ruby_gc_stress    375 gc.c               ruby_gc_stress = ruby_initial_gc_stress;
ruby_gc_stress    467 gc.c               return ruby_gc_stress ? Qtrue : Qfalse;
ruby_gc_stress    487 gc.c               ruby_gc_stress = RTEST(bool);
ruby_gc_stress    620 gc.c               if ((ruby_gc_stress && !ruby_disable_gc_stress) ||
ruby_gc_stress    655 gc.c               if (ruby_gc_stress && !ruby_disable_gc_stress)
ruby_gc_stress    966 gc.c               if ((ruby_gc_stress && !ruby_disable_gc_stress) || !freelist) {