Merge pull request swiftlang#82295 from hamishknight/wrapping-paper

Author: hamishknight

lib/Sema/CodeSynthesis.cpp

@@ -230,10 +230,12 @@ static ParamDecl *createMemberwiseInitParameter(DeclContext *DC,
     // memberwise initializer will be in terms of the backing storage
     // type.
     if (var->isPropertyMemberwiseInitializedWithWrappedType()) {
-      varInterfaceType = var->getPropertyWrapperInitValueInterfaceType();
+      if (auto initTy = var->getPropertyWrapperInitValueInterfaceType()) {
+        varInterfaceType = initTy;
 
-      auto initInfo = var->getPropertyWrapperInitializerInfo();
-      isAutoClosure = initInfo.getWrappedValuePlaceholder()->isAutoClosure();
+        auto initInfo = var->getPropertyWrapperInitializerInfo();
+        isAutoClosure = initInfo.getWrappedValuePlaceholder()->isAutoClosure();
+      }
     } else {
       varInterfaceType = backingPropertyType;
     }

validation-test/compiler_crashers_2/5716fcca10bf3ff7.swift renamed to validation-test/compiler_crashers_2_fixed/5716fcca10bf3ff7.swift

@@ -1,5 +1,5 @@
 // {"signature":"createImplicitConstructor(swift::NominalTypeDecl*, ImplicitConstructorKind, swift::ASTContext&)"}
-// RUN: not --crash %target-swift-frontend -typecheck %s
+// RUN: not %target-swift-frontend -typecheck -swift-version 5 %s
 struct a @propertyWrapper struct b < c {
   wrappedValue : c
 } @propertyWrapper struct d {