1 files changed, 5 insertions, 2 deletions
diff --git a/gc.c b/gc.c
index 1b0f13efbb..fd30c75618 100644
--- a/gc.c
+++ b/gc.c
@@ -1925,8 +1925,11 @@ rb_objspace_set_event_hook(const rb_event_flag_t event)
 static void
 gc_event_hook_body(rb_execution_context_t *ec, rb_objspace_t *objspace, const rb_event_flag_t event, VALUE data)
 {
-    /* increment PC because source line is calculated with PC-1 */
-    const VALUE *pc = ec->cfp->pc++;
+    const VALUE *pc = ec->cfp->pc;
+    if (VM_FRAME_RUBYFRAME_P(ec->cfp)) {
+        /* increment PC because source line is calculated with PC-1 */
+        ec->cfp->pc++;
+    }
     EXEC_EVENT_HOOK(ec, event, ec->cfp->self, 0, 0, 0, data);
     ec->cfp->pc = pc;
 }