thread.c: no allocation during GC

* thread.c (ruby_thread_stack_overflow): jump without setting up
  the exception not to allocate new objects, during GC.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48911 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 3 deletions

diff --git a/thread.c b/thread.c
index eb9b27f3d6..25e36f25fb 100644
--- a/thread.c
+++ b/thread.c
@@ -2080,11 +2080,12 @@ ruby_thread_stack_overflow(rb_thread_t *th)
 {
     th->raised_flag = 0;
 #ifdef USE_SIGALTSTACK
-    rb_exc_raise(sysstack_error);
-#else
+    if (!rb_during_gc()) {
+	rb_exc_raise(sysstack_error);
+    }
+#endif
     th->errinfo = sysstack_error;
     TH_JUMP_TAG(th, TAG_RAISE);
-#endif
 }
 
 int