[issue27695] Compilation doesnt' end
Ammar Askar
report at bugs.python.org
Fri Aug 5 14:09:59 EDT 2016
Ammar Askar added the comment:
Just in case anyone is wondering why this happens. The compiler's peephole optimizer will fold constant expressions like
x = 5 + 5
into
x = 10
More specifically, this bit here: https://github.com/python/cpython/blob/0f21fe6155227d11dc02bd3ef3b061de4ecea445/Python/peephole.c#L240
I'd say the current behavior of the compilation taking a long time is fine since at runtime it would run the exact same "2 ** 12345678912345" expression and spend a long time/run out of memory.
However I'd say the fact that this happens so silently can be a "gotcha" in some very rare cases.
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nosy: +ammar2
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<http://bugs.python.org/issue27695>
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