Description of problem:

Gcc-11.0-12 seems to crash while Gcc-11.0-11 is working:

In file included from Unified_cpp_js_src_debugger0.cpp:29:
/builddir/build/BUILD/firefox-84.0.2/js/src/debugger/Environment.cpp: In member function 'bool js::DebuggerEnvironment::CallData::typeGetter()':
/builddir/build/BUILD/firefox-84.0.2/js/src/debugger/Environment.cpp:193:24: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
  193 |   JSAtom* str = Atomize(cx, s, strlen(s), PinAtom);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
'
*** WARNING *** there are active plugins, do not report this as a bug unless you can reproduce it without enabling any plugins.
Event                            | Plugins
PLUGIN_FINISH_UNIT               | annobin: Generate final annotations
PLUGIN_START_UNIT                | annobin: Generate global annotations
PLUGIN_ALL_PASSES_START          | annobin: Generate per-function annotations
PLUGIN_ALL_PASSES_END            | annobin: Register per-function end symbols
during GIMPLE pass: uninit
In file included from Unified_cpp_js_src_debugger0.cpp:11:
In member function 'bool js::Debugger::CallData::findAllGlobals()':
Segmentation fault
 5889 | bool Debugger::CallData::findAllGlobals() {
      |      ^~~~~~~~
0x15ff5c9 diagnostic_impl(rich_location*, diagnostic_metadata const*, int, char const*, __va_list_tag (*) [1], diagnostic_t)
	???:0
0xfc93b7 internal_error(char const*, ...)
	???:0
0x937254 crash_signal(int)
	???:0
0x71efe9 print_mem_ref(c_pretty_printer*, tree_node*)
	???:0
0x658dec dump_expr(cxx_pretty_printer*, tree_node*, int) [clone .constprop.0] [clone .cold]
	???:0
0x658ac2 expr_to_string(tree_node*)
	???:0
0x6585c2 cp_printer(pretty_printer*, text_info*, char const*, int, bool, bool, bool, bool*, char const**) [clone .cold]
	???:0
0x1601da0 pp_format(pretty_printer*, text_info*)
	???:0
0x1401e43 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
	???:0
0x14022cc warning_at(unsigned int, int, char const*, ...)
	???:0
0x12bf475 warn_uninit(opt_code, tree_node*, tree_node*, tree_node*, char const*, void*, unsigned int)
	???:0
0x9ec123 (anonymous namespace)::pass_late_warn_uninitialized::execute(function*) [clone .cold]
	???:0
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
Preprocessed source stored into /tmp/ccjf0j70.out file, please attach this to your bugreport.
make[1]: *** [/builddir/build/BUILD/firefox-84.0.2/config/rules.mk:676: Unified_cpp_js_src_debugger0.o] Error 1
make[1]: Leaving directory '/builddir/build/BUILD/firefox-84.0.2/objdir/js/src/debugger'
make: *** [/builddir/build/BUILD/firefox-84.0.2/config/recurse.mk:72: js/src/debugger/target-objects] Error 2
make: Leaving directory '/builddir/build/BUILD/firefox-84.0.2/objdir'
error: Bad exit status from /var/tmp/rpm-tmp.5PEJXC (%build)


Build:
https://koji.fedoraproject.org/koji/taskinfo?taskID=59514186