[issue29516] shutil.copytree(symlinks=True) fails when copying symlinks cross-device and there is no alternative

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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type: crash -> behavior

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue29516>
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