[issue21328] Resize doesn't change reported length on create_string_buffer()

[Gedai Tamás Bence]

Gedai Tamás Bence added the comment:

I found out that if you modify Modules/_cpython/callproc.c resize function in a way that you set the obj->b_length to size, the len function returns the correct value.

To be able to provide a proper patch, I'd like to look into len's implementation, can someone tell me where to look for it?

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nosy: +beng94

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<http://bugs.python.org/issue21328>
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