From 18e83cb152447a07fc0b3fe9c16b2b8c60aab328 Mon Sep 17 00:00:00 2001
From: "Alon Zakai (kripken)" <alonzakai@gmail.com>
Date: Mon, 29 May 2017 13:49:32 -0700
Subject: s-expr parsing: handle empty switch

---
 src/wasm/wasm-s-parser.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src')

diff --git a/src/wasm/wasm-s-parser.cpp b/src/wasm/wasm-s-parser.cpp
index 22dd36b13..77ca8910d 100644
--- a/src/wasm/wasm-s-parser.cpp
+++ b/src/wasm/wasm-s-parser.cpp
@@ -1340,6 +1340,7 @@ Expression* SExpressionWasmBuilder::makeBreakTable(Element& s) {
   while (!s[i]->isList()) {
     ret->targets.push_back(getLabel(*s[i++]));
   }
+  if (ret->targets.size() == 0) throw ParseException("switch with no targets");
   ret->default_ = ret->targets.back();
   ret->targets.pop_back();
   ret->condition = parseExpression(s[i++]);
-- 
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