TS4029 error case

_ts4029_error_case

$ sh ./run.sh 
ts4029.ts(5,2): error TS4029: Public property 'mod' of exported class has or is using name '' from external module "mod" but cannot be named.
ts4029-another-variable.ts(6,2): error TS4029: Public property 'mod2' of exported class has or is using name '' from external module "mod" but cannot be named.

mod.ts

export var PI = 3.14;

run.sh

tsc --module commonjs -d ts4029.ts # bad
tsc --module commonjs ts4029.ts # ok
tsc --module commonjs -d ts4029-static_ok.ts # ok
tsc --module commonjs -d ts4029-another-variable_ok.ts # ok
tsc --module commonjs -d ts4029-another-variable.ts # bad
tsc --module commonjs -d ts4029-non-export_ok.ts # ok

ts4029-another-variable.ts

import mod = require("mod");

export = Hoge;
class Hoge{
	mod;
	mod2 = mod;
}

ts4029-another-variable_ok.ts

import mod = require("mod");

export = Hoge;
class Hoge{
	mod2 = mod;
}

ts4029-non-export_ok.ts

import mod = require("mod");

class Hoge{
	mod = mod;
}

ts4029-static_ok.ts

export = Hoge;

import mod = require("mod");

class Hoge{
	static mod = mod;
}

ts4029.ts

import mod = require("mod");

export = Hoge;
class Hoge{
	mod = mod;
}