The Tor Browser / file revision

 // Debugger.prototype.findScripts can find the innermost script at a given

 // source location.

 var g = newGlobal();

 var dbg = new Debugger();

 var gw = dbg.addDebuggee(g);

 function script(f) {

     return gw.makeDebuggeeValue(f).script;

 }

 function arrayIsOnly(array, element) {

     return array.length == 1 && array[0] === element;

 }

 url = scriptdir + 'Debugger-findScripts-14.script1';

 g.load(url);

 var scripts;

 // When we're doing 'innermost' queries, we don't have to worry about finding

 // random eval scripts: we should get exactly one script, for the function

 // covering that line.

 scripts = dbg.findScripts({url:url, line:4, innermost:true});

 assertEq(arrayIsOnly(scripts, script(g.f)), true);

 scripts = dbg.findScripts({url:url, line:6, innermost:true});

 assertEq(arrayIsOnly(scripts, script(g.f())), true);

 scripts = dbg.findScripts({url:url, line:8, innermost:true});

 assertEq(arrayIsOnly(scripts, script(g.f()())), true);