Hi,

A loooong time ago, we were discussing this bug, which essentially makes 
it impossible to (re)set a breakpoint on a linespec containing a 
filename with a Windows-style drive letter. This is especially bad since 
canonicalization may add this information.

Here's a link to the original discussion:
http://sourceware.org/ml/gdb-patches/2011-08/msg00473.html

I believe that only one correction was asked (by Jan) to fix-up an exec 
file name in the test suite, and I have fixed this.

I think this bug needs to be fixed for 7.4, so I humbly resubmit.

Tested against HEAD on x86_64-linux and i686-pc-cygwin (well, at least 
as best I could: there are a ton of problems with testing on cygwin -- a 
subject for some other time).

Although we may want to move linespecs.exp under gdb.linespec and rename 
it (to accommodate Tom's pending ambiguous linespec patch)?

Keith

ChangeLog
2011-11-10  Keith Seitz  <keiths@redhat.com>

	PR gdb/12843
	* linespec.c (locate_first_half): Keep ':' if it looks
	like it could be part of a Windows path starting with
	a drive letter.

testsuite/ChangeLog
2011-11-10  Keith Seitz  <keiths@redhat.com>

	PR gdb/12843
	* gdb.base/linespecs.exp: New file.