Sema: Fix MissingCallFailure::diagnoseAsError() crash with special base names

Author: slavapestov

include/swift/AST/DiagnosticsSema.def

@@ -1436,10 +1436,10 @@ ERROR(did_not_call_function_value,none,
       ())
 ERROR(did_not_call_function,none,
       "function %0 was used as a property; add () to call it",
-      (Identifier))
+      (DeclBaseName))
 ERROR(did_not_call_method,none,
       "method %0 was used as a property; add () to call it",
-      (Identifier))
+      (DeclBaseName))
 
 ERROR(init_not_instance_member_use_assignment,none,
       "'init' is a member of the type; use assignment "

lib/Sema/CSDiagnostics.cpp

@@ -3940,22 +3940,22 @@ bool MissingCallFailure::diagnoseAsError() {
 
   if (auto *DRE = getAsExpr<DeclRefExpr>(anchor)) {
     emitDiagnostic(diag::did_not_call_function,
-                   DRE->getDecl()->getBaseIdentifier())
+                   DRE->getDecl()->getBaseName())
         .fixItInsertAfter(insertLoc, "()");
     return true;
   }
 
   if (auto *UDE = getAsExpr<UnresolvedDotExpr>(anchor)) {
     emitDiagnostic(diag::did_not_call_method,
-                   UDE->getName().getBaseIdentifier())
+                   UDE->getName().getBaseName())
         .fixItInsertAfter(insertLoc, "()");
     return true;
   }
 
   if (auto *DSCE = getAsExpr<DotSyntaxCallExpr>(anchor)) {
     if (auto *DRE = dyn_cast<DeclRefExpr>(DSCE->getFn())) {
       emitDiagnostic(diag::did_not_call_method,
-                     DRE->getDecl()->getBaseIdentifier())
+                     DRE->getDecl()->getBaseName())
           .fixItInsertAfter(insertLoc, "()");
       return true;
     }