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Bug 496270: correct use of C++ reference returned from function, r=gal

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This commit is contained in:
David Mandelin 2009-06-05 16:19:06 -07:00
parent 05f8dc2692
commit 1e04a40929
1 changed files with 8 additions and 3 deletions
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11
js/src/jstracer.cpp
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@ -8483,10 +8483,15 @@ JS_REQUIRES_STACK LIns*
TraceRecorder::upvar(JSScript* script, JSUpvarArray* uva, uintN index, jsval& v)
{
/*
* Try to find the upvar in the current trace's tracker.
* Try to find the upvar in the current trace's tracker. For &vr to be
* the address of the jsval found in js_GetUpvar, we must initialize
* vr directly with the result, so it is a reference to the same location.
* It does not work to assign the result to v, because v is an already
* existing reference that points to something else.
*/
v = js_GetUpvar(cx, script->staticLevel, uva->vector[index]);
LIns* upvar_ins = get(&v);
jsval& vr = js_GetUpvar(cx, script->staticLevel, uva->vector[index]);
v = vr;
LIns* upvar_ins = get(&vr);
if (upvar_ins) {
return upvar_ins;
}