From 1e5479084bc9852854feb1ba9bf68b52cd127e02 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@artifex.com>
Date: Thu, 4 Apr 2019 12:03:02 +0200
Subject: [PATCH] Bug 700947: Add missing ENDTRY opcode in try/catch/finally
 byte code.

In one of the code branches in handling exceptions in the catch block
we forgot to call the ENDTRY opcode to pop the inner hidden try.
This leads to an unbalanced exception stack which can cause a crash
due to us jumping to a stack frame that has already been exited.
---
 jscompile.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/jscompile.c b/jscompile.c
index b37776b..a0b276a 100644
--- a/jscompile.c
+++ b/jscompile.c
@@ -1023,6 +1023,7 @@ static void ctrycatchfinally(JF, js_Ast *trystm, js_Ast *catchvar, js_Ast *catch
 		emitstring(J, F, OP_CATCH, catchvar->string);
 		cstm(J, F, catchstm);
 		emit(J, F, OP_ENDCATCH);
+		emit(J, F, OP_ENDTRY);
 		L3 = emitjump(J, F, OP_JUMP); /* skip past the try block to the finally block */
 	}
 	label(J, F, L1);