nodejs
diff --git a/Collapse file
‎lib/util.js‎
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+11Lines changed: 11 additions & 0 deletions b/Collapse file
‎lib/util.js‎
Copy file name to clipboardExpand all lines: lib/util.js
+11Lines changed: 11 additions & 0 deletions
diff --git a/Collapse file
‎test/parallel/test-util-decorate-error-stack.js‎
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+35Lines changed: 35 additions & 0 deletions b/Collapse file
‎test/parallel/test-util-decorate-error-stack.js‎
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+35Lines changed: 35 additions & 0 deletions
@@ -883,3 +883,14 @@ exports._exceptionWithHostPort = function(err,
   }
   return ex;
 };
+
+
+exports.decorateErrorStack = function(err) {
+  if (!(isError(err) && err.stack))
+    return;
+
+  const arrow = internalUtil.getHiddenValue(err, 'arrowMessage');
+
+  if (arrow)
+    err.stack = arrow + err.stack;
+};
@@ -0,0 +1,35 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const util = require('util');
+
+assert.doesNotThrow(function() {
+  util.decorateErrorStack();
+  util.decorateErrorStack(null);
+  util.decorateErrorStack(1);
+  util.decorateErrorStack(true);
+});
+
+// Verify that a stack property is not added to non-Errors
+const obj = {};
+util.decorateErrorStack(obj);
+assert.strictEqual(obj.stack, undefined);
+
+// Verify that the stack is decorated when possible
+let err;
+
+try {
+  require('../fixtures/syntax/bad_syntax');
+} catch (e) {
+  err = e;
+  assert(!/var foo bar;/.test(err.stack));
+  util.decorateErrorStack(err);
+}
+
+assert(/var foo bar;/.test(err.stack));
+
+// Verify that the stack is unchanged when there is no arrow message
+err = new Error('foo');
+const originalStack = err.stack;
+util.decorateErrorStack(err);
+assert.strictEqual(originalStack, err.stack);