michael@0: try{} catch (x) {}
michael@0: 
michael@0: var callStack = [];
michael@0: function currentFunc() {
michael@0:     return callStack[0];
michael@0: }
michael@0: function reportFailure () {
michael@0:     var funcName = currentFunc();
michael@0:     // play with the result to cause a SEGV.
michael@0:     var prefix = (funcName) ? funcName : "";
michael@0:     // Use OSR to compile the function at the end of the first run.
michael@0:     for (var i=0; i < 50; i++) ;
michael@0: }
michael@0: 
michael@0: callStack[0] = 'test';
michael@0: // Run and compile with a string as result of currentFunc.
michael@0: reportFailure();
michael@0: callStack[0] = undefined;
michael@0: // Use previously compiled code with the string assumption.
michael@0: reportFailure();