An issue about Immediately Invoked Function Expression

[NWU-NISL]

Description

As the following test case showed, there is a variable called v1 with the same name as the function. In this case, Hermes treats v1 as the variable whose value is 20. But other engines such as v8, spidermonkey, javascriptcore and chakra think that v1 is the function. Is this a normal behavior of the Hermes engine?

Testcase

(function v1(){
    v1 = 20;
    print(v1 !== 20);
    print(typeof v1);
}());

Version

9caeabc

Command

./build/bin/hermes -w testcase.js

Output

false
number

Expected Output

true
function

contributor:@QuXing9

[tmikov]

Thank you for reporting this! It is a known issue and we are working on it.