rewrite setjmp code to identify, uniquely, each setjmp and match it to a longjmp. add testcase for #747, works in unoptimized builds

1 files changed, 2 insertions, 0 deletions

diff --git a/src/preamble.js b/src/preamble.js
index 9342bf2b..0917f977 100644
--- a/src/preamble.js
+++ b/src/preamble.js
@@ -276,6 +276,8 @@ Module['printProfiling'] = printProfiling;
 //========================================
 
 var __THREW__ = false; // Used in checking for thrown exceptions.
+var setjmpId = 1; // Used in setjmp/longjmp
+var setjmpLabels = {};
 
 var ABORT = false;