[issue8847] crash appending list and namedtuple

[Jack Diederich]

Jack Diederich <jackdied at gmail.com> added the comment:

Two more probes:

1) does it also have the same strange/crashy behavior when you subclass list and concat that to a tuple?

2) does dropping the optimization level down to -O help?  This has "compiler quirk" written all over it.  The C-code for list and tuple concat are almost identical, and both start with a type check.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8847>
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