New submission from Stefan Behnel:

Formatting support for "lld"/"llu" was added (I think) in issue 7228, but the 
definition of PY_FORMAT_SIZE_T wasn't adapted. We are getting test output 
failures in Cython on Win64 when formatting error messages using the "Id" 
format, as defined by pyport.h:

"""
#ifndef PY_FORMAT_SIZE_T
#   if SIZEOF_SIZE_T == SIZEOF_INT && !defined(__APPLE__)
#       define PY_FORMAT_SIZE_T ""
#   elif SIZEOF_SIZE_T == SIZEOF_LONG
#       define PY_FORMAT_SIZE_T "l"
#   elif defined(MS_WINDOWS)
#       define PY_FORMAT_SIZE_T "I"
#   else
#       error "This platform's pyconfig.h needs to define PY_FORMAT_SIZE_T"
#   endif
#endif
"""

The "%Id" format is not being resolved in the error messages and shows up in 
the output instead.

NumPy uses "lld" when available, starting with Py2.7:

https://github.com/numpy/numpy/blob/master/numpy/core/include/numpy/npy_common.h#L66

Shouldn't PY_FORMAT_SIZE_T become "ll" on Win64 directly?

----------
components: Interpreter Core
messages: 169500
nosy: scoder
priority: normal
severity: normal
status: open
title: Use "ll" for PY_FORMAT_SIZE_T on Win64
type: behavior
versions: Python 2.7, Python 3.3, Python 3.4

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue15827>
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