Ma Lin <malin...@163.com> added the comment:
Some memos:
1, In liblzma, these missing bytes were copied inside `dict_repeat` function:
788 case SEQ_COPY:
789 // Repeat len bytes from distance of rep0.
790 if (unlikely(dict_repeat(&dict, rep0, &len))) {
See liblzma's source code (xz-5.2 branch):
https://git.tukaani.org/?p=xz.git;a=blob;f=src/liblzma/lzma/lzma_decoder.c
2, Above replies said xz's command line tools can extract the problematic files
successfully.
This is because xz checks `if (avail_out == 0)` first, then checks `if
(avail_in == 0)`
See `uncompress` function in this source code (xz-5.2 branch):
https://git.tukaani.org/?p=xz.git;a=blob;f=src/xzdec/xzdec.c;hb=refs/heads/v5.2
This check order just avoids the problem.
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<https://bugs.python.org/issue21872>
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