thread 'rustc' panicked at compiler/rustc_infer/src/infer/mod.rs:956:17:
Box<dyn Any>
stack backtrace:
   0:     0x7f6d0c037b55 - std::backtrace_rs::backtrace::libunwind::trace::h39aa7bbcf61112e7
                               at /rustc/1cec373f65eb76e8e4b4d1847213cf3ec6c292b6/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x7f6d0c037b55 - std::backtrace_rs::backtrace::trace_unsynchronized::hc85da789d7f1d5d2
                               at /rustc/1cec373f65eb76e8e4b4d1847213cf3ec6c292b6/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f6d0c037b55 - std::backtrace::Backtrace::create::hcb33de73690a8229
                               at /rustc/1cec373f65eb76e8e4b4d1847213cf3ec6c292b6/library/std/src/backtrace.rs:331:13
   3:     0x7f6d0c037aa5 - std::backtrace::Backtrace::force_capture::hfc740aded7593d99
                               at /rustc/1cec373f65eb76e8e4b4d1847213cf3ec6c292b6/library/std/src/backtrace.rs:312:9
   4:     0x7f6d0f130b73 - std[531770c5e2e8d301]::panicking::update_hook::<alloc[d882034972180c03]::boxed::Box<rustc_driver_impl[427e5c398467f86b]::install_ice_hook::{closure#0}>>::{closure#0}
   5:     0x7f6d0c052b2c - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6d2f4133a0440d99
                               at /rustc/1cec373f65eb76e8e4b4d1847213cf3ec6c292b6/library/alloc/src/boxed.rs:2032:9
   6:     0x7f6d0c052b2c - std::panicking::rust_panic_with_hook::h7c86743fcac7c36d
                               at /rustc/1cec373f65eb76e8e4b4d1847213cf3ec6c292b6/library/std/src/panicking.rs:792:13
   7:     0x7f6d0f15ff54 - std[531770c5e2e8d301]::panicking::begin_panic::<rustc_errors[1b3eec32e47ffd2f]::ExplicitBug>::{closure#0}
   8:     0x7f6d0f15cbd6 - std[531770c5e2e8d301]::sys_common::backtrace::__rust_end_short_backtrace::<std[531770c5e2e8d301]::panicking::begin_panic<rustc_errors[1b3eec32e47ffd2f]::ExplicitBug>::{closure#0}, !>
   9:     0x7f6d0f15c8b6 - std[531770c5e2e8d301]::panicking::begin_panic::<rustc_errors[1b3eec32e47ffd2f]::ExplicitBug>
  10:     0x7f6d0f168f81 - <rustc_errors[1b3eec32e47ffd2f]::diagnostic::BugAbort as rustc_errors[1b3eec32e47ffd2f]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  11:     0x7f6d0f3a85b8 - <rustc_errors[1b3eec32e47ffd2f]::DiagCtxt>::span_bug::<rustc_span[53b55791d064607f]::span_encoding::Span, alloc[d882034972180c03]::string::String>
  12:     0x7f6d0f3df5fd - rustc_middle[d8712503438341b1]::util::bug::opt_span_bug_fmt::<rustc_span[53b55791d064607f]::span_encoding::Span>::{closure#0}
  13:     0x7f6d0f3df92a - rustc_middle[d8712503438341b1]::ty::context::tls::with_opt::<rustc_middle[d8712503438341b1]::util::bug::opt_span_bug_fmt<rustc_span[53b55791d064607f]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  14:     0x7f6d0f3c499b - rustc_middle[d8712503438341b1]::ty::context::tls::with_context_opt::<rustc_middle[d8712503438341b1]::ty::context::tls::with_opt<rustc_middle[d8712503438341b1]::util::bug::opt_span_bug_fmt<rustc_span[53b55791d064607f]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  15:     0x7f6d0f3c36b7 - rustc_middle[d8712503438341b1]::util::bug::span_bug_fmt::<rustc_span[53b55791d064607f]::span_encoding::Span>
  16:     0x7f6d0d0cace1 - <rustc_trait_selection[27d743aeac5b0616]::traits::fulfill::FulfillProcessor as rustc_data_structures[f4bfcbb9d91a10eb]::obligation_forest::ObligationProcessor>::process_obligation
  17:     0x7f6d104d0823 - <rustc_data_structures[f4bfcbb9d91a10eb]::obligation_forest::ObligationForest<rustc_trait_selection[27d743aeac5b0616]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[27d743aeac5b0616]::traits::fulfill::FulfillProcessor>
  18:     0x7f6d111968f7 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_argument_types
  19:     0x7f6d10525e09 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_call
  20:     0x7f6d10e3621d - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  21:     0x7f6d10e307a6 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_block_with_expected
  22:     0x7f6d10e36701 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  23:     0x7f6d10e307a6 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_block_with_expected
  24:     0x7f6d10e36701 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  25:     0x7f6d10e37d8e - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  26:     0x7f6d10e307a6 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_block_with_expected
  27:     0x7f6d10e36701 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  28:     0x7f6d10e307a6 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_block_with_expected
  29:     0x7f6d10e36701 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  30:     0x7f6d10e391e2 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  31:     0x7f6d10e391e2 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  32:     0x7f6d10e307a6 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_block_with_expected
  33:     0x7f6d10e36701 - <rustc_hir_typeck[77e1cc157524533d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  34:     0x7f6d10717821 - rustc_hir_typeck[77e1cc157524533d]::check::check_fn
  35:     0x7f6d1070dd49 - rustc_hir_typeck[77e1cc157524533d]::typeck
  36:     0x7f6d1070d709 - rustc_query_impl[ffef2ea0cc82d0dd]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[ffef2ea0cc82d0dd]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d8712503438341b1]::query::erase::Erased<[u8; 8usize]>>
  37:     0x7f6d106fd01a - rustc_query_system[219200ddf699f4fc]::query::plumbing::try_execute_query::<rustc_query_impl[ffef2ea0cc82d0dd]::DynamicConfig<rustc_query_system[219200ddf699f4fc]::query::caches::VecCache<rustc_span[53b55791d064607f]::def_id::LocalDefId, rustc_middle[d8712503438341b1]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[ffef2ea0cc82d0dd]::plumbing::QueryCtxt, true>
  38:     0x7f6d10a3e0c9 - rustc_query_impl[ffef2ea0cc82d0dd]::query_impl::typeck::get_query_incr::__rust_end_short_backtrace
  39:     0x7f6d106f8218 - <rustc_middle[d8712503438341b1]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[6a1b22ded269dcc8]::check_crate::{closure#4}>::{closure#0}
  40:     0x7f6d106f6f01 - rustc_hir_analysis[6a1b22ded269dcc8]::check_crate
  41:     0x7f6d10d88b7a - rustc_interface[336e9a5fb47021d9]::passes::analysis
  42:     0x7f6d10d886d5 - rustc_query_impl[ffef2ea0cc82d0dd]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[ffef2ea0cc82d0dd]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d8712503438341b1]::query::erase::Erased<[u8; 1usize]>>
  43:     0x7f6d112d9b4a - rustc_query_system[219200ddf699f4fc]::query::plumbing::try_execute_query::<rustc_query_impl[ffef2ea0cc82d0dd]::DynamicConfig<rustc_query_system[219200ddf699f4fc]::query::caches::SingleCache<rustc_middle[d8712503438341b1]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[ffef2ea0cc82d0dd]::plumbing::QueryCtxt, true>
  44:     0x7f6d112d975c - rustc_query_impl[ffef2ea0cc82d0dd]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
  45:     0x7f6d11180fd9 - rustc_interface[336e9a5fb47021d9]::interface::run_compiler::<core[2a3c68b720306447]::result::Result<(), rustc_span[53b55791d064607f]::ErrorGuaranteed>, rustc_driver_impl[427e5c398467f86b]::run_compiler::{closure#0}>::{closure#1}
  46:     0x7f6d1106e327 - std[531770c5e2e8d301]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[336e9a5fb47021d9]::util::run_in_thread_with_globals<rustc_interface[336e9a5fb47021d9]::util::run_in_thread_pool_with_globals<rustc_interface[336e9a5fb47021d9]::interface::run_compiler<core[2a3c68b720306447]::result::Result<(), rustc_span[53b55791d064607f]::ErrorGuaranteed>, rustc_driver_impl[427e5c398467f86b]::run_compiler::{closure#0}>::{closure#1}, core[2a3c68b720306447]::result::Result<(), rustc_span[53b55791d064607f]::ErrorGuaranteed>>::{closure#0}, core[2a3c68b720306447]::result::Result<(), rustc_span[53b55791d064607f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[2a3c68b720306447]::result::Result<(), rustc_span[53b55791d064607f]::ErrorGuaranteed>>
  47:     0x7f6d1106e0ea - <<std[531770c5e2e8d301]::thread::Builder>::spawn_unchecked_<rustc_interface[336e9a5fb47021d9]::util::run_in_thread_with_globals<rustc_interface[336e9a5fb47021d9]::util::run_in_thread_pool_with_globals<rustc_interface[336e9a5fb47021d9]::interface::run_compiler<core[2a3c68b720306447]::result::Result<(), rustc_span[53b55791d064607f]::ErrorGuaranteed>, rustc_driver_impl[427e5c398467f86b]::run_compiler::{closure#0}>::{closure#1}, core[2a3c68b720306447]::result::Result<(), rustc_span[53b55791d064607f]::ErrorGuaranteed>>::{closure#0}, core[2a3c68b720306447]::result::Result<(), rustc_span[53b55791d064607f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[2a3c68b720306447]::result::Result<(), rustc_span[53b55791d064607f]::ErrorGuaranteed>>::{closure#2} as core[2a3c68b720306447]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  48:     0x7f6d0c05ca1b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc8d25b9018534ef3
                               at /rustc/1cec373f65eb76e8e4b4d1847213cf3ec6c292b6/library/alloc/src/boxed.rs:2018:9
  49:     0x7f6d0c05ca1b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9f7c65c9881af958
                               at /rustc/1cec373f65eb76e8e4b4d1847213cf3ec6c292b6/library/alloc/src/boxed.rs:2018:9
  50:     0x7f6d0c05ca1b - std::sys::pal::unix::thread::Thread::new::thread_start::ha61a9957d3d99efc
                               at /rustc/1cec373f65eb76e8e4b4d1847213cf3ec6c292b6/library/std/src/sys/pal/unix/thread.rs:108:17
  51:     0x7f6d0bf45609 - start_thread
                               at /build/glibc-wuryBv/glibc-2.31/nptl/pthread_create.c:477:8
  52:     0x7f6d0bd19353 - clone
                               at /build/glibc-wuryBv/glibc-2.31/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:95
  53:                0x0 - <unknown>


rustc version: 1.79.0-nightly (1cec373f6 2024-04-16)
platform: x86_64-unknown-linux-gnu

query stack during panic:
#0 [typeck] type-checking `fuzz::fuzz`
#1 [analysis] running analysis passes on this crate
end of query stack