Um, I know this isn't (yet) diligent/scientific, but must system create this
thread?
#0 0x00007ff811e09e47 in KERNEL32!CreateThread () from
/cygdrive/c/WINDOWS/System32/KERNEL32.DLL
#1 0x00000001800468eb in cygthread::create() () from /usr/bin/cygwin1.dll
#2 0x000000018010645f in pinfo::wait() () from /usr/bin/cygwin1.dll
#3 0x000000018012e562 in proc_subproc(unsigned int, unsigned long) () from
/usr/bin/cygwin1.dll
#4 0x0000000180134e85 in child_info_spawn::worker(char const*, char const*
const*, char const* const*, int, int, int) () from /usr/bin/cygwin1.dll
#5 0x0000000180136729 in spawnve () from /usr/bin/cygwin1.dll
#6 0x0000000180136d05 in spawnvp () from /usr/bin/cygwin1.dll
#7 0x0000000180144683 in system () from /usr/bin/cygwin1.dll
#8 0x000000018018effb in _sigfe () from /usr/bin/cygwin1.dll
#9 0x000000010052884b in QMachine__ExecCommand (t_L_563=0x448ef0
"\260\324\005",
'cause i.e. it complicates any lifetime/management.
I do understand some of the problems here, like needing separate threads to
read stdout/stderr, if they are not equal.
- Jay
________________________________
From: Jay K
Sent: Wednesday, January 12, 2022 4:12 AM
To: cyg...@sourceware.org <cyg...@sourceware.org>
Subject: proc_waiter: error on read of child wait pipe 0x0, Win32 error 6
I get this a lot:
0 [waitproc] cm3 7641 proc_waiter: error on read of child wait pipe 0x0,
Win32 error 6
452 [waitproc] cm3 7641 proc_waiter: error on read of child wait pipe 0x0,
Win32 error 6
716 [waitproc] cm3 7641 proc_waiter: error on read of child wait pipe 0x0,
Win32 error 6
1652 [waitproc] cm3 7641 proc_waiter: error on read of child wait pipe 0x0,
Win32 error 6
0 [main] sh 7775 C:\cygwin64\bin\sh.exe: *** fatal error - internal error
reading the windows environment - too many environment variables?
Scenario is multi-threaded "launching" a bunch of invocations of gcc.
"launching" was usually spawnve or fork/execve but I changed the code to use
system and it still happens.
I might try to make a small reproducing, if this is not known.
It seems a bit difficult to believe I could cause this internal looking error.
Thank you,
- Jay
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