From 34533e06a7b6f73bb9cf16058207e97bd91c832c Mon Sep 17 00:00:00 2001
From: janekptacijarabaci <janekptacijarabaci@seznam.cz>
Date: Sun, 25 Mar 2018 12:38:28 +0200
Subject: Bug 1332881 - Handle stack value in correct order when leaving loop
 and try-finally

Issue #74
---
 js/src/frontend/BytecodeEmitter.cpp                |  6 +++
 js/src/tests/ecma_6/Statements/for-inof-finally.js | 54 ++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 js/src/tests/ecma_6/Statements/for-inof-finally.js

diff --git a/js/src/frontend/BytecodeEmitter.cpp b/js/src/frontend/BytecodeEmitter.cpp
index 98679eac6..bf7797d37 100644
--- a/js/src/frontend/BytecodeEmitter.cpp
+++ b/js/src/frontend/BytecodeEmitter.cpp
@@ -2359,6 +2359,9 @@ NonLocalExitControl::prepareForNonLocalJump(BytecodeEmitter::NestableControl* ta
           }
 
           case StatementKind::ForOfLoop:
+            if (!flushPops(bce_))
+                return false;
+
             // The iterator and the current value are on the stack.
             //
             if (emitIteratorClose) {
@@ -2378,6 +2381,9 @@ NonLocalExitControl::prepareForNonLocalJump(BytecodeEmitter::NestableControl* ta
             break;
 
           case StatementKind::ForInLoop:
+            if (!flushPops(bce_))
+                return false;
+
             // The iterator and the current value are on the stack.
             if (!bce_->emit1(JSOP_POP))                   // ... ITER
                 return false;
diff --git a/js/src/tests/ecma_6/Statements/for-inof-finally.js b/js/src/tests/ecma_6/Statements/for-inof-finally.js
new file mode 100644
index 000000000..187dcdaf5
--- /dev/null
+++ b/js/src/tests/ecma_6/Statements/for-inof-finally.js
@@ -0,0 +1,54 @@
+var BUGNUMBER = 1332881;
+var summary =
+  "Leaving for-in and try should handle stack value in correct order";
+
+print(BUGNUMBER + ": " + summary);
+
+var a = (function () {
+    for (var x in [0]) {
+        try {} finally {
+            return 11;
+        }
+    }
+})();
+assertEq(a, 11);
+
+var b = (function () {
+    for (var x of [0]) {
+        try {} finally {
+            return 12;
+        }
+    }
+})();
+assertEq(b, 12);
+
+var c = (function () {
+    for (var x in [0]) {
+        for (var y of [0]) {
+            try {} finally {
+                return 13;
+            }
+        }
+    }
+})();
+assertEq(c, 13);
+
+var d = (function () {
+    for (var x in [0]) {
+        for (var y of [0]) {
+            try {} finally {
+                for (var z in [0]) {
+                    for (var w of [0]) {
+                        try {} finally {
+                            return 14;
+                        }
+                    }
+                }
+            }
+        }
+    }
+})();
+assertEq(d, 14);
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
-- 
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