288090 - report location information for unknown function errors in JS components

Status: RESOLVED INCOMPLETE

(Core :: JavaScript Engine, enhancement)

Description

[Darin Fisher]

report location information for unknown function errors

when an unknown function error occurs, JS_ReportErrorNumber prints out
"location: <unknown>" which isn't very helpful in tracking down the cause of the
problem.

shaver suggested over IRC that the code might be able to walk "backwards" to
look for some useful location information.

Comment 1

[Mike Shaver (:shaver emeritus)]

Specifically, we could walk the __parent__ chain for the object on which we're
trying to find the function, and inspect the global __LOCATION__ property.  We
could probably do something similar for content/chrome script as well, though
only the latter tends to be implementing interfaces with any interesting frequency.

Comment 2

[Mike Shaver (:shaver emeritus)]

Mass abdication.

Comment 3

[David Mandelin [:dmandelin]]

No clear STR here. If we had some, it looks like the kind of thing we'd want to fix, although I wouldn't be surprised if the original issue actually has been fixed.