Javascriptのセミコロン

セミコロンなしだとエラー

$ sample.js
const a = 'foo' // Not semicolon

(async () => {
    console.log(a)
})();

$ node sample.js            
(async () => {
^

TypeError: "foo" is not a function
    at Object.<anonymous> (/home/tsaeki/Develop/test_azure_pipeline/test2.js:3:1)
    at Module._compile (internal/modules/cjs/loader.js:1085:14)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:76:12)
    at internal/main/run_main_module.js:17:47

セミコロンありはOK

$ sample_fix.js
const a = 'foo'; // Add semicolon

(async () => {
    console.log(a);
})();

$ node sample_fix.js
foo