IIFE function expression incorrectly deparenthesized when preceded by pure annotation

[mbrock]

I'm testing with esbuild 0.6.2.

The source file

/* @__PURE__ */ (function () {})()

gives the output

/* @__PURE__ */ function() {
}();

when compiled with no options. This output is not valid JavaScript: it reads as a function declaration with no name.

[mbrock]

With another kind of preserved comment, the expression stays parenthesized:

/* @license */
(function() {
})();

[mbrock]

The issue first appears in 0.5.22 when the support for pure annotations was added.

This kind of code is present in the RxJS compiled source, so I can't use RxJS with newer versions of esbuild, hence my report.

[evanw]

Thanks so much for reporting this. Makes sense why this broke. Sorry I didn't catch it. The fix is in version 0.6.3.

[mbrock]

@evanw Amazing, thanks!