initialize runtime from run() (asynchronously, if run is asynchronous)

1 files changed, 5 insertions, 2 deletions

diff --git a/src/postamble.js b/src/postamble.js
index dd4f4f37..388d0127 100644
--- a/src/postamble.js
+++ b/src/postamble.js
@@ -51,6 +51,11 @@ Module.callMain = function callMain(args) {
 function run(args) {
   args = args || Module['arguments'];
 
+  if (!calledInit) {
+    initRuntime();
+    calledInit = true;
+  }
+
   if (runDependencies > 0) {
     Module.printErr('run() called, but dependencies remain, so not running');
     return 0;
@@ -112,8 +117,6 @@ if (Module['preInit']) {
   }
 }
 
-initRuntime();
-
 #if INVOKE_RUN
 var shouldRunNow = true;
 #else