[issue22599] traceback: errors in the linecache module at exit

[STINNER Victor]

STINNER Victor added the comment:

> The patch looks fragile to me: who knows whether other similar problems can appear in other situations?

Oh, I forgot to say that yes, my patch is incomplete, but it is simple
and it is already make the code more reliable.

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<http://bugs.python.org/issue22599>
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