From 08bb521026aa55a085899ac25a652b341458f790 Mon Sep 17 00:00:00 2001
From: Brian Hackett <bhackett1024@gmail.com>
Date: Wed, 16 Mar 2011 15:56:43 -0700
Subject: [PATCH] [INFER] Compute PC for interpreted frames which failed to
 compile, bug 641225.

---
 js/src/methodjit/InvokeHelpers.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/js/src/methodjit/InvokeHelpers.cpp b/js/src/methodjit/InvokeHelpers.cpp
index 57232c12223..d7510bc86b0 100644
--- a/js/src/methodjit/InvokeHelpers.cpp
+++ b/js/src/methodjit/InvokeHelpers.cpp
@@ -336,6 +336,9 @@ stubs::CompileFunction(VMFrame &f, uint32 nactual)
     if (status == Compile_Okay)
         return script->getJIT(fp->isConstructing())->invokeEntry;
 
+    /* Force computation of the previous PC, as Interpret will clear it. */
+    fp->prev()->pc(cx, fp);
+
     /* Function did not compile... interpret it. */
     JSBool ok = Interpret(cx, fp);
     InlineReturn(f);