Created attachment 1023175 [details]
Workaround

Description of problem:
firefox fails to build on s390

Version-Release number of selected component (if applicable):
firefox-38.0-1.fc22/firefox-37.0.2-2.fc22

How reproducible:
Always

Steps to Reproduce:
1.build firefox

Actual results:
.
.
.
/builddir/build/BUILD/firefox-38.0/mozilla-release/objdir/_virtualenv/bin/python /builddir/build/BUILD/firefox-38.0/mozilla-release/toolkit/mozapps/installer/packager.py -DMOZ_GLUE_IN_PROGRAM -DAB_CD=en-US -DNO_NSPR_10_SUPPORT -DMOZ_APP_NAME=firefox -DPREF_DIR=defaults/preferences -DMOZ_ENABLE_GNOME_COMPONENT=1 -DMOZ_GTK=1 -DMOZ_GTK3=1 -DMOZ_NATIVE_NSPR=1 -DMOZ_NATIVE_NSS=1 -DJAREXT= -DMOZ_CHILD_PROCESS_NAME=plugin-container -DNECKO_WIFI -DDLL_PREFIX=lib -DDLL_SUFFIX=.so -DBIN_SUFFIX= -DDIR_MACOS= -DDIR_RESOURCES= -DBINPATH=bin -DRESPATH=bin -DAB=en -DMOZ_ICU_VERSION=52 -DMOZ_NATIVE_ICU -DMOZ_SHARED_ICU -DMOZ_ICU_DBG_SUFFIX= \
	--format omni \
	--removals /builddir/build/BUILD/firefox-38.0/mozilla-release/browser/installer/removed-files.in \
	 \
	 \
	 \
	 \
	--optimizejars \
	 \
	package-manifest ../../dist ../../dist/firefox \
	
Executing /builddir/build/BUILD/firefox-38.0/mozilla-release/objdir/dist/bin/xpcshell -g /builddir/build/BUILD/firefox-38.0/mozilla-release/objdir/dist/bin/ -a /builddir/build/BUILD/firefox-38.0/mozilla-release/objdir/dist/bin/ -f /builddir/build/BUILD/firefox-38.0/mozilla-release/toolkit/mozapps/installer/precompile_cache.js -e precompile_startupcache("resource://gre/");
self-hosted:16:0 InternalError: function nested too deeply:
self-hosted:16:0 }
self-hosted:16:0 ^
Traceback (most recent call last):
  File "/builddir/build/BUILD/firefox-38.0/mozilla-release/toolkit/mozapps/installer/packager.py", line 403, in <module>
    main()
  File "/builddir/build/BUILD/firefox-38.0/mozilla-release/toolkit/mozapps/installer/packager.py", line 397, in main
    args.source, gre_path, base)
  File "/builddir/build/BUILD/firefox-38.0/mozilla-release/toolkit/mozapps/installer/packager.py", line 156, in precompile_cache
    errors.fatal('Error while running startup cache precompilation')
  File "/builddir/build/BUILD/firefox-38.0/mozilla-release/python/mozbuild/mozpack/errors.py", line 101, in fatal
    self._handle(self.FATAL, msg)
  File "/builddir/build/BUILD/firefox-38.0/mozilla-release/python/mozbuild/mozpack/errors.py", line 96, in _handle
    raise ErrorMessage(msg)
mozpack.errors.ErrorMessage: Error: Error while running startup cache precompilation
/builddir/build/BUILD/firefox-38.0/mozilla-release/toolkit/mozapps/installer/packager.mk:36: recipe for target 'stage-package' failed
make[1]: *** [stage-package] Error 1
make[1]: Leaving directory '/builddir/build/BUILD/firefox-38.0/mozilla-release/objdir/browser/installer'
/builddir/build/BUILD/firefox-38.0/mozilla-release/browser/build.mk:21: recipe for target 'install' failed
make: *** [install] Error 2
make: Leaving directory '/builddir/build/BUILD/firefox-38.0/mozilla-release/objdir'
error: Bad exit status from /var/tmp/rpm-tmp.L84W0m (%install)
RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.L84W0m (%install)
Child return code was: 1
EXCEPTION: Command failed. See logs for output.
 # bash --login -c /usr/bin/rpmbuild -bb --target s390 --nodeps  /builddir/build/SPECS/firefox.spec 
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/mockbuild/trace_decorator.py", line 84, in trace
    result = func(*args, **kw)
  File "/usr/lib/python2.7/site-packages/mockbuild/util.py", line 504, in do
    raise exception.Error("Command failed. See logs for output.\n # %s" % (command,), child.returncode)
Error: Command failed. See logs for output.
 # bash --login -c /usr/bin/rpmbuild -bb --target s390 --nodeps  /builddir/build/SPECS/firefox.spec 
LEAVE do --> EXCEPTION RAISED

failed build: http://s390.koji.fedoraproject.org/koji/buildinfo?buildID=313918

Expected results:
firefox builds

Additional info:
Lowering -O level in js seems to workaround this bug(scratch build http://s390.koji.fedoraproject.org/koji/taskinfo?taskID=1788785 with patch in attachment). Seems as it could be gcc related(FF37 builds for f21). Will investigate further.