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Re: [1.7] gvim "Cannot fork" error
On Mon, Sep 21, 2009 at 02:51:50AM -0500, Yaakov (Cygwin/X) wrote:
>On 20/09/2009 21:24, Christopher Faylor wrote:
>>This should be fixed in the next Cygwin snapshot and, subsequently, in
>>the next release.
>>
>>If you could test this and confirm that the snapshot fixes the problem
>>I'll roll a new release. It turns out to be a pretty serious bug.
>
>For me this fixes the problems reported here and those we discussed
>earlier but were unable to resolve. I agree on the seriousness of
>this, but what exactly helped you nail it down?
gdb said that the failure was coming from libxcb-1.dll so I rebuilt
libxcb-1.dll with debugging information and with a version of
libcygwin.a containing debugging symbols. Then I could see that it was
dying in cygwin in a place that has seem a fair amount of churn
recently. I could see that it had nothing to do with libxcb-1.dll.
The fix for the problem wasn't immediately obvious and it is very hacky.
I hope it can be removed in a couple of years when everything that was
built using a buggy version of libcygwin.a is gone. The problem came
from one of the X libraries that, if it had been relinked recently,
would not have manifested a problem. I'm embarrassed to admit that I
didn't record which library had the problem, though. Tracking it down
in gdb proved to be sort of time-consuming and now the window with the
information is gone.
I can say that any DLL built with cygwin-1.7.0-51 - cygwin-1.7.0-56
is probably suspect. That's 2009-07-13 - 2009-08-13 .
cgf
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