Open Radar

 
Summary:
I’m writing an initializer for an enum which uses a couple of nonrecursive functions internal to it, and which the compiler apparently does broken codegen for, resulting in a failed compile.

Steps to Reproduce:
1. Check out this branch (also attached):

https://github.com/robrix/Traversal/pull/5

2. Build it.

Expected Results:
I expected it to build, or if my code is broken to tell me that.

Actual Results:
It does not build, apparently due to broken codegen:

Stored value type does not match pointer operand type!
  store %SQ.17* %5, %SQ** %45, align 8, !dbg !422
 %SQ*LLVM ERROR: Broken function found, compilation aborted!

Version:
Xcode 6.1 GM seed 2 on Yosemite 14A379a

Notes:
The error isn’t shown in Xcode at all, even if I copy the entire transcript using the contextual menu item. xcodebuild logged it tho.

Wrapping the reduction in a closure and calling that in the second parameter of the Cons also fails: https://github.com/robrix/Traversal/commit/a7a5539c902a1d01c630799f83fdaa4abe70f1c9

Performing the reduction eagerly and passing that in as the second parameter of the Cons succeeds: https://github.com/robrix/Traversal/commit/51fbec9e4f4a4bfdf8d83dcb19c1f739f8822643 (Note however that this form is incorrect; I’m using Stream because I need evaluation to be lazy.)