1 files changed, 11 insertions, 1 deletions
diff --git a/src/interp/routines/execute.c b/src/interp/routines/execute.c
index fe1e8d7..d04363e 100644
--- a/src/interp/routines/execute.c
+++ b/src/interp/routines/execute.c
@@ -33,7 +33,17 @@ static enum nw_state repeat(struct nw_interp *const i)
     struct nw_next *const next = &b->next;
     const enum nw_state n = next->fn(next->user, next);
 
-    if (n)
+    if (n == NW_FATAL)
+    {
+        static const char *const exc = "pc callback failed";
+
+        i->exception = exc;
+#ifdef NW_LOG
+        nwp_log("%s, pc: %ld\n", exc, b->pc);
+#endif
+        return NW_FATAL;
+    }
+    else if (n)
         return n;
 
     return execute(i);