From 327245dfe20d45cf6782d8e4ca53fe1f86abd6a9 Mon Sep 17 00:00:00 2001
From: Alon Zakai <alonzakai@gmail.com>
Date: Wed, 6 Feb 2019 12:57:29 -0800
Subject: throw an early error in s-expr-parsing makeBlock, if not inside a
 function (#1894)

Fixes #1893
---
 src/wasm/wasm-s-parser.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/wasm/wasm-s-parser.cpp')

diff --git a/src/wasm/wasm-s-parser.cpp b/src/wasm/wasm-s-parser.cpp
index 09cc044bf..d7b3824a9 100644
--- a/src/wasm/wasm-s-parser.cpp
+++ b/src/wasm/wasm-s-parser.cpp
@@ -786,6 +786,7 @@ Expression* SExpressionWasmBuilder::makeSetGlobal(Element& s) {
 
 
 Expression* SExpressionWasmBuilder::makeBlock(Element& s) {
+  if (!currFunction) throw ParseException("block is unallowed outside of functions");
   // special-case Block, because Block nesting (in their first element) can be incredibly deep
   auto curr = allocator.alloc<Block>();
   auto* sp = &s;
-- 
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