[GC] assertion left != right failed: 0x110 is supposedly live; should have nonzero ref count

[vouillon]

Test Case

localfunction.zip

Steps to Reproduce

Run the following command:

./target/debug/wasmtime  -W=all-proposals=y localfunction.wasm

Expected Results

This works fine if one add the -C collector=null option:

$ ./target/debug/wasmtime -C collector=null  -W=all-proposals=y localfunction.wasm
5840

Actual Results

We get a panic:

thread 'main' panicked at crates/wasmtime/src/runtime/vm/gc/enabled/drc.rs:142:9:
assertion `left != right` failed: 0x110 is supposedly live; should have nonzero ref count
  left: 0
 right: 0
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'main' panicked at crates/wasmtime/src/runtime/vm/gc/enabled/drc.rs:167:9:
assertion `left != right` failed: 0x110 is supposedly live; should have nonzero ref count
  left: 0
 right: 0
stack backtrace:
   0:     0x5a63fb6a476a - std::backtrace_rs::backtrace::libunwind::trace::h5a5b8284f2d0c266
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
   1:     0x5a63fb6a476a - std::backtrace_rs::backtrace::trace_unsynchronized::h76d4f1c9b0b875e3
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x5a63fb6a476a - std::sys::backtrace::_print_fmt::hc4546b8364a537c6
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/backtrace.rs:66:9
   3:     0x5a63fb6a476a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h5b6bd5631a6d1f6b
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/backtrace.rs:39:26
   4:     0x5a63fb6ce503 - core::fmt::rt::Argument::fmt::h270f6602a2b96f62
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/fmt/rt.rs:177:76
   5:     0x5a63fb6ce503 - core::fmt::write::h7550c97b06c86515
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/fmt/mod.rs:1186:21
   6:     0x5a63fb69ffc3 - std::io::Write::write_fmt::h7b09c64fe0be9c84
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/io/mod.rs:1839:15
   7:     0x5a63fb6a45b2 - std::sys::backtrace::BacktraceLock::print::h2395ccd2c84ba3aa
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/backtrace.rs:42:9
   8:     0x5a63fb6a569c - std::panicking::default_hook::{{closure}}::he19d4c7230e07961
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:268:22
   9:     0x5a63fb6a54e2 - std::panicking::default_hook::hf614597d3c67bbdb
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:295:9
  10:     0x5a63fb6a5c77 - std::panicking::rust_panic_with_hook::h8942133a8b252070
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:801:13
  11:     0x5a63fb6a5b0a - std::panicking::begin_panic_handler::{{closure}}::hb5f5963570096b29
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:674:13
  12:     0x5a63fb6a4c49 - std::sys::backtrace::__rust_end_short_backtrace::h6208cedc1922feda
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/backtrace.rs:170:18
  13:     0x5a63fb6a579c - rust_begin_unwind
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:665:5
  14:     0x5a63f7799390 - core::panicking::panic_fmt::h0c3082644d1bf418
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/panicking.rs:74:14
  15:     0x5a63f77997f5 - core::panicking::assert_failed_inner::h2ddf1fcc067fa858
  16:     0x5a63f77989e3 - core::panicking::assert_failed::he996b0f85b093fc8
  17:     0x5a63f9a20bab - wasmtime::runtime::vm::gc::enabled::drc::DrcHeap::dec_ref::hedee28eb8908882f
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/gc/enabled/drc.rs:167:9
  18:     0x5a63f9a21054 - wasmtime::runtime::vm::gc::enabled::drc::DrcHeap::dec_ref_and_maybe_dealloc::h1e7fa8dbf0f76afe
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/gc/enabled/drc.rs:191:12
  19:     0x5a63f9a22844 - <wasmtime::runtime::vm::gc::enabled::drc::DrcHeap as wasmtime::runtime::vm::gc::gc_runtime::GcHeap>::write_gc_ref::h907c2f5b9fd965de
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/gc/enabled/drc.rs:503:13
  20:     0x5a63f9aa19cf - wasmtime::runtime::vm::gc::gc_runtime::GcHeap::drop_gc_ref::h3fd8951c49276ad4
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/gc/gc_runtime.rs:135:9
  21:     0x5a63f9af0025 - wasmtime::runtime::vm::gc::GcStore::drop_gc_ref::h83ca711fdd26510d
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/gc.rs:132:13
  22:     0x5a63f98183c5 - wasmtime::runtime::gc::enabled::rooting::RootSet::exit_lifo_scope_slow::hc31f21972eab0174
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/gc/enabled/rooting.rs:443:17
  23:     0x5a63f9818135 - wasmtime::runtime::gc::enabled::rooting::RootSet::exit_lifo_scope::hb268344dded0d6a3
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/gc/enabled/rooting.rs:422:13
  24:     0x5a63f97cee70 - wasmtime::runtime::store::StoreOpaque::exit_gc_lifo_scope::h44bd36e830734cde
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/store.rs:1492:9
  25:     0x5a63f9a6d725 - <wasmtime::runtime::gc::enabled::rooting::OpaqueRootScope<S> as core::ops::drop::Drop>::drop::ha14dd9b0aeec651d
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/gc/enabled/rooting.rs:1247:9
  26:     0x5a63f9a4df0b - core::ptr::drop_in_place<wasmtime::runtime::gc::enabled::rooting::OpaqueRootScope<&mut wasmtime::runtime::store::StoreOpaque>>::h59a509a3e5e5c5f8
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/ptr/mod.rs:574:1
  27:     0x5a63f9b49968 - wasmtime::runtime::vm::libcalls::array_copy::h31ca675977d4cf37
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/libcalls.rs:1000:1
  28:     0x5a63f97d10f8 - wasmtime::runtime::vm::libcalls::raw::array_copy::{{closure}}::{{closure}}::he609ade1bf0fe50d
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/libcalls.rs:122:33
  29:     0x5a63f98d1d1f - wasmtime::runtime::vm::instance::InstanceAndStore::from_vmctx::h70b7552243828ec3
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/instance.rs:124:9
  30:     0x5a63f97d1082 - wasmtime::runtime::vm::libcalls::raw::array_copy::{{closure}}::h069e468a9f8d43bc
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/libcalls.rs:120:29
  31:     0x5a63f9b186d9 - <core::result::Result<T,E> as wasmtime::runtime::vm::traphandlers::HostResult>::maybe_catch_unwind::{{closure}}::h7870e327860e3570
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/traphandlers.rs:213:31
  32:     0x5a63f973efcd - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h97e8c5250be12328
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/panic/unwind_safe.rs:272:9
  33:     0x5a63f9b2dd1d - std::panicking::try::do_call::h6ddcfddda81ba7e9
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:557:40
  34:     0x5a63f984e37b - __rust_try
  35:     0x5a63f984d449 - std::panicking::try::h359f8a567d0cf151
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:520:19
  36:     0x5a63f984d449 - std::panic::catch_unwind::haf37da711ec3695b
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panic.rs:358:14
  37:     0x5a63f99db9a4 - <core::result::Result<T,E> as wasmtime::runtime::vm::traphandlers::HostResult>::maybe_catch_unwind::h70a996b0428a25ac
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/traphandlers.rs:222:19
  38:     0x5a63f9b0ef3d - wasmtime::runtime::vm::traphandlers::catch_unwind_and_record_trap::h153a9f7f708e7bb2
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/traphandlers.rs:117:25
  39:     0x5a63f97baa09 - wasmtime::runtime::vm::libcalls::raw::array_copy::hcd61143763fafd13
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/libcalls.rs:119:25
  40:     0x706e77362029 - <unknown>
  41:     0x706e77319a4f - <unknown>
  42:     0x706e77326c4a - <unknown>
  43:     0x706e77319ea1 - <unknown>
  44:     0x706e77313381 - <unknown>
  45:     0x706e773127db - <unknown>
  46:     0x706e7735d437 - <unknown>
  47:     0x5a63f977f3b6 - wasmtime::runtime::vm::vmcontext::VMFuncRef::array_call_native::hdea3785bb4610271
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/vmcontext.rs:792:9
  48:     0x5a63f977f1f2 - wasmtime::runtime::vm::vmcontext::VMFuncRef::array_call::ha55c8ae49afd506e
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/vmcontext.rs:753:21
  49:     0x5a63f7d9cbfc - wasmtime::runtime::func::Func::call_unchecked_raw::{{closure}}::h88a03ffbbb134962
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/func.rs:1073:13
  50:     0x5a63f8841905 - wasmtime::runtime::vm::traphandlers::catch_traps::{{closure}}::call_closure::h50ce0da9b682a048
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/traphandlers.rs:390:30
  51:     0x5a63f9b1c11a - wasmtime_setjmp_30_0_0
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/helpers.c:72:10
  52:     0x5a63f8842129 - wasmtime::runtime::vm::traphandlers::catch_traps::{{closure}}::ha6fb0a64699388c2
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/traphandlers.rs:383:32
  53:     0x5a63f88a360e - wasmtime::runtime::vm::traphandlers::<impl wasmtime::runtime::vm::traphandlers::call_thread_state::CallThreadState>::with::{{closure}}::h00254d3f0b0c571d
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/traphandlers.rs:553:50
  54:     0x5a63f876d12c - wasmtime::runtime::vm::traphandlers::tls::set::h1cf58d7c3446d0df
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/traphandlers.rs:970:13
  55:     0x5a63f8665c9b - wasmtime::runtime::vm::traphandlers::<impl wasmtime::runtime::vm::traphandlers::call_thread_state::CallThreadState>::with::h787565d25f149112
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/traphandlers.rs:553:25
  56:     0x5a63f883f198 - wasmtime::runtime::vm::traphandlers::catch_traps::h1a4c62543be84e60
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/vm/traphandlers.rs:365:18
  57:     0x5a63f7d99000 - wasmtime::runtime::func::invoke_wasm_and_catch_traps::h697dc02191f17259
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/func.rs:1607:22
  58:     0x5a63f7d9caa8 - wasmtime::runtime::func::Func::call_unchecked_raw::h047b98e422e9e965
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/func.rs:1072:9
  59:     0x5a63f7d9b983 - wasmtime::runtime::func::Func::call_unchecked::hefbd054928b5a174
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/func.rs:1064:9
  60:     0x5a63f7d9bd02 - wasmtime::runtime::func::Func::call_impl_do_call::h59b08bb15808d2af
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/func.rs:1250:13
  61:     0x5a63f7d9b351 - wasmtime::runtime::func::Func::call_async::{{closure}}::{{closure}}::ha1e0aa6a9b35966b
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/func.rs:1159:40
  62:     0x5a63f86d5aa3 - wasmtime::runtime::store::async_::<impl wasmtime::runtime::store::context::StoreContextMut<T>>::on_fiber::{{closure}}::{{closure}}::hb3a4b7b839b41a92
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/store/async_.rs:395:34
  63:     0x5a63f8251d00 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hfa78e18cb51f0dfa
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/alloc/src/boxed.rs:2454:9
  64:     0x5a63f89cdae5 - wasmtime_fiber::Suspend<Resume,Yield,Return>::execute::{{closure}}::h8797b0ed018f185f
                               at /home/jerome/sources/wasmtime/crates/fiber/src/lib.rs:244:66
  65:     0x5a63f87d5019 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h88e204674411056b
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/panic/unwind_safe.rs:272:9
  66:     0x5a63f7a0dc91 - std::panicking::try::do_call::h0793094418008093
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:557:40
  67:     0x5a63f7f9476b - __rust_try
  68:     0x5a63f7f52cb7 - std::panicking::try::hce03d7f03305f4a5
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:520:19
  69:     0x5a63f7f52cb7 - std::panic::catch_unwind::h08c95a8c228673a2
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panic.rs:358:14
  70:     0x5a63f89cd8aa - wasmtime_fiber::Suspend<Resume,Yield,Return>::execute::hf389991feaa1e18e
                               at /home/jerome/sources/wasmtime/crates/fiber/src/lib.rs:244:26
  71:     0x5a63f89e41b8 - wasmtime_fiber::unix::fiber_start::hf9e05070b86c5d41
                               at /home/jerome/sources/wasmtime/crates/fiber/src/unix.rs:217:9
  72:     0x5a63fae46a58 - wasmtime_fiber_start_30_0_0
  73:     0x5a63fae46abc - wasmtime_fiber::unix::asan_disabled::fiber_switch::hb972c99679bb3eb0
                               at /home/jerome/sources/wasmtime/crates/fiber/src/unix.rs:488:9
  74:     0x5a63f9ae76d0 - wasmtime_fiber::unix::Fiber::resume::h71291a4b0c518214
                               at /home/jerome/sources/wasmtime/crates/fiber/src/unix.rs:251:13
  75:     0x5a63f9a1de49 - wasmtime_fiber::Fiber<Resume,Yield,Return>::resume::h3a227158f8ef7f29
                               at /home/jerome/sources/wasmtime/crates/fiber/src/lib.rs:183:9
  76:     0x5a63f974b73a - wasmtime::runtime::store::async_::<impl wasmtime::runtime::store::context::StoreContextMut<T>>::on_fiber::{{closure}}::FiberFuture::resume::h9d7703ef321355a3
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/store/async_.rs:520:28
  77:     0x5a63f974b9d7 - <wasmtime::runtime::store::async_::<impl wasmtime::runtime::store::context::StoreContextMut<T>>::on_fiber::{{closure}}::FiberFuture as core::future::future::Future>::poll::h5c4302a5c922ba27
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/store/async_.rs:578:27
  78:     0x5a63f86c8559 - <&mut F as core::future::future::Future>::poll::hf9983eef60c0d90c
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/future/future.rs:111:9
  79:     0x5a63f86c9c3d - wasmtime::runtime::store::async_::<impl wasmtime::runtime::store::context::StoreContextMut<T>>::on_fiber::{{closure}}::h1c2f20bb3e99f87a
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/store/async_.rs:410:23
  80:     0x5a63f7d9b0db - wasmtime::runtime::func::Func::call_async::{{closure}}::h64cb52e231c06ed2
                               at /home/jerome/sources/wasmtime/crates/wasmtime/src/runtime/func.rs:1160:14
  81:     0x5a63f87321e2 - wasmtime_cli::commands::run::RunCommand::invoke_func::{{closure}}::hbf7bf108424d9ba7
                               at /home/jerome/sources/wasmtime/src/commands/run.rs:542:14
  82:     0x5a63f8730b7b - wasmtime_cli::commands::run::RunCommand::load_main_module::{{closure}}::hca3d653effd9d4c7
                               at /home/jerome/sources/wasmtime/src/commands/run.rs:463:65
  83:     0x5a63f872e0bc - wasmtime_cli::commands::run::RunCommand::execute::{{closure}}::{{closure}}::h1831bca96eef9473
                               at /home/jerome/sources/wasmtime/src/commands/run.rs:222:22
  84:     0x5a63f853bf69 - <tokio::time::timeout::Timeout<T> as core::future::future::Future>::poll::h0b63b49b0cb34b8a
                               at /home/jerome/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.30.0/src/time/timeout.rs:202:33
  85:     0x5a63f872d271 - wasmtime_cli::commands::run::RunCommand::execute::{{closure}}::h0e6a45b1bdc897de
                               at /home/jerome/sources/wasmtime/src/commands/run.rs:230:14
  86:     0x5a63f87e07a3 - tokio::runtime::park::CachedParkThread::block_on::{{closure}}::h1ea11bcc08cb3567
                               at /home/jerome/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.30.0/src/runtime/park.rs:282:63
  87:     0x5a63f87e0047 - tokio::runtime::coop::with_budget::h88ee66f944a674e7
                               at /home/jerome/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.30.0/src/runtime/coop.rs:107:5
  88:     0x5a63f87e0047 - tokio::runtime::coop::budget::h0044023e231d8246
                               at /home/jerome/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.30.0/src/runtime/coop.rs:73:5
  89:     0x5a63f87e0047 - tokio::runtime::park::CachedParkThread::block_on::hd7144c755a92c43b
                               at /home/jerome/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.30.0/src/runtime/park.rs:282:31
  90:     0x5a63f818bb57 - tokio::runtime::context::blocking::BlockingRegionGuard::block_on::h0d158157ea6ee905
                               at /home/jerome/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.30.0/src/runtime/context/blocking.rs:66:9
  91:     0x5a63f7db0b75 - tokio::runtime::scheduler::multi_thread::MultiThread::block_on::{{closure}}::h14e3b364278bf7c5
                               at /home/jerome/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.30.0/src/runtime/scheduler/multi_thread/mod.rs:87:13
  92:     0x5a63f879fdcb - tokio::runtime::context::runtime::enter_runtime::h62b68efdf1542d85
                               at /home/jerome/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.30.0/src/runtime/context/runtime.rs:65:16
  93:     0x5a63f7db09e0 - tokio::runtime::scheduler::multi_thread::MultiThread::block_on::h67f42a74093be960
                               at /home/jerome/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.30.0/src/runtime/scheduler/multi_thread/mod.rs:86:9
  94:     0x5a63f7c8a193 - tokio::runtime::runtime::Runtime::block_on::he39294c9dbd142e4
                               at /home/jerome/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.30.0/src/runtime/runtime.rs:349:45
  95:     0x5a63f7db3a3a - wasmtime_cli::commands::run::RunCommand::execute::h78bb2859f74206be
                               at /home/jerome/sources/wasmtime/src/commands/run.rs:179:22
  96:     0x5a63f779bf73 - wasmtime::Wasmtime::execute::h466f564696f3b5cf
                               at /home/jerome/sources/wasmtime/src/bin/wasmtime.rs:100:35
  97:     0x5a63f779c2ab - wasmtime::main::h194ca1414ba22cb1
                               at /home/jerome/sources/wasmtime/src/bin/wasmtime.rs:158:12
  98:     0x5a63f77a16fb - core::ops::function::FnOnce::call_once::h65c2d1d6cf195453
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/ops/function.rs:250:5
  99:     0x5a63f77a064d - std::sys::backtrace::__rust_begin_short_backtrace::h432c422713a52d83
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/backtrace.rs:154:18
 100:     0x5a63f7799fa1 - std::rt::lang_start::{{closure}}::h25738480edd4d4b7
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/rt.rs:195:18
 101:     0x5a63fb695ede - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hfdb85f4ee94732d3
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/ops/function.rs:284:13
 102:     0x5a63fb695ede - std::panicking::try::do_call::h6e577310f330cbef
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:557:40
 103:     0x5a63fb695ede - std::panicking::try::ha588d438267d2645
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:520:19
 104:     0x5a63fb695ede - std::panic::catch_unwind::h429fda1e025f26d9
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panic.rs:358:14
 105:     0x5a63fb695ede - std::rt::lang_start_internal::{{closure}}::h7b731265e841c4bf
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/rt.rs:174:48
 106:     0x5a63fb695ede - std::panicking::try::do_call::hc0f6a675b7ae5a36
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:557:40
 107:     0x5a63fb695ede - std::panicking::try::h4c93b7ff0671f1ff
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:520:19
 108:     0x5a63fb695ede - std::panic::catch_unwind::hcc1e154961d16ce6
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panic.rs:358:14
 109:     0x5a63fb695ede - std::rt::lang_start_internal::h1c66660c99c8424c
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/rt.rs:174:20
 110:     0x5a63f7799f7a - std::rt::lang_start::h886043b2ccf84952
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/rt.rs:194:17
 111:     0x5a63f779e6de - main
 112:     0x706e7742a3b8 - __libc_start_call_main
                               at ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
 113:     0x706e7742a47b - __libc_start_main_impl
                               at ./csu/../csu/libc-start.c:360:3
 114:     0x5a63f7799e75 - _start
 115:                0x0 - <unknown>
thread 'main' panicked at core/src/panicking.rs:229:5:
panic in a destructor during cleanup
thread caused non-unwinding panic. aborting.

Versions and Environment

Wasmtime commit: 0e05600

Operating system: Linux

Architecture: x64

[fitzgen]

Thanks for this bug report as well!

Ditto regarding reducing the test case, if you have time.

[vouillon]

This seems to have something to do with array.copy:

(module
 (type $0 (array (mut (ref eq))))
 (type $1 (func))
 (global $global$0 (ref $0) (array.new_fixed $0 1
  (array.new_fixed $0 0)
 ))
 (export "" (func $0))
 (func $0
  (local $0 (ref $0))
  (local.set $0
   (global.get $global$0)
  )
  (array.copy $0 $0
   (local.get $0)
   (i32.const 0)
   (local.get $0)
   (i32.const 0)
   (i32.const 1)
  )
 )
)