented 10 months ago

WG-prioritization assigning priority (Zulip discussion).

@rustbot label -I-prioritize +P-medium