turn calls to undef into aborts, so they asmify

1 files changed, 1 insertions, 0 deletions

diff --git a/src/jsifier.js b/src/jsifier.js
index e7e4706b..18740e74 100644
--- a/src/jsifier.js
+++ b/src/jsifier.js
@@ -1321,6 +1321,7 @@ function JSify(data, functionsOnly, givenFunctions) {
     } else {
       callIdent = ident;
     }
+    if (callIdent == '0') return 'abort(-2)';
 
     var args = [];
     var argsTypes = [];