[Test] Disable test with debug stdlibs.

[nate-chandler]

Now that the SwiftStdlib 5.9 macro has been defined, this test failing with stdlib debug builds is exposed. That is occurring because the back deployment fallback $ss9TaskLocalC13withValueImpl_9operation4file4lineqd__xn_qd__yYaKXESSSutYaKlFTwB is now being called.

In unoptimized stdlib builds, the version of that function that is deserialized into the test case module features an unoptimized copy of the argument %1 into a temporary (%10):

  %10 = alloc_stack $Value                        // users: %14, %13, %11
  copy_addr %1 to [init] %10 : $*Value            // id: %11
  // function_ref swift_task_localValuePush
  %12 = function_ref @swift_task_localValuePush : $@convention(thin) <τ_0_0> (Builtin.RawPointer, @in τ_0_0) -> () // user: %13
  %13 = apply %12<Value>(%9, %10) : $@convention(thin) <τ_0_0> (Builtin.RawPointer, @in τ_0_0) -> ()
  dealloc_stack %10 : $*Value                     // id: %14

This is a problem because swift_task_localValuePush allocates in the async stack (see rdar://107275872) but that fact isn't encoded in SIL (the fix for which is tracked by rdar://108260399), so the alloc_stack/dealloc_stack surrounding that call result in a violation of stack discipline.

push // alloc_stack
push // swift_task_localValuePush
pop // dealloc_stack -- oops

In optimized stdlib builds, the copy has been optimized away by the time the function is deserialized into the test case module:

bb0(%0 : $*R, %1 : $*Value, %2 : @guaranteed $@noescape @async @callee_guaranteed @substituted <τ_0_0> () -> (@out τ_0_0, @error any Error) for <R>, %3 : @guaranteed $String, %4 : $UInt, %5 : @guaranteed $TaskLocal<Value>):
  // function_ref _checkIllegalTaskLocalBindingWithinWithTaskGroup(file:line:)
  %6 = function_ref @$ss039_checkIllegalTaskLocalBindingWithinWithC5Group4file4lineySS_SutF : $@convention(thin) (@guaranteed String, UInt) -> () // user: %7
  %7 = apply %6(%3, %4) : $@convention(thin) (@guaranteed String, UInt) -> ()
  // function_ref TaskLocal.key.getter
  %8 = function_ref @$ss9TaskLocalC3keyBpvg : $@convention(method) <τ_0_0 where τ_0_0 : Sendable> (@guaranteed TaskLocal<τ_0_0>) -> Builtin.RawPointer // user: %9
  %9 = apply %8<Value>(%5) : $@convention(method) <τ_0_0 where τ_0_0 : Sendable> (@guaranteed TaskLocal<τ_0_0>) -> Builtin.RawPointer // user: %11
  // function_ref swift_task_localValuePush
  %10 = function_ref @swift_task_localValuePush : $@convention(thin) <τ_0_0> (Builtin.RawPointer, @in τ_0_0) -> () // user: %11
  %11 = apply %10<Value>(%9, %1) : $@convention(thin) <τ_0_0> (Builtin.RawPointer, @in τ_0_0) -> ()

The argument %1 is forwarded into the apply of swift_task_localValuePush.

rdar://112898559

[nate-chandler]

@swift-ci please test and merge