Issue created by stacks.

This stack WkcAxQ was reported by telemetry:

• compile/bug
• cmd/compile/internal/base.FatalfAt:+3
• cmd/compile/internal/base.Fatalf:=195
• cmd/compile/internal/gc.handlePanic:+7
• runtime.gopanic:+50
• cmd/compile/internal/types2.(*Checker).handleBailout:+7
• runtime.gopanic:+50
• cmd/compile/internal/types2.setDefType:+7
• cmd/compile/internal/types2.(*Checker).typInternal:+31
• cmd/compile/internal/types2.(*Checker).definedType:+1
• cmd/compile/internal/types2.(*Checker).typeDecl:+55
• cmd/compile/internal/types2.(*Checker).objDecl:+141
• cmd/compile/internal/types2.(*Checker).packageObjects:=722
• cmd/compile/internal/types2.(*Checker).checkFiles:+29
• cmd/compile/internal/types2.(*Checker).Files:+13
• cmd/compile/internal/types2.(*Config).Check:+2
• cmd/compile/internal/noder.checkFiles:+69

cmd/compile@go1.23.3 go1.23.3 darwin/arm64  (2)