[Webkit-unassigned] [Bug 176685] New: Safari 10 /11 problem with if (!await get(something)).

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=176685

            Bug ID: 176685
           Summary: Safari 10 /11 problem with if (!await get(something)).
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Blocker
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: myfele at duck2.club

This code doesn't work in Safari (10 and 11, with Technology preview 39a), it blocks page rendering and says::

if(!await a(t, "myPromise").content) {
console.log('ByBye');
}

Of course if I remove await from my source code or check it like this:

if (myPromiseContent === 0) {

it works again.

But I can't use "!" with an await? Is it generally wrong? "eslint" doesn't warn me about this.

Am I wrong?

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