Bug 244018 – 'a\n' is considered as a variable

• Status: NEW
• Component: JavaScriptCore

Run the program:
var a=1;
a
();

JSC:
TypeError:a
 is not a function

V8 & SpiderMonkey:
TypeError:a is not a function

In the error message,'a/n' is output as the variable name but the really variable name is 'a'.I think it may be a bug.

[Karl Dubost]

Safari, Firefox and Chrome return the same error message.

[Karl Dubost]

but indeed Firefox and Chrome normalizes the output to avoid the return.

[Karl Dubost]

Full Safari output

```
TypeError: a
 is not a function. (In 'a
()', 'a
' is 1)
```

I wonder if it would be better to actually shows the output as:

```
TypeError: a\n is not a function. (In 'a\n()', 'a\n' is 1)
```

'\n' is illegal in variable name and function name.'var a\nb=1' will throw a SyntaxError.So print 'TypeError: a\n is not a function.' may be not a good idea.It regard 'a\n' as a variable name.

But '\n' is meaningless in the end of variable name and function name and will be ignored.

If running the following program:
var a
=1;
print(a);
print(a
);
a=2;
print(a);
print(a
);

It output:
1
1
2
2

So during compilation,'\n' in the end of variable name and function name will be ignored.The '\n' of variable name 'a\n' will be ignored and 'a\n' is regarded as 'a'.

I think 'TypeError:a is not a function' is better.

[Karl Dubost]

Yes agreed. 
But how do we help the developer to discover the error. :) That's where I was coming from.

All I know is that I can report the bug in this website.Isn't it the bug tracking system for JSC?

[Radar WebKit Bug Importer]

<rdar://problem/99064631>