[issue39430] tarfile.open(mode="r") race condition when importing lzma

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

PR 18161 fixes race condition by using "from ... import ..." which waits until the module be completely initialized if the specified names are not set.

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components: +Library (Lib)
nosy: +serhiy.storchaka
type: crash -> behavior
versions: +Python 3.8, Python 3.9

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<https://bugs.python.org/issue39430>
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