Closed
Bug 403290
Opened 18 years ago
Closed 15 years ago
"WARNING: nsDOMClassInfo::GetProperty Don't call me!" with __proto__
Categories
(Core :: XPConnect, defect)
Tracking
()
RESOLVED
WORKSFORME
People
(Reporter: jruderman, Unassigned)
Details
(Keywords: testcase)
Attachments
(1 file)
156 bytes,
text/html
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Details |
WARNING: nsDOMClassInfo::GetProperty Don't call me!: file /Users/jruderman/trunk/mozilla/dom/src/base/nsDOMClassInfo.cpp, line 3701
This was turned from an assertion to a warning in bug 327571, but I can't trigger the warning with the testcase from that bug any more.
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Comment 1•18 years ago
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This is kinda fun. The proto chain here looks something like this:
A.__proto__ == B
B's class has a getProperty hook.
We do a property get on A, end up resolving the property on B, and call the getProperty hook for B's class, passing it A as the JSObject*.
This getProperty hook is XPC_WN_Helper_GetProperty. It assumes that since it got called the passed-in object had WantGetProperty() set, so it calls the scriptable helper GetProperty.
The problem is that WantGetProperty() was on B, but since A was passed to the hook we call A's scriptable helper, which doesn't expect to ever be called. Hence the warning.
This seems pretty bad to me; I think the scriptable helpers really do tend to assume that they get the JSObject for the right class, no?
Comment 2•17 years ago
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Would this and bug 311229 be duplicates ?
Reporter | ||
Comment 3•15 years ago
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WFM
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.3a5pre) Gecko/20100602 Minefield/3.7a5pre
Status: NEW → RESOLVED
Closed: 15 years ago
Resolution: --- → WORKSFORME
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Description
•