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Date:	Fri, 9 Apr 2010 10:47:51 -0500
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Subject:	sh.exe: *** fatal error - couldn't allocate heap, Win32 error 487
From:	Ricardo Urbina <ricardo DOT urbina AT gmail DOT com>
To:	cygwin AT cygwin DOT com
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Hi. Last tuesday I updated my Cygwin installation from 1.7.1 to 1.7.4.
And then I started getting these errors when running a perl script:

% perlscript
      3 [main] sh 11716 C:\cygwin\bin\sh.exe: *** fatal error -
couldn't allocate heap, Win32 error 487, base 0x850000, top 0x890000,
reserve_size 258048, allocsize 262144, page_const 4096
      2 [main] sh 10172 fork: child -1 - died waiting for longjmp
before initialization, retry 0, exit code 0x100, errno 11
      3 [main] sh 10996 C:\cygwin\bin\sh.exe: *** fatal error -
couldn't allocate heap, Win32 error 487, base 0x850000, top 0x890000,
reserve_size 258048, allocsize 262144, page_const 4096
4773696 [main] sh 10172 fork: child -1 - died waiting for longjmp
before initialization, retry 0, exit code 0x100, errno 11
      3 [main] sh 11444 C:\cygwin\bin\sh.exe: *** fatal error -
couldn't allocate heap, Win32 error 487, base 0x850000, top 0x890000,
reserve_size 258048, allocsize 262144, page_const 4096
10532501 [main] sh 10172 fork: child -1 - died waiting for longjmp
before initialization, retry 0, exit code 0x100, errno 11
      3 [main] sh 8728 C:\cygwin\bin\sh.exe: *** fatal error -
couldn't allocate heap, Win32 error 487, base 0x850000, top 0x890000,
reserve_size 258048, allocsize 262144, page_const 4096
18305408 [main] sh 10172 fork: child -1 - died waiting for longjmp
before initialization, retry 0, exit code 0x100, errno 11
      3 [main] sh 9872 C:\cygwin\bin\sh.exe: *** fatal error -
couldn't allocate heap, Win32 error 487, base 0x850000, top 0x890000,
reserve_size 258048, allocsize 262144, page_const 4096
30064112 [main] sh 10172 fork: child -1 - died waiting for longjmp
before initialization, retry 0, exit code 0x100, errno 11
sh: fork: Resource temporarily unavailable
%

perlscript just spawns shells using backticks to run some curl commands.

There are a lot of posts from different times with similar problems. I
already tried rebaseall (and peflagsall). Also, I fiddled with
theheap_chunk_in_mb registry entry. No success so far. I reinstalled
cygwin from scratch -- same problem.

The error comes from perl and make scripts, mostly. Any ideas?

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