fix 28239-swift-declcontext-lookupqualified.swift, module lookup can be done

without access control now by diagnostics.

Author: lattner

lib/AST/NameLookup.cpp

@@ -1091,9 +1091,6 @@ bool DeclContext::lookupQualified(Type type,
 
   // Look for module references.
   if (auto moduleTy = type->getAs<ModuleType>()) {
-    assert(!(options & NL_IgnoreAccessibility) &&
-           "accessibility always enforced for module-level lookup");
-
     Module *module = moduleTy->getModule();
     auto topLevelScope = getModuleScopeContext();
     if (module == topLevelScope->getParentModule()) {

validation-test/compiler_crashers/28239-swift-declcontext-lookupqualified.swift renamed to validation-test/compiler_crashers_fixed/28239-swift-declcontext-lookupqualified.swift

@@ -1,5 +1,4 @@
-// RUN: not --crash %target-swift-frontend %s -parse
-// REQUIRES: asserts
+// RUN: not %target-swift-frontend %s -parse
 
 // Distributed under the terms of the MIT license
 // Test case submitted to project by https://github.com/practicalswift (practicalswift)