2 files changed, 12 insertions, 2 deletions
diff --git a/clang/lib/Lex/LiteralSupport.cpp b/clang/lib/Lex/LiteralSupport.cpp
index a62508e..5b08d7f 100644
--- a/clang/lib/Lex/LiteralSupport.cpp
+++ b/clang/lib/Lex/LiteralSupport.cpp
@@ -1467,7 +1467,7 @@ void NumericLiteralParser::ParseNumberStartingWithZero(SourceLocation TokLoc) {
   if (s != PossibleNewDigitStart)
     DigitsBegin = PossibleNewDigitStart;
   else
-    IsSingleZero = (s == ThisTokEnd); // Is the only thing we've seen a 0?
+    IsSingleZero = (s == ThisTokBegin + 1);
 
   if (s == ThisTokEnd)
     return; // Done, simple octal number like 01234
diff --git a/clang/lib/Lex/Pragma.cpp b/clang/lib/Lex/Pragma.cpp
index 01c85e6..bba3c89 100644
--- a/clang/lib/Lex/Pragma.cpp
+++ b/clang/lib/Lex/Pragma.cpp
@@ -591,7 +591,8 @@ IdentifierInfo *Preprocessor::ParsePragmaPushOrPopMacro(Token &Tok) {
   }
 
   // Remember the macro string.
-  std::string StrVal = getSpelling(Tok);
+  Token StrTok = Tok;
+  std::string StrVal = getSpelling(StrTok);
 
   // Read the ')'.
   Lex(Tok);
@@ -604,6 +605,15 @@ IdentifierInfo *Preprocessor::ParsePragmaPushOrPopMacro(Token &Tok) {
   assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' &&
          "Invalid string token!");
 
+  if (StrVal.size() <= 2) {
+    Diag(StrTok.getLocation(), diag::warn_pargma_push_pop_macro_empty_string)
+        << SourceRange(
+               StrTok.getLocation(),
+               StrTok.getLocation().getLocWithOffset(StrTok.getLength()))
+        << PragmaTok.getIdentifierInfo()->isStr("pop_macro");
+    return nullptr;
+  }
+
   // Create a Token from the string.
   Token MacroTok;
   MacroTok.startToken();