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Problems with run.exe (silent crashes) - stopped working suddenly

My system is Windows 7 professional 64 bit. The Cygwin is 32 bit,
updated monthly

I have a backup script that used to run successfully from a Windows
shortcut or scheduled task as

C:\cygwin\bin\run.exe /usr/bin/bash.exe -l -c
"/home/gulliver/bin/backup >> /cygdrive/c/temp/backup.log 2>&1"

However, around August 2013 this stopped working (it took me a while to notice)

If I try in a windows command prompt it also crashed,

I get a small run.exe.stackdump file:

Stack trace:
Frame     Function  Args
00284B28  610303D2 (00000114, 0000EA60, 000000A4, 00284B78)
00284C38  610DA4DD (00000000, 00650000, 00284C78, 0028CE64)

The problem is not with the bash command or script - it runs fine from
both the command prompt or a shortcut if I change the command to

C:\cygwin\bin\bash.exe -l -c "/home/gulliver/bin/backup >>
/cygdrive/c/temp/backup.log 2>&1"

but then there is an empty Windows window open for the whole time.

A related issue is an xterm shortcut that used to work:

C:\cygwin\bin\run.exe /usr/bin/bash.exe -l -c "xterm.exe -title TTTTT
-bg '#EEFFFE' -e ssh -Y xxxx@yyyy&"

This used to work as intended. Now it opens an xterm on the local host
only - the ssh command fails. Again, removing the "run" and executing
"bash" directly works but opens a second window.

Does anyone know what might be happening or how to debug this problem?


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