[Bug 21484] New: The "make -j2" invoked by chromium's webkit build aborts early?

http://bugs.winehq.org/show_bug.cgi?id=21484

Summary: The "make -j2" invoked by chromium's webkit build
                    aborts early?
           Product: Wine
           Version: 1.1.37
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Keywords: download
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

After working around bug 21174 with
  export NUMBER_OF_PROCESSORS_PLUS_1=2
the commands
  wget
http://code.google.com/p/winezeug/source/browse/trunk/testsuites/chromium/bu...
  sh build.sh build webcore_bindings_sources

failed in an interesting way: each time I ran it, a few more files
appear in C:/chromium/src/chrome/Debug/obj/global_intermedia/webkit/bindings.

I now use
  export NUMBER_OF_PROCESSORS_PLUS_1=1
which avoids the problem.

A slightly reduced testcase is
  sh build.sh cmd
  cd c:\chromium\src\third_party\WebKit\WebCore\WebCore.gyp
  call c:\chromium\src\third_party\cygwin\setup_env.bat
  set CYGWIN=nontsec
  bash -c "make OutDir=c:/chromium/src/chrome/Debug
IntDir=C:/chromium/src/chrome/Debug/obj/webcore_bindings_sources -j2 -f
webcore_bindings_sources_rules.mk"

That makefile invokes a python script which invokes a perl script. 
Evidently running that in parallel is too much for wine at the moment?