Bug 35282 – Old catch-clause scoping bug still unfixed

• Status: RESOLVED
• Resolution: INVALID
• Component: JavaScriptCore

[Mark S. Miller]

The old ES3 behavior

function foo(){this.x = 11;}
var x = 'bar';
try { throw foo; } catch(e) { e(); print(x); }
// prints 11

is still present, despite 1) violating ES5 semantics, and 2) fatally violates ES5-strict semantics, as much of the motivation of ES5-strict is static scoping. This catch bug prevents static scoping.

[Mark S. Miller]

Oops. Thanks to Brendan for the correction. I was thinking about the code example in a nested scope as follows, but I hadn't tested that way. Tested nested, it
works fine. Sorry for the misunderstanding.

(function(){
  function foo(){this.x = 11;}
  var x = 'bar';
  try { throw foo; } catch(e) { e(); print(x); }
})();
// prints bar