Bug report

Bug description:

The error code was introduced by a security fix (atlibexpat/libexpat@51c7019) but theXML_StopParser C-API is not exposed through CPython yet so itshould not be possible to encounter such error. In particular, exposing the error code can be considered a feature or postpone until#59979 is resolved.

CPython versions tested on:

3.9, 3.10, 3.11, 3.12, 3.13, 3.14, CPython main branch

Operating systems tested on:

Linux, macOS, Windows, Other

Linked PRs

• gh-126624: Expose error codeXML_ERROR_NOT_STARTED of Expat >=2.6.4 #126625