guile: guild compile hangs

[Hans-Bernhard Bröker]

Am 28.06.2017 um 13:58 schrieb Marco Atzeri:
> On 28/06/2017 01:32, Hans-Bernhard Bröker wrote:

>> FWIW, it also hangs when trying to build gdb from GIT sources (in the
>> gdb/data-directory folder).

>> I see it with "current" of Cygwin, i.e. 2.0.  The last time it worked
>> was May 20th, apparently.  The first big install after that date, here,
>> was the big round of Python updae on May 27th.

> potential candidates are:
> - libgmp
> - libiconv
> - libintl
> - libltdl
> - libunistring
> - libgc
> and cygwin itself

The closest of these in terms of update time relative to the date this 
started to fail for me would be libgc-7.6.0-1 update I installed on May 
12th.  gdb-ing into the stuck guile process shows about multiple threads 
in a waiting state:

(gdb) info thr
   Id   Target Id         Frame
   7    Thread 17376.0x4188 0x00007ffd1add8d71 in ntdll!DbgBreakPoint () 
from /cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll
   6    Thread 17376.0x2bc0 0x00007ffd1add5f04 in 
ntdll!ZwWaitForMultipleObjects () from 
/cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll
* 5    Thread 17376.0x356c 0x00007ffd1add5f04 in 
ntdll!ZwWaitForMultipleObjects () from 
/cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll
   4    Thread 17376.0x1754 0x00007ffd1add5f04 in 
ntdll!ZwWaitForMultipleObjects () from 
/cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll
   3    Thread 17376.0x868 0x00007ffd1add5f04 in 
ntdll!ZwWaitForMultipleObjects () from 
/cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll
   2    Thread 17376.0x2f3c 0x00007ffd1add5474 in ntdll!ZwReadFile () 
from /cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll
   1    Thread 17376.0x3040 0x00007ffd1add5f04 in 
ntdll!ZwWaitForMultipleObjects () from 
/cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll

and several of those waits do originate in cyggc-1.dll.

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