New submission from Arnaud Diederen:
[First of all let me say I'm not all that familiar with Windows, so please let
me know if the wording in my analysis below is not clear and/or misleading.]
It would appear the 32-bit installer for Python 2.7.11 creates the registry key:
---
HKLM\Software\Wow6432Node\Python\PythonCore\2.7\PythonPath
---
(...just like previous 2.7 versions did.)
However, registry accesses (PC/getpathp.c's getpythonpath()) are done like so:
---
(...)
keyBuf = keyBufPtr = PyMem_RawMalloc(keyBufLen);
if (keyBuf==NULL) goto done;
memcpy_s(keyBufPtr, keyBufLen, keyPrefix, sizeof(keyPrefix)-sizeof(WCHAR));
keyBufPtr += Py_ARRAY_LENGTH(keyPrefix) - 1;
mbstowcs(keyBufPtr, PyWin_DLLVersionString, versionLen);
(...)
---
where 'PyWin_DLLVersionString' now is "2.7-32":
---
.rsrc:1E2760FA unicode 0, <2.7-32>,0
---
(it used to be "2.7" in previous versions)
Thus, the key that python27.dll builds is:
HKLM\Software\Wow6432Node\Python\PythonCore\2.7-32\PythonPath
and not
HKLM\Software\Wow6432Node\Python\PythonCore\2.7\PythonPath
and consequently the runtime cannot build a proper sys.path, which causes
embedded interpreters to fail loading core modules.
As a workaround, it seems renaming the registry key to its "-32"-suffixed name,
does help.
----------
components: Installation
messages: 256113
nosy: aundro
priority: normal
severity: normal
status: open
title: 32-bit 2.7.11 installer creates registry keys that are incompatible with
the installed python27.dll
type: behavior
versions: Python 2.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue25824>
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