Sandbox Report Issue button causes wasm to panic

[MeGaGiGaGon]

Describe the Bug

def foo(x: int | None) -> None:
    ...

When using the below playground link, follow these steps to get a wasm panic;

1. Open the below link
2. Press "Report Issue" button in the sandbox
3. Quickly close the newly opened tab with ctrl+w
4. Delete the None part of x: int | None
5. Crash/Pyrefly encountered an internal error: {}.

Note that this is not 100% consistent for me, it sometimes takes repeating the above steps 2-3 times.
Tested on Firefox, Chrome, and Safari, so should not be browser dependent.
Tested on both Windows and IOS, so should not be platform dependent.

Initial panic:

panicked at /rustc/59807616e1fa2540724bfbac14d7976d7e4a3860/library/std/src/sys/pal/wasm/../unsupported/os.rs:52:5:
no filesystem on this platform

Full browser stack trace

Stack:

__wbg_new_227d7c05414eb861@https://pyrefly.org/assets/js/3190.2d555145.js:1:4197
@https://pyrefly.org/571ae969f2f60719.wasm:wasm-function[7574]:0x654b86
@https://pyrefly.org/571ae969f2f60719.wasm:wasm-function[3812]:0x5c9960
@https://pyrefly.org/571ae969f2f60719.wasm:wasm-function[6024]:0x60da20
@https://pyrefly.org/571ae969f2f60719.wasm:wasm-function[7281]:0x64dfcd
@https://pyrefly.org/571ae969f2f60719.wasm:wasm-function[2477]:0x53bae5
@https://pyrefly.org/571ae969f2f60719.wasm:wasm-function[67]:0x9f001
@https://pyrefly.org/571ae969f2f60719.wasm:wasm-function[7087]:0x63cf90
hover@https://pyrefly.org/assets/js/3190.2d555145.js:1:545
14129/F/Se/<@https://pyrefly.org/assets/js/4129.b7cff2d0.js:1:16005
provideHover@https://pyrefly.org/assets/js/4129.b7cff2d0.js:1:6521
provideHover@https://pyrefly.org/assets/js/8285.409e4c69.js:2:288430
11950/d/r</<@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2070264
11950/l/<@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2070030
l@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2069775
11950/d/r</<@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2070194
11950/d/r<@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2070444
d@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2070155
computeAsync@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2103225
46567/computeAsync/<@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2085338
computeAsync@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2085313
46567/_triggerAsyncComputation/this._asyncIterable<@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2074364
N@https://pyrefly.org/assets/js/8285.409e4c69.js:2:529017
_triggerAsyncComputation@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2074344
46567/x/this._firstWaitScheduler<@https://pyrefly.org/assets/js/8285.409e4c69.js:2:2073483
doRun@https://pyrefly.org/assets/js/8285.409e4c69.js:2:524708
onTimeout@https://pyrefly.org/assets/js/8285.409e4c69.js:2:524648


[3190.2d555145.js:1:3243](https://pyrefly.org/assets/js/3190.2d555145.js)
    __wbg_error_a6fa202b58aa1cd3 https://pyrefly.org/assets/js/3190.2d555145.js:1
    <anonymous> https://pyrefly.org/571ae969f2f60719.wasm:6638680
    <anonymous> https://pyrefly.org/571ae969f2f60719.wasm:6068576
    <anonymous> https://pyrefly.org/571ae969f2f60719.wasm:6347296
    <anonymous> https://pyrefly.org/571ae969f2f60719.wasm:6610893
    <anonymous> https://pyrefly.org/571ae969f2f60719.wasm:5487333
    <anonymous> https://pyrefly.org/571ae969f2f60719.wasm:651265
    <anonymous> https://pyrefly.org/571ae969f2f60719.wasm:6541200
    hover https://pyrefly.org/assets/js/3190.2d555145.js:1
    Se https://pyrefly.org/assets/js/4129.b7cff2d0.js:1
    provideHover https://pyrefly.org/assets/js/4129.b7cff2d0.js:1
    provideHover https://pyrefly.org/assets/js/8285.409e4c69.js:2
    r https://pyrefly.org/assets/js/8285.409e4c69.js:2
    l https://pyrefly.org/assets/js/8285.409e4c69.js:2
    l https://pyrefly.org/assets/js/8285.409e4c69.js:2
    r https://pyrefly.org/assets/js/8285.409e4c69.js:2
    r https://pyrefly.org/assets/js/8285.409e4c69.js:2
    d https://pyrefly.org/assets/js/8285.409e4c69.js:2
    computeAsync https://pyrefly.org/assets/js/8285.409e4c69.js:2
    computeAsync https://pyrefly.org/assets/js/8285.409e4c69.js:2
    computeAsync https://pyrefly.org/assets/js/8285.409e4c69.js:2
    _asyncIterable https://pyrefly.org/assets/js/8285.409e4c69.js:2
    N https://pyrefly.org/assets/js/8285.409e4c69.js:2
    _triggerAsyncComputation https://pyrefly.org/assets/js/8285.409e4c69.js:2
    _firstWaitScheduler https://pyrefly.org/assets/js/8285.409e4c69.js:2
    doRun https://pyrefly.org/assets/js/8285.409e4c69.js:2
    onTimeout https://pyrefly.org/assets/js/8285.409e4c69.js:2

More errors happen after, though I have not included the stack traces here as they all stem from the initial wasm panic.

Sandbox Link

https://pyrefly.org/sandbox/?project=N4IgZglgNgpgziAXKOBDAdgEwEYHsAeAdAA4CeSImMYABGLrgBT6I0ToAuNAPjQHK50MAJQ0AtAD5%2BgmIgA6AJznoaqmoQ0gANCDILqUUoQ64AtlAoBiGgAVS%2BsIZposefDQDGgyAHMArgqoHBCChMrWAMowMDQAFhwcxHCIAPQpegZGuAo%2BKTDoKZi4HnApXui%2BAUEhBXTZNKgAbqjQqNiwnt4Q-oHBgjS4xH3ocGHoZByxgmKNMApwNTQAvDRyIADMhACMAExrygDacwrZcAC6yn7oEKbE2RwwmGKYEPoewbPLNADk3ejZMG%2Byn%2BHDE%2BgAjn5Xo8xABrGCkMSoDweeBwL7fADuqAU6G%2BIAAvjpkR8YAAxaAwCguHAEEjkAlAA

(Only applicable for extension issues) IDE Information

No response

[yangdanny97]

The sandbox does seem to crash from time to time for mysterious reasons. we need to add some better debug logging so we can understand why

Does it get stuck in a crashed state, or are you able to kind of reset/reload it to get it working again?

[MeGaGiGaGon]

It gets stuck permanently, the in-sandbox "Reload" button does not work, reloading the page does.