Sema: Fix bug with name lookup from initializers

Author: slavapestov

lib/Sema/TypeCheckNameLookup.cpp

@@ -16,6 +16,7 @@
 //
 //===----------------------------------------------------------------------===//
 #include "TypeChecker.h"
+#include "swift/AST/Initializer.h"
 #include "swift/AST/NameLookup.h"
 #include "swift/AST/ProtocolConformance.h"
 #include "swift/Basic/TopCollection.h"
@@ -192,7 +193,10 @@ LookupResult TypeChecker::lookupUnqualified(DeclContext *dc, DeclName name,
       auto baseDC = baseParam->getDeclContext();
       if (isa<AbstractFunctionDecl>(baseDC))
         baseDC = baseDC->getParent();
+      if (isa<PatternBindingInitializer>(baseDC))
+        baseDC = baseDC->getParent();
       foundInType = baseDC->getDeclaredTypeInContext();
+      assert(foundInType && "bogus base declaration?");
     } else {
       auto baseNominal = cast<NominalTypeDecl>(found.getBaseDecl());
       for (auto currentDC = dc; currentDC; currentDC = currentDC->getParent()) {

test/decl/var/lazy_properties.swift

@@ -159,4 +159,6 @@ class ReferenceSelfInLazyProperty : BaseClass {
 
   var i = 42
   func f() -> Int { return 0 }
+
+  lazy var refBaseClassProp = baseInstanceProp
 }

validation-test/compiler_crashers/28763-swift-typebase-getcanonicaltype.swift renamed to validation-test/compiler_crashers_fixed/28763-swift-typebase-getcanonicaltype.swift

@@ -5,5 +5,5 @@
 // See https://swift.org/LICENSE.txt for license information
 // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
-// RUN: not --crash %target-swift-frontend %s -emit-ir
+// RUN: not %target-swift-frontend %s -emit-ir
 protocol P{func a}extension P{lazy var f=a