[SyntaxParse] Ignore token in consecutive ID diagnostics

Author: rintaro

lib/Parse/ParseDecl.cpp

@@ -3468,7 +3468,8 @@ void Parser::diagnoseConsecutiveIDs(StringRef First, SourceLoc FirstLoc,
 
   diagnose(Tok, diag::repeated_identifier, DeclKindName);
   auto Second = Tok.getText();
-  auto SecondLoc = consumeToken();
+  auto SecondLoc = Tok.getLoc();
+  ignoreToken();
 
   SourceRange FixRange(FirstLoc, SecondLoc);
   // Provide two fix-its: a direct concatenation of the two identifiers

test/Syntax/round_trip_misc.swift

@@ -28,6 +28,9 @@ do {
 do {
   typealias Alias = A & B & C.D<>
 }
+do {
+  typealias boo bar = Int
+}
 
 // Orphan '}' at top level
 }