src: CancelTerminateExecution before throwing errors

Terminating the execution of a script would create a pending
exception, therefore we should cancel the termination
*before* throwing a new exception, otherwise the attempt to
create a custom error may fail.

PR-URL: #20146
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: joyeecheung

src/module_wrap.cc

@@ -279,7 +279,9 @@ void ModuleWrap::Evaluate(const FunctionCallbackInfo<Value>& args) {
     result = module->Evaluate(context);
   }
 
+  // Convert the termination exception into a regular exception.
   if (timed_out || received_signal) {
+    env->isolate()->CancelTerminateExecution();
     // It is possible that execution was terminated by another timeout in
     // which this timeout is nested, so check whether one of the watchdogs
     // from this invocation is responsible for termination.
@@ -288,7 +290,6 @@ void ModuleWrap::Evaluate(const FunctionCallbackInfo<Value>& args) {
     } else if (received_signal) {
       env->ThrowError("Script execution interrupted.");
     }
-    env->isolate()->CancelTerminateExecution();
   }
 
   if (try_catch.HasCaught()) {

src/node_contextify.cc

@@ -851,7 +851,9 @@ class ContextifyScript : public BaseObject {
       result = script->Run(env->context());
     }
 
+    // Convert the termination exception into a regular exception.
     if (timed_out || received_signal) {
+      env->isolate()->CancelTerminateExecution();
       // It is possible that execution was terminated by another timeout in
       // which this timeout is nested, so check whether one of the watchdogs
       // from this invocation is responsible for termination.
@@ -860,7 +862,6 @@ class ContextifyScript : public BaseObject {
       } else if (received_signal) {
         env->ThrowError("Script execution interrupted.");
       }
-      env->isolate()->CancelTerminateExecution();
     }
 
     if (try_catch.HasCaught()) {