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gh-146102: Catch PyErr_NewException() failure in zlib#151342

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gh-146102: Catch PyErr_NewException() failure in zlib#151342
vstinner wants to merge 1 commit into
python:mainfrom
vstinner:zlib

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@vstinner vstinner commented Jun 11, 2026

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Comment thread Modules/zlibmodule.c
if (state->ZlibError == NULL) {
return -1;
}
if (PyModule_AddObjectRef(mod, "error", state->ZlibError) < 0) {

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This isn't strictly necessary, PyModule_AddObjectRef will return -1 if it's NULL. Looking at other modules, they also follow this pattern.

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Oh you're right! I checked PyModule_AddObjectRef() documentation and it's well documented:

To be convenient, the function accepts NULL value with an exception
set. In this case, return -1 and just leave the raised exception
unchanged.

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This change is not needed. I close the PR.

@vstinner vstinner closed this Jun 11, 2026
@vstinner vstinner deleted the zlib branch June 11, 2026 14:54
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