Fuzz: "==5866== ERROR: libFuzzer: out-of-memory (used: 4328Mb; limit: 4096Mb)" (ubuntu-latest)

[github-actions]

The fuzz-testing workflow has detected a bug.

Auto-Minimized Fuzzing Input That Triggers the Bug: Click this line.

Note: If the input is multi-line then the end-of-line characters ' ' (0x0A) and ' ' (0x0D) may affect the reproducibility of the bug. If you fail to repro the bug with the input shown below then you may want to go to the workflow that reported this GitHub bug, download the artifact, and extract the file with the exact minimized input.

The branch/commit the bug has been found in: Click.

If the developers fail to repro the bug in the latest main then the branch/commit info below can help them to make sure that they are using the correct way to repro. If the bug is reproducible in the branch/commit below, but not in latest main, then the bug is likely fixed already or is not in the main branch.

Branch: * main

commit 06875b89952ba8becd5d2f399eba95644b52e8ce
Author: João Boechat <joaoboechat@microsoft.com>
Date:   Thu Mar 19 11:31:24 2026 -0700

    Update rust to 1.93.0, and upgrade rust dependencies (#3020)
    
    # Notes:
    
    ## miette to 7.6
    - Due to some line wrapping updates in the package (lines can now hold
    more characters), a few tests broke, so I had to update the expected
    values.
    - The new version introduces a [false-positive
    warning.](https://github.com/rust-lang/rust/issues/147648). A workaround
    was applied, allowing unused variables, but this needs to be removed
    once the issue is fixed.
    
    ## pyo3 to 0.28
    - The FromPyObject implementation for #[pyclass] types that implement
    Clone was default and now is opt-in. So, I simply added
    “(from_py_object)” to those types to opt-in for that implementation.
    
    ## ndarray to 0.17
    - First, I had to update quantum-sparse-sim and then change the commit
    hash being pointed at.
    
    ## rust to 1.93
    - Had to deal with some linting enforcements by clippy
    
    ---------
    
    Co-authored-by: joao-boechat <joaoboehcat@microsoft.com>

Other Info

• Workflow (contains the run artifacts).
• Workflow Agent System Info: ubuntu-latest: Linux runnervm46oaq 6.14.0-1017-azure #17~24.04.1-Ubuntu SMP Mon Dec 1 20:10:50 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux.

[orpuente-MS]

Here is a minimal repro for this one:

Open VS-Code on an empty openqasm file, and paste this in:

bit[9551615] c;

I am pretty sure this is the openqasm lowerer trying to build a default value for this. I need to look into it.

[orpuente-MS]

This is the fuzzer hanging on a huge default array allocation at lowering time. Closing this issue since this is expected behavior.