From 10401a9c64d32462574a1ea5096dc800da966f2f Mon Sep 17 00:00:00 2001
From: Jan de Mooij <jdemooij@mozilla.com>
Date: Tue, 18 Feb 2014 10:13:48 +0100
Subject: [PATCH] Bug 973574 - Fix AutoDebugModeInvalidation to not call
 FinishDiscardJitCode if it didn't discard JIT code. r=shu

---
 js/src/jit/Ion.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/js/src/jit/Ion.cpp b/js/src/jit/Ion.cpp
index 5df40c480e43..a5122976e31a 100644
--- a/js/src/jit/Ion.cpp
+++ b/js/src/jit/Ion.cpp
@@ -2879,7 +2879,9 @@ AutoDebugModeInvalidation::~AutoDebugModeInvalidation()
     if (comp_) {
         FinishDiscardJitCode(fop, comp_);
     } else {
-        for (CompartmentsInZoneIter comp(zone_); !comp.done(); comp.next())
-            FinishDiscardJitCode(fop, comp);
+        for (CompartmentsInZoneIter comp(zone_); !comp.done(); comp.next()) {
+            if (comp->principals)
+                FinishDiscardJitCode(fop, comp);
+        }
     }
 }