ICE when returning value bound by if let ... && let ... · Issue #99852 · rust-lang/rust (original) (raw)

stack backtrace:
   0:     0x7fcbc12a37d0 - std::backtrace_rs::backtrace::libunwind::trace::h74e6731adcfb8adc
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   1:     0x7fcbc12a37d0 - std::backtrace_rs::backtrace::trace_unsynchronized::h22bd7e644b454809
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fcbc12a37d0 - std::sys_common::backtrace::_print_fmt::hec626af75cdf5d14
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7fcbc12a37d0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hfe4102e485da4cf8
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7fcbc12fda5c - core::fmt::write::h78ef6088ea150cd5
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/core/src/fmt/mod.rs:1198:17
   5:     0x7fcbc1294eb5 - std::io::Write::write_fmt::hc440e7a0893fa000
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/io/mod.rs:1672:15
   6:     0x7fcbc12a64a1 - std::sys_common::backtrace::_print::h6f08412e91897b34
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7fcbc12a64a1 - std::sys_common::backtrace::print::he5a852bdc192e345
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7fcbc12a64a1 - std::panicking::default_hook::{{closure}}::hf308fab78552e6c7
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/panicking.rs:295:22
   9:     0x7fcbc12a6173 - std::panicking::default_hook::h66b19fed514ed5ed
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/panicking.rs:314:9
  10:     0x7fcbc1b3ff44 - rustc_driver[45495022f976cfcf]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7fcbc12a6c76 - std::panicking::rust_panic_with_hook::h9f418f85f12ababe
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/panicking.rs:702:17
  12:     0x7fcbc2ced881 - std[9611d438937dc38]::panicking::begin_panic::<rustc_errors[65e8676031e39f89]::ExplicitBug>::{closure#0}
  13:     0x7fcbc2ced5e6 - std[9611d438937dc38]::sys_common::backtrace::__rust_end_short_backtrace::<std[9611d438937dc38]::panicking::begin_panic<rustc_errors[65e8676031e39f89]::ExplicitBug>::{closure#0}, !>
  14:     0x7fcbc2ce69d6 - std[9611d438937dc38]::panicking::begin_panic::<rustc_errors[65e8676031e39f89]::ExplicitBug>
  15:     0x7fcbc2ce92f6 - std[9611d438937dc38]::panic::panic_any::<rustc_errors[65e8676031e39f89]::ExplicitBug>
  16:     0x7fcbc45bc513 - <rustc_errors[65e8676031e39f89]::HandlerInner as core[807c2f8b07026ed8]::ops::drop::Drop>::drop
  17:     0x7fcbc3cf0738 - core[807c2f8b07026ed8]::ptr::drop_in_place::<rustc_session[ee333364a5fb762c]::parse::ParseSess>
  18:     0x7fcbc3cf2ce3 - <alloc[65bf4ccb0f73bc84]::rc::Rc<rustc_session[ee333364a5fb762c]::session::Session> as core[807c2f8b07026ed8]::ops::drop::Drop>::drop
  19:     0x7fcbc3cd546d - core[807c2f8b07026ed8]::ptr::drop_in_place::<rustc_interface[21c2a0e765b4b7f4]::interface::Compiler>
  20:     0x7fcbc3cd36a9 - rustc_span[ae34330c9831655e]::with_source_map::<core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>, rustc_interface[21c2a0e765b4b7f4]::interface::create_compiler_and_run<core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>, rustc_driver[45495022f976cfcf]::run_compiler::{closure#1}>::{closure#1}>
  21:     0x7fcbc3cd7cb0 - rustc_interface[21c2a0e765b4b7f4]::interface::create_compiler_and_run::<core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>, rustc_driver[45495022f976cfcf]::run_compiler::{closure#1}>
  22:     0x7fcbc3d03542 - <scoped_tls[315da7db807c9876]::ScopedKey<rustc_span[ae34330c9831655e]::SessionGlobals>>:📐:<rustc_interface[21c2a0e765b4b7f4]::interface::run_compiler<core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>, rustc_driver[45495022f976cfcf]::run_compiler::{closure#1}>::{closure#0}, core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>>
  23:     0x7fcbc3cd58bf - std[9611d438937dc38]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[21c2a0e765b4b7f4]::util::run_in_thread_pool_with_globals<rustc_interface[21c2a0e765b4b7f4]::interface::run_compiler<core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>, rustc_driver[45495022f976cfcf]::run_compiler::{closure#1}>::{closure#0}, core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>>::{closure#0}, core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>>
  24:     0x7fcbc3cef9e9 - <<std[9611d438937dc38]::thread::Builder>::spawn_unchecked_<rustc_interface[21c2a0e765b4b7f4]::util::run_in_thread_pool_with_globals<rustc_interface[21c2a0e765b4b7f4]::interface::run_compiler<core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>, rustc_driver[45495022f976cfcf]::run_compiler::{closure#1}>::{closure#0}, core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>>::{closure#0}, core[807c2f8b07026ed8]::result::Result<(), rustc_errors[65e8676031e39f89]::ErrorGuaranteed>>::{closure#1} as core[807c2f8b07026ed8]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  25:     0x7fcbc12b06c3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h269b15882926c1ec
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/alloc/src/boxed.rs:1935:9
  26:     0x7fcbc12b06c3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h58323387bc1c2642
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/alloc/src/boxed.rs:1935:9
  27:     0x7fcbc12b06c3 - std::sys::unix::thread::Thread:🆕:thread_start::h916fd4de50349453
                               at /rustc/6dbae3ad19309bb541d9e76638e6aa4b5449f29a/library/std/src/sys/unix/thread.rs:108:17
  28:     0x7fcbc106cb43 - start_thread
                               at ./nptl/./nptl/pthread_create.c:442:8
  29:     0x7fcbc10fea00 - clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
  30:                0x0 - <unknown>

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 1.64.0-nightly (6dbae3ad1 2022-07-25) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type dylib -C opt-level=3 -C embed-bitcode=no

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack