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PyRepl tests failing with Emscripten 6.0.2 #153313
Description
Bug report
Bug description:
Reported via @encukou in this comment
The Emscripten buildbot is currently failing the PyRepl test. If I run the browser test locally, I get the following error in the JS console:
Unhandled Promise Rejection: TypeError: Module.PyUnstable_DumpTraceback is not a function. (In 'Module.PyUnstable_DumpTraceback(2, Module._PyGILState_GetThisThreadState())', 'Module.PyUnstable_DumpTraceback' is undefined)
If I revert to emscripten 6.0.0, the PyRepl page loads without a problem.
/cc @hoodmane
CPython versions tested on:
CPython main branch
Operating systems tested on:
Other
Activity
[-]Emscripten builds failing with Emscripten 6.0.2[/-][+]PyRepl tests failing with Emscripten 6.0.2[/+]hoodmane commentedon Jul 14, 2026
Problem is this:
emscripten-core/emscripten#27241
Fixed in main branch of Emscripten. Workaround is
-sGROWABLE_ARRAYBUFFERS=0.gh-153313: Work around string decoding bug in emcc 6.0.2 (gh-153698)
pythongh-153313: Run Emscripten PyRepl test in CI
gh-153313: Run Emscripten PyRepl test in CI (#153701)
[3.14] gh-153313: Run Emscripten PyRepl test in CI (GH-153701) (#153728)
[3.15] gh-153313: Run Emscripten PyRepl test in CI (GH-153701) (#153727)