1 files changed, 5 insertions, 0 deletions
diff --git a/src/preamble.js b/src/preamble.js
index 25ef1fb3..5038e9c4 100644
--- a/src/preamble.js
+++ b/src/preamble.js
@@ -1027,6 +1027,11 @@ function preMain() {
 }
 
 function exitRuntime() {
+#if ASSERTIONS
+  if (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) {
+    Module.printErr('Exiting runtime. Any attempt to access the compiled C code may fail from now. If you want to keep the runtime alive, set Module["noExitRuntime"] = true or build with -s NO_EXIT_RUNTIME=1');
+  }
+#endif
   callRuntimeCallbacks(__ATEXIT__);
 }