Two minor fixes for issues discovered by the fuzzer

lib/Sema/CSApply.cpp

@@ -9446,23 +9446,26 @@ applySolutionToInitialization(SyntacticElementTarget target, Expr *initializer,
   // If this property has an opaque result type, set the underlying type
   // substitutions based on the initializer.
   if (auto var = resultTarget.getInitializationPattern()->getSingleVar()) {
-    SubstitutionMap substitutions;
-    if (auto opaque = var->getOpaqueResultTypeDecl()) {
-      resultTarget.getAsExpr()->forEachChildExpr([&](Expr *expr) -> Expr * {
-        if (auto coercionExpr = dyn_cast<UnderlyingToOpaqueExpr>(expr)) {
-          auto newSubstitutions =
-              coercionExpr->substitutions.mapReplacementTypesOutOfContext();
-          if (substitutions.empty()) {
-            substitutions = newSubstitutions;
-          } else {
-            assert(substitutions.getCanonical() ==
-                       newSubstitutions.getCanonical());
+    if (!var->getParsedAccessor(AccessorKind::Get)) {
+      if (auto opaque = var->getOpaqueResultTypeDecl()) {
+        SubstitutionMap substitutions;
+
+        resultTarget.getAsExpr()->forEachChildExpr([&](Expr *expr) -> Expr * {
+          if (auto coercionExpr = dyn_cast<UnderlyingToOpaqueExpr>(expr)) {
+            auto newSubstitutions =
+                coercionExpr->substitutions.mapReplacementTypesOutOfContext();
+            if (substitutions.empty()) {
+              substitutions = newSubstitutions;
+            } else {
+              assert(substitutions.getCanonical() ==
+                         newSubstitutions.getCanonical());
+            }
           }
-        }
-        return expr;
-      });
+          return expr;
+        });
 
-      opaque->setUniqueUnderlyingTypeSubstitutions(substitutions);
+        opaque->setUniqueUnderlyingTypeSubstitutions(substitutions);
+      }
     }
   }
 

lib/Sema/TypeOfReference.cpp

@@ -1758,6 +1758,9 @@ static bool isExistentialMemberAccessWithExplicitBaseExpression(
 Type ConstraintSystem::getMemberReferenceTypeFromOpenedType(
     Type type, Type baseObjTy, ValueDecl *value,
     ConstraintLocator *locator, bool hasAppliedSelf, bool isDynamicLookup) {
+  if (isa<MacroDecl>(value) || type->is<ErrorType>())
+    return ErrorType::get(getASTContext());
+
   auto *outerDC = value->getDeclContext();
 
   // Cope with dynamic 'Self'.

validation-test/IDE/crashers/08fb80df278d76cd.swift → validation-test/IDE/crashers_fixed/08fb80df278d76cd.swift

@@ -1,5 +1,5 @@
 // {"kind":"complete","original":"098f0ede","signature":"swift::constraints::ConstraintSystem::getMemberReferenceTypeFromOpenedType(swift::Type, swift::Type, swift::ValueDecl*, swift::constraints::ConstraintLocator*, bool, bool)","signatureAssert":"Assertion failed: (isa<To>(Val) && \"cast<Ty>() argument of incompatible type!\"), function cast"}
-// RUN: not --crash %target-swift-ide-test -code-completion -batch-code-completion -skip-filecheck -code-completion-diagnostics -source-filename %s
+// RUN: %target-swift-ide-test -code-completion -batch-code-completion -skip-filecheck -code-completion-diagnostics -source-filename %s
 enum a<b> {
   c=d#^^#  macro d()
 }

validation-test/compiler_crashers_2/511f277d722d94a4.swift → validation-test/compiler_crashers_2_fixed/511f277d722d94a4.swift

@@ -1,5 +1,5 @@
 // {"kind":"typecheck","original":"098f0ede","signature":"swift::constraints::ConstraintSystem::getMemberReferenceTypeFromOpenedType(swift::Type, swift::Type, swift::ValueDecl*, swift::constraints::ConstraintLocator*, bool, bool)","signatureAssert":"Assertion failed: (isa<To>(Val) && \"cast<Ty>() argument of incompatible type!\"), function cast"}
-// RUN: not --crash %target-swift-frontend -typecheck %s
+// RUN: not %target-swift-frontend -typecheck %s
 enum a<b> {
   c = d  macro d()
 }

validation-test/compiler_crashers_2/88e136b5aa17e82f.swift → validation-test/compiler_crashers_2_fixed/88e136b5aa17e82f.swift

@@ -1,5 +1,5 @@
 // {"kind":"typecheck","original":"3a2652c9","signature":"(anonymous namespace)::OpaqueUnderlyingTypeChecker::check()","signatureAssert":"Assertion failed: (!UniqueUnderlyingType.has_value() && \"resetting underlying type?!\"), function setUniqueUnderlyingTypeSubstitutions"}
-// RUN: not --crash %target-swift-frontend -typecheck %s
+// RUN: not %target-swift-frontend -typecheck %s
 var a: some Any = 0.0 {
   0
 }