[NFC] [ModuleTrace] Add negative test case for cycles in trace emission (ep2).

Context: rdar://67704000.

Author: varungandhi-apple

…_modules/ComplexModuleGraph2/DaemonKit.h …omplexModuleGraph2/DaemonKit/DaemonKit.htest/Driver/Inputs/imported_modules/ComplexModuleGraph2/DaemonKit.h renamed to test/Driver/Inputs/imported_modules/ComplexModuleGraph2/DaemonKit/DaemonKit.h test/Driver/Inputs/imported_modules/ComplexModuleGraph2/DaemonKit.h renamed to test/Driver/Inputs/imported_modules/ComplexModuleGraph2/DaemonKit/DaemonKit.h

@@ -1,3 +1,5 @@
+#import <DaemonKit/ViolateSecondLawOfThermodynamics.h>
+
 #import <CoreDaemon.h>
 
 struct DaemonPair {

test/Driver/Inputs/imported_modules/ComplexModuleGraph2/DaemonKit/ViolateSecondLawOfThermodynamics.h

@@ -0,0 +1,5 @@
+#import <CoreDaemon.h>
+
+struct MaxwellsDaemon {
+  Runner *doorOperation;
+};

test/Driver/Inputs/imported_modules/ComplexModuleGraph2/module.modulemap

@@ -14,7 +14,11 @@ module CoreDaemon {
 }
 
 module DaemonKit {
-  header "DaemonKit.h"
+  umbrella header "DaemonKit/DaemonKit.h"
+  explicit module ViolateSecondLawOfThermodynamics {
+    header "DaemonKit/ViolateSecondLawOfThermodynamics.h"
+    export *
+  }
   export *
 }
 

test/Driver/loaded_module_trace_directness_2.swift

@@ -99,22 +99,24 @@ public func runBoth(_ pair: DaemonKit.DaemonPair) {
 // RUN: %target-swift-frontend %s -typecheck -DTestDaemon -DV1 -module-name TestDaemonV1 -emit-loaded-module-trace-path %t/TestDaemonV1.trace.json -I %t/include
 // RUN: %FileCheck %s --check-prefix=TESTDAEMON < %t/TestDaemonV1.trace.json
 
-// RUN: %target-swift-frontend %s -typecheck -DTestDaemon -DV2 -module-name TestDaemonV2 -emit-loaded-module-trace-path %t/TestDaemonV2.trace.json -I %t/include
-// RUN: %FileCheck %s --check-prefix=TESTDAEMON < %t/TestDaemonV2.trace.json
+// FIXME: rdar://67704000
+// RUN: not --crash %target-swift-frontend %s -typecheck -DTestDaemon -DV2 -module-name TestDaemonV2 -emit-loaded-module-trace-path %t/TestDaemonV2.trace.json -I %t/include
+// SKIP: %FileCheck %s --check-prefix=TESTDAEMON < %t/TestDaemonV2.trace.json
 
 // RUN: %target-swift-frontend %s -typecheck -DTestDaemon -DV3 -module-name TestDaemonV3 -emit-loaded-module-trace-path %t/TestDaemonV3.trace.json -I %t/include
 // RUN: %FileCheck %s --check-prefix=TESTDAEMON < %t/TestDaemonV3.trace.json
 
-// RUN: %target-swift-frontend %s -typecheck -DTestDaemon -DV4 -module-name TestDaemonV4 -emit-loaded-module-trace-path %t/TestDaemonV4.trace.json -I %t/include
-// RUN: %FileCheck %s --check-prefix=TESTDAEMON < %t/TestDaemonV4.trace.json
+// FIXME: rdar://67704000
+// RUN: not --crash %target-swift-frontend %s -typecheck -DTestDaemon -DV4 -module-name TestDaemonV4 -emit-loaded-module-trace-path %t/TestDaemonV4.trace.json -I %t/include
+// SKIP: %FileCheck %s --check-prefix=TESTDAEMON < %t/TestDaemonV4.trace.json
 
 #if TestDaemon
   #if V1
     import CoreDaemon
   #endif
   #if V2
     import DaemonKit
-    public func noop(_: CoreDaemon.Daemon) {}
+    public func noop(_: CoreDaemon.Daemon, _: MaxwellsDaemon) {}
   #endif
   #if V3
     import CoreDaemon