From 723a8bd3ac899b5f2399370f11669bd79a257d7d Mon Sep 17 00:00:00 2001
From: Lucas Mirelmann <lgalfaso@gmail.com>
Date: Sat, 16 Apr 2016 20:17:22 +0200
Subject: [PATCH] fix($parse): Handle sign of `-undefined` consistently

When csp is disabled, evaluating `-undefined` is `-0` and when csp is enabled
the evaluation is `0`. In most cases this is not an issue as `0 === -0`, but
there is an edge case as `1/0 === Infinity` and `1/-0 === -Infinity`
---
 src/ng/parse.js      | 2 +-
 test/ng/parseSpec.js | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/ng/parse.js b/src/ng/parse.js
index 8f5922db5705..4a310dc1cee7 100644
--- a/src/ng/parse.js
+++ b/src/ng/parse.js
@@ -1516,7 +1516,7 @@ ASTInterpreter.prototype = {
       if (isDefined(arg)) {
         arg = -arg;
       } else {
-        arg = 0;
+        arg = -0;
       }
       return context ? {value: arg} : arg;
     };
diff --git a/test/ng/parseSpec.js b/test/ng/parseSpec.js
index eea0b361c57c..8e383ab6d761 100644
--- a/test/ng/parseSpec.js
+++ b/test/ng/parseSpec.js
@@ -1755,7 +1755,7 @@ describe('parser', function() {
         expect(scope.$eval("+'1'")).toEqual(+'1');
         expect(scope.$eval("-'1'")).toEqual(-'1');
         expect(scope.$eval("+undefined")).toEqual(0);
-        expect(scope.$eval("-undefined")).toBe(0);
+        expect(scope.$eval("-undefined")).toEqual(-0);
         expect(scope.$eval("+null")).toEqual(+null);
         expect(scope.$eval("-null")).toEqual(-null);
         expect(scope.$eval("+false")).toEqual(+false);