Process source maps in Rust instead of JS (#1280)

- Improves speed and binary size significantly.
- Makes deno_last_exception() output a JSON structure.
- Isolate::execute and Isolate::event_loop now return
  structured, mapped JSError objects on errors.
- Removes libdeno functions:
  libdeno.setGlobalErrorHandler()
  libdeno.setPromiseRejectHandler()
  libdeno.setPromiseErrorExaminer()

In collaboration with Ryan Dahl.

1 files changed, 0 insertions, 50 deletions

diff --git a/js/promise_util.ts b/js/promise_util.ts
deleted file mode 100644
index 3c789124d..000000000
--- a/js/promise_util.ts
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2018 the Deno authors. All rights reserved. MIT license.
-import { PromiseRejectEvent } from "./libdeno";
-
-/* tslint:disable-next-line:no-any */
-const rejectMap = new Map<Promise<any>, string>();
-// For uncaught promise rejection errors
-
-/* tslint:disable-next-line:no-any */
-const otherErrorMap = new Map<Promise<any>, string>();
-// For reject after resolve / resolve after resolve errors
-
-export function promiseRejectHandler(
-  error: Error | string,
-  event: PromiseRejectEvent,
-  /* tslint:disable-next-line:no-any */
-  promise: Promise<any>
-) {
-  switch (event) {
-    case "RejectWithNoHandler":
-      rejectMap.set(promise, (error as Error).stack || "RejectWithNoHandler");
-      break;
-    case "HandlerAddedAfterReject":
-      rejectMap.delete(promise);
-      break;
-    case "ResolveAfterResolved":
-      // Should not warn. See #1272
-      break;
-    default:
-      // error is string here
-      otherErrorMap.set(promise, `Promise warning: ${error as string}`);
-  }
-}
-
-// Return true when continue, false to die on uncaught promise reject
-export function promiseErrorExaminer(): boolean {
-  if (otherErrorMap.size > 0) {
-    for (const msg of otherErrorMap.values()) {
-      console.log(msg);
-    }
-    otherErrorMap.clear();
-  }
-  if (rejectMap.size > 0) {
-    for (const msg of rejectMap.values()) {
-      console.log(msg);
-    }
-    rejectMap.clear();
-    return false;
-  }
-  return true;
-}