incorrect name mappings: last name index is used for unrelated entries

[develar]

IntelliJ IDEA supports name mappings and currently typescript compiler produces incorrect name mappings (https://youtrack.jetbrains.com/issue/WEB-17717).

Typescript code:

class Foo {
    public b = 3;
    bar(param1){
        var a = 5;
        return a;
    }
}

new Foo().bar(1);

Debug output: https://gist.github.com/develar/598a984f27bb92526094

Project to get debug output: https://dl.dropboxusercontent.com/u/43511007/s/ts-name-mappings-bug.zip

IDEA sourcemap visualiser:

[develar]

Is it known issue? Or was not yet investigated and pull request is welcome?

[sheetalkamat]

We have decided that we wont emit the names since the sourcemap spec is unclear of its use(#5713). Browser tools don't use it either. We would be waiting to hear about symbol translation and then get to this.

[develar]

@sheetalkamat Answered in the linked ticket. It is a wrong decision to drop name mappings generation.