Stack overflow in `lib/alt/expr.rs` / `lib/alt/operators.rs`

[qarmin]

File content(at the bottom should be attached raw, not formatted file - github removes some non-printable characters, so copying from here may not work)

This crash occurs with AddressSanitizer — a stack overflow on a normal binary may also happen with a much larger number of expressions.
If you can't reproduce the issue with the provided file, try copying and pasting more + list(2) expressions.

ds = {
    'name': [
        list(1)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
...
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)
        + list(2)

command

timeout -v 300 pyrefly check TEST___FILE.py

App was compiled with nightly rust compiler to be able to use address sanitizer
(You can ignore this part if there is no address sanitizer error)
On Ubuntu 24.04, the commands to compile were:

rustup default nightly
rustup component add rust-src --toolchain nightly-x86_64-unknown-linux-gnu
rustup component add llvm-tools-preview --toolchain nightly-x86_64-unknown-linux-gnu

export RUST_BACKTRACE=1 # or full depending on project
export ASAN_SYMBOLIZER_PATH=$(which llvm-symbolizer-18)
export ASAN_OPTIONS=symbolize=1
RUSTFLAGS="-Zsanitizer=address" cargo +nightly build --target x86_64-unknown-linux-gnu

cause this

AddressSanitizer:DEADLYSIGNAL
=================================================================
==132594==ERROR: AddressSanitizer: stack-overflow on address 0x7be7ac0f3f88 (pc 0x55a29cef29e6 bp 0x7be7ac0f47d0 sp 0x7be7ac0f3f90 T4)
    #0 0x55a29cef29e6 in __asan_memcpy /rustc/llvm/src/llvm-project/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp:63:3
    #1 0x55a29dfe4e15 in core::ptr::read::hf1a70323f659f658 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:1732:9
    #2 0x55a29dfe4e15 in _$LT$compact_str..repr..Repr$u20$as$u20$core..clone..Clone$GT$::clone::hc061de67ffea1fb7 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/compact_str-0.9.0/src/repr/mod.rs:749:22
    #3 0x55a29dfe4e15 in _$LT$compact_str..CompactString$u20$as$u20$core..clone..Clone$GT$::clone::hd79f57630f8100ad /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/compact_str-0.9.0/src/lib.rs:1952:21
    #4 0x55a29dfe4e15 in _$LT$ruff_python_ast..name..Name$u20$as$u20$core..clone..Clone$GT$::clone::hcaa5e1fffe0a48bc /home/runner/.cargo/git/checkouts/ruff-b18f69e2b025fac7/6e78586/crates/ruff_python_ast/src/name.rs:9:10
    #5 0x55a29dfe4e15 in _$LT$pyrefly..types..quantified..QuantifiedInfo$u20$as$u20$core..clone..Clone$GT$::clone::hf82146b86debc381 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/types/quantified.rs:29:5
    #6 0x55a29dfeb5d9 in _$LT$T$u20$as$u20$core..clone..uninit..CopySpec$GT$::clone_one::h5d9728449733d71d /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/clone/uninit.rs:19:33
    #7 0x55a29dfeb5d9 in _$LT$T$u20$as$u20$core..clone..CloneToUninit$GT$::clone_to_uninit::h518fbdc69f2d6900 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/clone.rs:480:18
    #8 0x55a29dfeb5d9 in _$LT$alloc..boxed..Box$LT$T$C$A$GT$$u20$as$u20$core..clone..Clone$GT$::clone::h5e238351e46ce91c /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/boxed.rs:1736:22
    #9 0x55a29dfeb5d9 in _$LT$pyrefly..types..quantified..Quantified$u20$as$u20$core..clone..Clone$GT$::clone::h8878c6ef066a5853 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/types/quantified.rs:104:5
    #10 0x55a29dfeb5d9 in _$LT$pyrefly..types..types..Type$u20$as$u20$core..clone..Clone$GT$::clone::h2914ec666c96733d (.llvm.3037252850610561958) /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/types/types.rs:519:16
    #11 0x55a29dfeba51 in _$LT$T$u20$as$u20$core..clone..uninit..CopySpec$GT$::clone_one::h962047de25122ca4 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/clone/uninit.rs:19:33
    #12 0x55a29dfeba51 in _$LT$T$u20$as$u20$core..clone..CloneToUninit$GT$::clone_to_uninit::h16591c92c789a356 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/clone.rs:480:18
    #13 0x55a29dfeba51 in _$LT$alloc..boxed..Box$LT$T$C$A$GT$$u20$as$u20$core..clone..Clone$GT$::clone::h6f0159744fff948e /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/boxed.rs:1736:22
    #14 0x55a29dfeba51 in _$LT$pyrefly..types..types..Type$u20$as$u20$core..clone..Clone$GT$::clone::h2914ec666c96733d (.llvm.3037252850610561958) /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/types/types.rs:534:10
    #15 0x55a29dfe6392 in _$LT$pyrefly..types..type_info..TypeInfo$u20$as$u20$core..clone..Clone$GT$::clone::ha83d2e4599c46613 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/types/type_info.rs:46:5
    #16 0x55a29dfd82f7 in alloc::sync::Arc$LT$T$C$A$GT$::unwrap_or_clone::_$u7b$$u7b$closure$u7d$$u7d$::hd7834cdf34ede2c2 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/sync.rs:2417:59
    #17 0x55a29dfd82f7 in core::result::Result$LT$T$C$E$GT$::unwrap_or_else::h87bb1fa69aaff5d9 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/result.rs:1521:23
...
    #570 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer::ha7c8176c65e36277 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:688:14
    #571 0x55a29d439195 in pyrefly::alt::operators::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::binop_infer::hc39d9ffc5466f7fe /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/operators.rs:219:24
    #572 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_no_trace::hdc6da618273eafd3 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:1010:36
    #573 0x55a29d42d5c1 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_info_with_hint::h3dbba492d24eacf0 (.llvm.14405042683398842614) /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:779:39
    #574 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_info::h07a4b9b5a499f401 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:692:14
    #575 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer::ha7c8176c65e36277 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:688:14
    #576 0x55a29d439195 in pyrefly::alt::operators::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::binop_infer::hc39d9ffc5466f7fe /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/operators.rs:219:24
    #577 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_no_trace::hdc6da618273eafd3 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:1010:36
    #578 0x55a29d42d5c1 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_info_with_hint::h3dbba492d24eacf0 (.llvm.14405042683398842614) /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:779:39
    #579 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_info::h07a4b9b5a499f401 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:692:14
    #580 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer::ha7c8176c65e36277 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:688:14
    #581 0x55a29d439195 in pyrefly::alt::operators::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::binop_infer::hc39d9ffc5466f7fe /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/operators.rs:219:24
    #582 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_no_trace::hdc6da618273eafd3 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:1010:36
    #583 0x55a29d42d5c1 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_info_with_hint::h3dbba492d24eacf0 (.llvm.14405042683398842614) /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:779:39
    #584 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_info::h07a4b9b5a499f401 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:692:14
    #585 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer::ha7c8176c65e36277 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:688:14
    #586 0x55a29d439195 in pyrefly::alt::operators::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::binop_infer::hc39d9ffc5466f7fe /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/operators.rs:219:24
    #587 0x55a29d439195 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_no_trace::hdc6da618273eafd3 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:1010:36
    #588 0x55a29d42d5c1 in pyrefly::alt::expr::_$LT$impl$u20$pyrefly..alt..answers..AnswersSolver$LT$Ans$GT$$GT$::expr_infer_type_info_with_hint::h3dbba492d24eacf0 (.llvm.14405042683398842614) /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/alt/expr.rs:779:39

SUMMARY: AddressSanitizer: stack-overflow /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:1732:9 in core::ptr::read::hf1a70323f659f658
Thread T4 created by T0 here:
    #0 0x55a29ced91f1 in pthread_create /rustc/llvm/src/llvm-project/compiler-rt/lib/asan/asan_interceptors.cpp:250:3
    #1 0x55a29ece90a3 in std::sys::pal::unix::thread::Thread::new::h0c85ae8f7f4783bf /rustc/45acf54eea118ed27927282b5e0bfdcd80b7987c/library/std/src/sys/pal/unix/thread.rs:76:19
    #2 0x55a29e5259af in std::thread::Builder::spawn_unchecked_::h846597670fb4b32b /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/mod.rs:598:30
    #3 0x55a29e5259af in std::thread::Builder::spawn_unchecked::h8510c2ea17b69d6a /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/mod.rs:467:37
    #4 0x55a29e50f829 in std::thread::Builder::spawn::hf10e1cfa6912cdd5 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/mod.rs:399:23
    #5 0x55a29e50f829 in _$LT$rayon_core..registry..DefaultSpawn$u20$as$u20$rayon_core..registry..ThreadSpawn$GT$::spawn::h6830149934022250 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rayon-core-1.12.1/src/registry.rs:98:11
    #6 0x55a29e47615c in rayon_core::registry::Registry::new::h1a5c5fa8a8e27e71 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rayon-core-1.12.1/src/registry.rs:304:57
    #7 0x55a29e4eabac in rayon_core::thread_pool::ThreadPool::build::h27aeb953d1dfdb50 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rayon-core-1.12.1/src/thread_pool/mod.rs:69:24
    #8 0x55a29e4c6063 in rayon_core::ThreadPoolBuilder$LT$S$GT$::build::h44a06cc59280eb93 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rayon-core-1.12.1/src/lib.rs:267:9
    #9 0x55a29e4c6063 in pyrefly_util::thread_pool::ThreadPool::with_thread_count::ha0a570132c1d86cb /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly_util/src/thread_pool.rs:65:28
    #10 0x55a29e4c67de in pyrefly_util::thread_pool::ThreadPool::new::h063d7b5bf5bee9af /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly_util/src/thread_pool.rs:72:9
    #11 0x55a29ddeacae in pyrefly::state::state::State::new::h2a0d0b3d4a656bc9 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/state/state.rs:1495:22
    #12 0x55a29d8625b3 in pyrefly::commands::check::Args::run_once::h307a24135aee1d1b /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/lib/commands/check.rs:455:37
    #13 0x55a29cf51f03 in pyrefly::run_check::_$u7b$$u7b$closure$u7d$$u7d$::had8f611bc65c8513 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/bin/main.rs:149:14
    #14 0x55a29cf51f03 in pyrefly::run_command::_$u7b$$u7b$closure$u7d$$u7d$::hfff3a1bb6ee928d5 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/bin/main.rs:276:81
    #15 0x55a29cf5d4b0 in pyrefly::run::_$u7b$$u7b$closure$u7d$$u7d$::he9878d1a47430510 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/bin/main.rs:366:44
    #16 0x55a29cf5d4b0 in pyrefly::main::_$u7b$$u7b$closure$u7d$$u7d$::h562745535025837d (.llvm.17870561335523815327) /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/bin/main.rs:373:21
    #17 0x55a29cfc57aa in _$LT$core..pin..Pin$LT$P$GT$$u20$as$u20$core..future..future..Future$GT$::poll::hb5bdfd215ad91f52 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/future.rs:124:9
    #18 0x55a29cfc57aa in _$LT$core..pin..Pin$LT$P$GT$$u20$as$u20$core..future..future..Future$GT$::poll::he22cad6e0e69b2a5 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/future.rs:124:9
    #19 0x55a29cfc57aa in tokio::runtime::scheduler::current_thread::CoreGuard::block_on::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h7e2ae9c0bd3fe0e3 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/scheduler/current_thread/mod.rs:733:70
    #20 0x55a29cfc57aa in tokio::task::coop::with_budget::hf30954acc53ed624 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/task/coop/mod.rs:167:5
    #21 0x55a29cfc57aa in tokio::task::coop::budget::h68c7cf13e6c545f6 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/task/coop/mod.rs:133:5
    #22 0x55a29cfc57aa in tokio::runtime::scheduler::current_thread::CoreGuard::block_on::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h56095b95addec6e0 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/scheduler/current_thread/mod.rs:733:25
    #23 0x55a29cfc57aa in tokio::runtime::scheduler::current_thread::Context::enter::h8e12e8facc69c42b /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/scheduler/current_thread/mod.rs:432:19
    #24 0x55a29cfc57aa in tokio::runtime::scheduler::current_thread::CoreGuard::block_on::_$u7b$$u7b$closure$u7d$$u7d$::h08946be7e19be240 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/scheduler/current_thread/mod.rs:732:44
    #25 0x55a29cfc57aa in tokio::runtime::scheduler::current_thread::CoreGuard::enter::_$u7b$$u7b$closure$u7d$$u7d$::he7570a4200721d8e /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/scheduler/current_thread/mod.rs:820:68
    #26 0x55a29cfc57aa in tokio::runtime::context::scoped::Scoped$LT$T$GT$::set::hd703c65a811f1b70 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/context/scoped.rs:40:9
    #27 0x55a29d0235c5 in tokio::runtime::context::set_scheduler::_$u7b$$u7b$closure$u7d$$u7d$::heba937da233dba99 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/context.rs:176:38
    #28 0x55a29d0235c5 in std::thread::local::LocalKey$LT$T$GT$::try_with::h6c20790c9bcd6f67 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/local.rs:315:12
    #29 0x55a29d0235c5 in std::thread::local::LocalKey$LT$T$GT$::with::h568a509846faeb55 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/local.rs:279:20
    #30 0x55a29cfc6c1a in tokio::runtime::context::set_scheduler::h077f62e39566cf5b /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/context.rs:176:17
    #31 0x55a29cfc6c1a in tokio::runtime::scheduler::current_thread::CoreGuard::enter::h945fb4e23c54a6b0 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/scheduler/current_thread/mod.rs:820:27
    #32 0x55a29cfc6c1a in tokio::runtime::scheduler::current_thread::CoreGuard::block_on::haeaafb8f79032e36 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/scheduler/current_thread/mod.rs:720:24
    #33 0x55a29cfc6c1a in tokio::runtime::scheduler::current_thread::CurrentThread::block_on::_$u7b$$u7b$closure$u7d$$u7d$::hcc985703ef7eaffc /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/scheduler/current_thread/mod.rs:200:33
    #34 0x55a29cfc6c1a in tokio::runtime::context::runtime::enter_runtime::h52a605c9ed8a70b2 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/context/runtime.rs:65:16
    #35 0x55a29cfc6c1a in tokio::runtime::scheduler::current_thread::CurrentThread::block_on::h10b04c9d8ddfa888 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/scheduler/current_thread/mod.rs:188:9
    #36 0x55a29cfc6c1a in tokio::runtime::runtime::Runtime::block_on_inner::h9c14711def37924b /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/runtime.rs:356:52
    #37 0x55a29cfc6c1a in tokio::runtime::runtime::Runtime::block_on::h47515eebbb7d0a05 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.45.0/src/runtime/runtime.rs:328:18
    #38 0x55a29cf8ff0f in pyrefly::main::h18895ec6b229c2b0 /home/runner/work/Automated-Fuzzer/Automated-Fuzzer/pyrefly-main/pyrefly/bin/main.rs:374:15
    #39 0x55a29d030402 in core::ops::function::FnOnce::call_once::h9c37cb92bfd4dbf7 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:250:5
    #40 0x55a29d030402 in std::sys::backtrace::__rust_begin_short_backtrace::h538ea720e6d80b08 /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/backtrace.rs:152:18
    #41 0x55a29d03037b in std::rt::lang_start::h9c84ce74a5af60ce /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/rt.rs:205:5
    #42 0x7fe7b122a1c9  (/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9) (BuildId: 42c84c92e6f98126b3e2230ebfdead22c235b667)
    #43 0x7fe7b122a28a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28a) (BuildId: 42c84c92e6f98126b3e2230ebfdead22c235b667)
    #44 0x55a29ce681a4 in _start (/home/runner/.cargo/bin/pyrefly+0xf611a4) (BuildId: 9a57bd62d62f149b1787bc7eb9c1e2c02e4c12c3)

==132594==ABORTING

##### Automatic Fuzzer note, output status "Some(1)", output signal "None"

compressed.zip

[yangdanny97]

Thanks for reporting! It's been a while so let me see if this repros.

[yangdanny97]

Putting this back up for grabs because I may not get to it this week

[asukaminato0721]

this seems fixed. only these error

  Possible overloads:
  () -> None
  (iterable: Iterable[_T], /) -> None [closest match]
ERROR Parse error: unexpected EOF while parsing [parse-error]
--> 450_IDX_0_RAND_159770771797323603782337_minimized_16.py:1:1
 |
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 INFO 380 errors