Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

array_rank.ll
; RUN: not llvm-as -disable-output <%s 2>&1 | FileCheck %s

!named = !{!0}
!0 = !DICompositeType(tag: DW_TAG_structure_type, name: "A", size: 64, rank: !DIExpression(DW_OP_push_object_address, DW_OP_plus_uconst, 8, DW_OP_deref))

; CHECK:  rank can only appear in array type