1 files changed, 3 insertions, 1 deletions
diff --git a/mfd/prog.c b/mfd/prog.c
index 17c2464b..a2671db8 100644
--- a/mfd/prog.c
+++ b/mfd/prog.c
@@ -492,3 +492,5 @@ runtime_stack_trace(eval_environ_t env)
 		struct locus *ploc = NULL, loc;
-		
+
+		if (pc < 2)
+			break; /*FIXME*/
 		if (prog[pc-2] == instr_funcall) {