Compiler bug in Xcode 10.2 for Enums with Associated Values

ullstrm · 2019-03-28T13:58:17.166Z

Basically this code produces very odd results in release builds with [-O] Optimization Level. (See attached screenshot).

gist.github.com

https://gist.github.com/ullstrm/8894f52c30e6eb858c208ebcfaf7f77c

IMG_1855750×1334 29.3 KB

My bet is that it has something to do with the new "@unknown default" since it works with a custom Enum as Associated Value.

I will file a bug for this! Sorry if this post is unnecessary.

suyashsrijan · 2019-03-28T20:00:01.013Z

I can reproduce this with -O, but not -Onone.

cc @Erik_Eckstein @Michael_Gottesman

hartbit · 2019-03-31T08:44:43.014Z

I guess opening a ticket on bugs.swift.org

mcousillas6 · 2019-08-16T14:27:32.768Z

Having the same issue here, looks like https://bugs.swift.org/browse/SR-5333?jql=text%20~%20"enum%20associated" it was fixed on swift4 and re-appeared on xcode10.2