Firefox error's stack trace is unable to read Source Maps when output code is minified

[kamilogorek]

Repost from webpack-contrib/uglifyjs-webpack-plugin#266 as it's more appropriate to live here.

Working solution by @kzc available here webpack-contrib/uglifyjs-webpack-plugin#266 (comment)

[alexlamsl]

Please follow the issue template and provide useful information for this project in the future.

Closing as duplicate of #968

[kzc]

It's a source map issue for array and object literals unrelated to #968.

[alexlamsl]

@kzc I see - but this issue only affects harmony, right?

[kzc]

but this issue only affects harmony, right?

It happened to be discovered with uglify-es, but is equally applicable to master as well. Just remove the AST_Class from the patch and verify the resultant source map with https://sokra.github.io/source-map-visualization/