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This or some variant also shows up with scons
(http://scons.tigris.org/issues/show_bug.cgi?id=1839) leading to some
nasty intermittent build failures. Neal may remember how we addressed
this for a Process class in a past life. Basically it's OK to collect
all the child exit codes if you record the results and return them when
requested. This would mean that waitpid and the like would have to check
a cached list of PIDs and exit statuses before actually waiting. Don't
know if that's possible/any help in this case or not...
Traceback (most recent call last):
 File "/usr/lib/scons-0.97.0d20070918/SCons/Taskmaster.py", line 194,
in execute
 self.targets[0].build()
 File "/usr/lib/scons-0.97.0d20070918/SCons/Node/__init__.py", line
365, in build
 stat = apply(executor, (self,), kw)
 File "/usr/lib/scons-0.97.0d20070918/SCons/Executor.py", line 139, in
__call__
 return self.do_execute(target, kw)
 File "/usr/lib/scons-0.97.0d20070918/SCons/Executor.py", line 129, in
do_execute
 status = apply(act, (self.targets, self.sources, env), kw)
 File "/usr/lib/scons-0.97.0d20070918/SCons/Action.py", line 332, in
__call__
 stat = self.execute(target, source, env)
 File "/usr/lib/scons-0.97.0d20070918/SCons/Action.py", line 479, in
execute
 result = spawn(shell, escape, cmd_line[0], cmd_line, ENV)
 File "/usr/lib/scons-0.97.0d20070918/SCons/Platform/posix.py", line
104, in spawnvpe_spawn
 return exec_spawnvpe([sh, '-c', string.join(args)], env)
 File "/usr/lib/scons-0.97.0d20070918/SCons/Platform/posix.py", line
68, in exec_spawnvpe
 stat = os.spawnvpe(os.P_WAIT, l[0], l, env)
 File "/sw/pkgs/python-2.3.5_00/lib/python2.3/os.py", line 553, in spawnvpe
 return _spawnvef(mode, file, args, env, execvpe)
 File "/sw/pkgs/python-2.3.5_00/lib/python2.3/os.py", line 504, in
_spawnvef
 wpid, sts = waitpid(pid, 0)
OSError: [Errno 10] No child processes
scons: building terminated because of errors.