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ICE: broken mir with temporary lifetime extention #123810

Open matthiaskrgr opened 4 months ago

matthiaskrgr commented 4 months ago

auto-reduced (treereduce-rust):

fn temp() -> (String, i32) {
    (String::from("Hello"), 1)
}

fn main() {
    let f = if true { &temp() } else { &temp() };
}

original:

//@ check-pass

fn temp() -> (String, i32) {
    (String::from("Hello"), 1)
}

fn main() {
    let a = &temp();
    let b = [(&temp(),)];
    let c = &temp().0;
    let d = &temp().0[..];
    let e = {
        let _ = 123;
        &(*temp().0)[..]
    };
    let f = if true {
        &temp()
    } else {
        &temp()
    };
    let g = match true {
        true => &temp(),
        false => {
            let _ = 123;
            &temp()
        }
    };
    let h = match temp() {
        // The {} moves the value, making a new temporary.
        owned_non_temporary => &{ owned_non_temporary },
    };
    println!("{a:?} {b:?} {c:?} {d:?} {e:?} {f:?} {g:?} {h:?}");
}

Version information

rustc 1.79.0-nightly (72fe8a0f0 2024-04-11)
binary: rustc
commit-hash: 72fe8a0f0049873f4b1d0ab3c482170921819106
commit-date: 2024-04-11
host: x86_64-unknown-linux-gnu
release: 1.79.0-nightly
LLVM version: 18.1.3

Command: /home/matthias/.rustup/toolchains/master/bin/rustc -Zlint-mir

Program output (trimmed)

``` warning: unused variable: `f` --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:6:9 | 6 | let f = if true { &temp() } else { &temp() }; | ^ help: if this is intentional, prefix it with an underscore: `_f` | = note: `#[warn(unused_variables)]` on by default warning: 1 warning emitted note: no errors encountered even though delayed bugs were created note: those delayed bugs will now be shown as internal compiler errors error: internal compiler error: broken MIR in Item(DefId(0:4 ~ mvce[22c9]::main)) (after pass CheckPackedRef) at bb6[3]: use of local _5, which has no storage here --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:7:1 | 7 | } | ^ | note: delayed at compiler/rustc_mir_transform/src/lint.rs:75:22 0: ::emit_diagnostic 1: ::emit_diagnostic 2: ::emit_producing_guarantee 3: ::fail:: 4: ::visit_local 5: ::visit_place 6: ::visit_terminator 7: rustc_mir_transform::lint::lint_body 8: rustc_mir_transform::pass_manager::run_passes_inner 9: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 10: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 11: rustc_query_impl::query_impl::mir_built::get_query_non_incr::__rust_end_short_backtrace 12: rustc_mir_build::check_unsafety::check_unsafety 13: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 14: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 15: rustc_query_impl::query_impl::check_unsafety::get_query_non_incr::__rust_end_short_backtrace 16: rustc_interface::passes::analysis 17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 18: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 19: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 20: rustc_interface::interface::run_compiler::, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0} 21: std::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>> 22: <::spawn_unchecked_, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 23: as core::ops::function::FnOnce>::call_once at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/alloc/src/boxed.rs:2018:9 24: as core::ops::function::FnOnce>::call_once at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/alloc/src/boxed.rs:2018:9 25: std::sys::pal::unix::thread::Thread::new::thread_start at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/std/src/sys/pal/unix/thread.rs:108:17 26: 27: --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:7:1 | 7 | } | ^ error: internal compiler error: broken MIR in Item(DefId(0:4 ~ mvce[22c9]::main)) (after pass CheckPackedRef) at bb9[0]: use of local _3, which has no storage here --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:7:1 | 7 | } | ^ | note: delayed at compiler/rustc_mir_transform/src/lint.rs:75:22 0: ::emit_diagnostic 1: ::emit_diagnostic 2: ::emit_producing_guarantee 3: ::fail:: 4: ::visit_local 5: ::visit_place 6: ::visit_terminator 7: rustc_mir_transform::lint::lint_body 8: rustc_mir_transform::pass_manager::run_passes_inner 9: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 10: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 11: rustc_query_impl::query_impl::mir_built::get_query_non_incr::__rust_end_short_backtrace 12: rustc_mir_build::check_unsafety::check_unsafety 13: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 14: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 15: rustc_query_impl::query_impl::check_unsafety::get_query_non_incr::__rust_end_short_backtrace 16: rustc_interface::passes::analysis 17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 18: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 19: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 20: rustc_interface::interface::run_compiler::, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0} 21: std::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>> 22: <::spawn_unchecked_, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 23: as core::ops::function::FnOnce>::call_once at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/alloc/src/boxed.rs:2018:9 24: as core::ops::function::FnOnce>::call_once at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/alloc/src/boxed.rs:2018:9 25: std::sys::pal::unix::thread::Thread::new::thread_start at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/std/src/sys/pal/unix/thread.rs:108:17 26: 27: --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:7:1 | 7 | } | ^ error: internal compiler error: broken MIR in Item(DefId(0:4 ~ mvce[22c9]::main)) (after phase change to runtime-post-cleanup) at bb9[0]: use of local _5, which has no storage here --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:7:1 | 7 | } | ^ | note: delayed at compiler/rustc_mir_transform/src/lint.rs:75:22 0: ::emit_diagnostic 1: ::emit_diagnostic 2: ::emit_producing_guarantee 3: ::fail:: 4: ::visit_local 5: ::visit_place 6: ::visit_terminator 7: rustc_mir_transform::lint::lint_body 8: rustc_mir_transform::pass_manager::run_passes_inner 9: rustc_mir_transform::mir_drops_elaborated_and_const_checked 10: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 11: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 12: rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace 13: rustc_interface::passes::analysis 14: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 15: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 16: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 17: rustc_interface::interface::run_compiler::, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0} 18: std::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>> 19: <::spawn_unchecked_, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 20: as core::ops::function::FnOnce>::call_once at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/alloc/src/boxed.rs:2018:9 21: as core::ops::function::FnOnce>::call_once at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/alloc/src/boxed.rs:2018:9 22: std::sys::pal::unix::thread::Thread::new::thread_start at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/std/src/sys/pal/unix/thread.rs:108:17 23: 24: --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:7:1 | 7 | } | ^ error: internal compiler error: broken MIR in Item(DefId(0:4 ~ mvce[22c9]::main)) (after phase change to runtime-post-cleanup) at bb11[0]: use of local _3, which has no storage here --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:7:1 | 7 | } | ^ | note: delayed at compiler/rustc_mir_transform/src/lint.rs:75:22 0: ::emit_diagnostic 1: ::emit_diagnostic 2: ::emit_producing_guarantee 3: ::fail:: 4: ::visit_local 5: ::visit_place 6: ::visit_terminator 7: rustc_mir_transform::lint::lint_body 8: rustc_mir_transform::pass_manager::run_passes_inner 9: rustc_mir_transform::mir_drops_elaborated_and_const_checked 10: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 11: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 12: rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace 13: rustc_interface::passes::analysis 14: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 15: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 16: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 17: rustc_interface::interface::run_compiler::, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0} 18: std::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>> 19: <::spawn_unchecked_, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 20: as core::ops::function::FnOnce>::call_once at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/alloc/src/boxed.rs:2018:9 21: as core::ops::function::FnOnce>::call_once at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/alloc/src/boxed.rs:2018:9 22: std::sys::pal::unix::thread::Thread::new::thread_start at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/std/src/sys/pal/unix/thread.rs:108:17 23: 24: --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:7:1 | 7 | } | ^ error: internal compiler error: broken MIR in Item(DefId(0:4 ~ mvce[22c9]::main)) (after phase change to runtime-post-cleanup) at bb10[0]: use of local _3, which has no storage here --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:7:1 | 7 | } | ^ | note: delayed at compiler/rustc_mir_transform/src/lint.rs:75:22 0: ::emit_diagnostic 1: ::emit_diagnostic 2: ::emit_producing_guarantee 3: ::fail:: 4: ::visit_local 5: ::visit_place 6: ::visit_terminator 7: rustc_mir_transform::lint::lint_body 8: rustc_mir_transform::pass_manager::run_passes_inner 9: rustc_mir_transform::mir_drops_elaborated_and_const_checked 10: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 11: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 12: rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace 13: rustc_interface::passes::analysis 14: rustc_query_impl::plumbing::__rust_begin_short_backtrace::> 15: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 16: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 17: rustc_interface::interface::run_compiler::, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0} 18: std::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>> 19: <::spawn_unchecked_, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 20: as core::ops::function::FnOnce>::call_once at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/alloc/src/boxed.rs:2018:9 21: as core::ops::function::FnOnce>::call_once at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/alloc/src/boxed.rs:2018:9 22: std::sys::pal::unix::thread::Thread::new::thread_start at /rustc/72fe8a0f0049873f4b1d0ab3c482170921819106/library/std/src/sys/pal/unix/thread.rs:108:17 23: 24: --> /tmp/icemaker_global_tempdir.1uGEfYPHYLhA/rustc_testrunner_tmpdir_reporting.t0U8tjAY2duj/mvce.rs:7:1 | 7 | } | ^ 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: please make sure that you have updated to the latest nightly note: rustc 1.79.0-nightly (72fe8a0f0 2024-04-11) running on x86_64-unknown-linux-gnu note: compiler flags: -Z lint-mir -Z dump-mir-dir=dir query stack during panic: end of query stack ```

compiler-errors commented 4 months ago

This is due to #121346

opened a thread: Broken MIR

dingxiangfei2009 commented 4 months ago

@rustbot claim