Martin v. Löwis <mar...@v.loewis.de> added the comment: haypo: please avoid introducing explicit casts (such as the one in pyexpat.c). Use SAFECASTs instead. If you are absolutely certain that a cast cannot possibly truncate, add a comment explaining why that is. In the specific case, I think it actually *is* possible that the cast truncates, because the case that read() returned too many bytes is incorrectly handled (it should set len to -1).
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