Ok, enough dithering. Let's kill this bug. File::Spec::Win32->canonpath() currently contains code to collapse .. so whether or not it should continue to do so in the future is outside the scope of this bug. That code is also busted and is the source of this bug.
Attached is a patch to fix this bug. It replaces the collapsing code in canonpath() with a more reliable method. It also moves the code into its own method to simplify canonpath(). _collapse() goes into File::Spec::Unix because it is not platform specific. Tests have been added for this bug in both Win32 and Unix.
fs.patch
Description: Binary data
