795726 - src/jsobj.h:1029:30: warning: inline function ‘js::StringObject& JSObject::asString()’ used but never defined [enabled by default]

Status: RESOLVED DUPLICATE of bug 795765

(Core :: JavaScript Engine, defect)

Description

[Daniel Holbert [:dholbert]]

Filing bug on build warning:
{
In file included from ../../../mozilla/js/src/jsfun.h:14:0,
                 from ../../../mozilla/js/src/vm/Stack.h:11,
                 from ../../../mozilla/js/src/jscntxt.h:33,
                 from ../../../mozilla/js/src/ion/MIR.h:14,
                 from ../../../mozilla/js/src/ion/IonBuilder.h:14,
                 from ../../../mozilla/js/src/ion/MIR.cpp:8:
../../../mozilla/js/src/jsobj.h:1029:30: warning: inline function ‘js::StringObject& JSObject::asString()’ used but never defined [enabled by default]
}

I'm getting lots of instances of this build warning (tens of instances, at least) -- once per file that includes jsobj.h, probably.

The method is declared here:
https://mxr.mozilla.org/mozilla-central/source/js/src/jsobj.h?rev=a0853ae2ee0f
and it looks like it's defined here:
https://mxr.mozilla.org/mozilla-central/source/js/src/vm/StringObject-inl.h?rev=f27c74c5ac80

In a lot of the cases, it looks like it's from things including "MIR.h", which has a call to asString():
https://mxr.mozilla.org/mozilla-central/source/js/src/ion/MIR.h?rev=b6a9cb1be492#5315
... but MIR.h does not include the header with asString()'s definition.

Tentatively assuming that's the issue behind most of these patches.  --> tagging bug 794475 (which added that asString() call in MIR.h) as having caused this.