[issue1521] string.decode() fails on long strings

[Amaury Forgeot d'Arc]

Amaury Forgeot d'Arc added the comment:

I don't have any 64bit machine to test with,
but it seems to me that there is a problem in the function
getargs.c::convertsimple(): the t# and w# formats use the buffer
interface, but the code uses an int to store its length!

Look for the variables declared as "int count;". I suggest to replace it
with a Py_ssize_t in both places.

Shouldn't the compiler emit some warning in this case?

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nosy: +amaury.forgeotdarc

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