rem: delete F.prototype; 
add: try { delete F.prototype; } catch (e) { } 
context: function testDontDelete(F){  var orig = F.prototype;  delete F.prototype;  return F.prototype === orig;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/4218d0f5950d93cb2609d946f6af7ce1b2e89575/15.11.7.6-002.js/clean/js/tests/ecma_3/Exceptions/15.11.7.6-002.js