# No longer able to type check expressions with Xcode 10.2 (caused by new SIMD API?) **URL:** \ **Category:** Using Swift\ **Tags:** bug, compiler, simd, regression\ **Created:** [April 9, 2019, 4:16pm UTC](https://forums.swift.org/t/no-longer-able-to-type-check-expressions-with-xcode-10-2-caused-by-new-simd-api/22873 "2019-04-09T16:16:29Z")\ **Posts on this page:** 1\ **Showing post:** 8
**Author:** ![Jens](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/jens/32/12903_2.png) [@Jens](https://forums.swift.org/u/Jens)\ **Post date:** [April 27, 2019, 6:52am UTC](https://forums.swift.org/t/no-longer-able-to-type-check-expressions-with-xcode-10-2-caused-by-new-simd-api/22873/8 "2019-04-27T06:52:07Z")
I agree, this and the long standing [auto-balancing brackets bug](https://forums.swift.org/t/auto-balancing-brackets-bug/17136) takes away a lot of the joy from my work days ... It would be great if someone could look into [SR-10461](https://bugs.swift.org/browse/SR-10461), keeping in mind that it's not specific to the new SIMD types, but rather that it has to do with operators and generics. I think this build time regression, which is still in Xcode 10.2.1, needs some attention and priority. cc @tkremenek --- _[View the full topic](https://forums.swift.org/t/no-longer-able-to-type-check-expressions-with-xcode-10-2-caused-by-new-simd-api/22873)._