diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index 6495949..5ea27c9 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -176,13 +176,14 @@
 }
 
 bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg) {
-  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID,  &Msg, 1);
+  const std::string *Strs[] = { &Msg };
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, Strs, 1);
   return true;
 }
 
 bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
                 const std::string &Msg2) {
-  std::string MsgArr[] = { Msg1, Msg2 };
+  const std::string *MsgArr[] = { &Msg1, &Msg2 };
   PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID,  MsgArr, 2);
   return true;
 }
@@ -194,21 +195,22 @@
 
 bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
                 const SourceRange& Range) {
-  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, &Msg, 1, &Range,1);
+  const std::string *Strs[] = { &Msg };
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, Strs, 1, &Range,1);
   return true;
 }
 
 bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
                 const std::string &Msg2, const SourceRange& Range) {
-  std::string MsgArr[] = { Msg1, Msg2 };
+  const std::string *MsgArr[] = { &Msg1, &Msg2 };
   PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, MsgArr, 2, &Range, 1);
   return true;
 }
 
 bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1, 
                 const std::string &Msg2, const std::string &Msg3, 
-                const SourceRange& R1) {
-  std::string MsgArr[] = { Msg1, Msg2, Msg3 };
+                const SourceRange &R1) {
+  const std::string *MsgArr[] = { &Msg1, &Msg2, &Msg3 };
   PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, MsgArr, 3, &R1, 1);
   return true;
 }
@@ -223,14 +225,15 @@
 bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
                 const SourceRange& R1, const SourceRange& R2) {
   SourceRange RangeArr[] = { R1, R2 };
-  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID,  &Msg, 1, RangeArr, 2);
+  const std::string *Strs[] = { &Msg };
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, Strs, 1, RangeArr, 2);
   return true;
 }
 
 bool Sema::Diag(SourceLocation Range, unsigned DiagID, const std::string &Msg1,
                 const std::string &Msg2, const SourceRange& R1,
                 const SourceRange& R2) {
-  std::string MsgArr[] = { Msg1, Msg2 };
+  const std::string *MsgArr[] = { &Msg1, &Msg2 };
   SourceRange RangeArr[] = { R1, R2 };
   PP.getDiagnostics().Report(PP.getFullLoc(Range),DiagID, MsgArr,2,RangeArr, 2);
   return true;