Uglifier::Error:

[cs0511]

Uglifier::Error:
from ****gems/uglifier-4.2.0/lib/uglifier.rb:291:in `parse_result'

To reproduce the error, just paste the code in your file and run Uglifier.new(harmony: true).compile(File.read("test.js"))

function f(){ return 1;};
var y = 42;

y = f();

const {p} = {p: 42};

But these code won't raise this error:

function f(){ return 1;};
var y = 42;

y = f();
console.log(123)
const {p} = {p: 42};

function f(){ return 1;};
var y = 42;
const {p} = {p: 42};
y = f();

Any one knows the reason? I am using uglifier (4.2.0)

[timminkov]

Getting the same error. Had to fork the gem, re-package the harmony branch of uglify, then copy it into the fork. Seems to be working now - not sure what the cause is.

[longpaid]

Getting the same error. Had to fork the gem, re-package the harmony branch of uglify, then copy it into the fork. Seems to be working now - not sure what the cause is.

had the same same issue, had to reference your version and it worked for me too, thank you 👍

[netelix]

Same issue...
I went back to Uglifier 4.1.0 in my Gemfile and it fixed it. Thanks for the tip

gem 'uglifier', '= 4.1.0'

[bsodmike]

Same issue...
I went back to Uglifier 4.1.0 in my Gemfile and it fixed it. Thanks for the tip

gem 'uglifier', '= 4.1.0'

Thanks so much. We spent two days tracing this down. 👀

[syntruth]

It's the de-structured assignment, somehow.

4.2.0 breaks on my code as well, on this line:

var [icon, title, typeClass] = this.__typeData(type)

If I use a traditional way of de-structuring my data -- or just comment out that line -- it uglifies just fine.

Thanks for the 4.1.0 tip; it saved me some headaches on the upcoming production push. :)

[rgaufman]

After trying to get this working with Uglifier, I ended up switching to Terser, more details here: #185