fail to run js code

[hellodword]

Thanks for your work!

When I tried to run a piece of code, I got SyntaxError: Identifier 'a' has already been declared.

And I tried all ecmaVer.

Here is the code: jsbin

[Siubaak]

Could you offer the source code for debug? It's hard to figure out what problem is with an uglify code.

[hellodword]

I'm so sorry but I was trying to solve obfuscated code with sval, I do not have the raw source code.

[Llorx]

I'm so sorry but I was trying to solve obfuscated code with sval, I do not have the raw source code.

At least you can try to pretty-print it...

The problem is in the _k function:

var variables should be able to be redefined. let and const are the ones not allowed to be redefined. I don't know if that's something about strict mode also.

[Siubaak]

@hellodword fixed in 0.4.7

[hellodword]

fixed in 0.4.7

Here is the code: jsbin

With the same obfuscated code, it shows "ReferenceError: _g is not defined" now.

Looked into and I found the issue is in the _q or eval function, here is a small poc, which is fine in the chrome dev console:

(function() {

    function _j(a) {
        eval(a)
    }

    function _g(d) {
        this.chars && console.log(this.chars);
    }

    function _q(a, b, c) {
        return a.apply(b, Array.prototype.slice.call(arguments, 2))
    }

    $c = this;

    // success
    _g.call({chars: "hello!"},"");

    var jscode = '_g.call({chars: "hello!"},"");';

    // fail
    _j(jscode);

    // fail
    _q(_j, $c, jscode);

})();

[Siubaak]

eval in sval is from your env, and it won't share the same ctx with sval instance., so avoid to use eval to execute the code relied on you sval instance ctx.

Maybe I should take eval out of sval instance scope...

[Llorx]

Maybe there's a chance to catch eval calls and run them though sval.