From 61cdd06c68c967633d36fcb439f400929c2bcb42 Mon Sep 17 00:00:00 2001
From: Jehy <fate@jehy.ru>
Date: Tue, 2 Oct 2018 14:19:29 +0300
Subject: [PATCH] add stack trace for warnings
 https://github.com/petkaantonov/bluebird/issues/1552

---
 src/promise.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/promise.js b/src/promise.js
index 10dc52a40..87c3e2b02 100644
--- a/src/promise.js
+++ b/src/promise.js
@@ -121,6 +121,7 @@ Promise.prototype.then = function (didFulfill, didReject) {
         if (arguments.length > 1) {
             msg += ", " + util.classString(didReject);
         }
+        msg += new Error().stack;
         this._warn(msg);
     }
     return this._then(didFulfill, didReject, undefined, undefined, undefined);
@@ -158,7 +159,8 @@ Promise.prototype.toJSON = function () {
 
 Promise.prototype.all = function () {
     if (arguments.length > 0) {
-        this._warn(".all() was passed arguments but it does not take any");
+        this._warn(".all() was passed arguments but it does not take any "
+            + new Error().stack);
     }
     return new PromiseArray(this).promise();
 };
@@ -498,6 +500,7 @@ function(reason, synchronous, ignoreNonErrorWarnings) {
     if (!hasStack && !ignoreNonErrorWarnings && debug.warnings()) {
         var message = "a promise was rejected with a non-error: " +
             util.classString(reason);
+        message += new Error().stack;
         this._warn(message, true);
     }
     this._attachExtraTrace(trace, synchronous ? hasStack : false);