why not tip some runtime error?

[qidizi]

write some code like that?

var s = new Function('', 'var f = function(){noFunc();};try{f.apply(this,arguments);}catch(e){console.log(f+"runtime error",e)}');
console.log(s,s())

        return new Function(c.varname, 'var func=function('+c.varname+'){' +str+ '};try{return func.apply(this,arguments);}catch(e){if (window.console && console.log)console.log(func+" runtime error:",e,"the arguments is:",arguments); else alert(func+" runtime error:"+e); return "temp runtime error!";}');

[milichev]

You can safely decorate your template function with a try-catch wrapper function.

[epoberezkin]

@qidizi closing the issue.
I think it is a duplicate of #56, #122, etc.
If what you want is to log error instead of throwing exception, you just need to wrap template compilation in try/catch in your code, although usually exception is better.
Please reopen if the issue is different/unanswered.