From: Eli Friedman <eli.friedman@gmail.com>
Date: Tue, 2 Sep 2008 05:29:22 +0000 (+0000)
Subject: Fix for PR2750; don't check for an 'e' in the trash after the token.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6f7adbdcd07a6c13cb81bf3048d1e52f149a9377;p=clang

Fix for PR2750; don't check for an 'e' in the trash after the token.

Note that this isn't really a complete fix; I think there are other
potential overrun situations.  I don't really know what the best
systematic fix is, though.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@55622 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Lex/LiteralSupport.cpp b/lib/Lex/LiteralSupport.cpp
index f9fd1aac79..8c2f2aff47 100644
--- a/lib/Lex/LiteralSupport.cpp
+++ b/lib/Lex/LiteralSupport.cpp
@@ -224,7 +224,7 @@ NumericLiteralParser(const char *begin, const char *end,
       saw_period = true;
       s = SkipDigits(s);
     } 
-    if (*s == 'e' || *s == 'E') { // exponent
+    if (s != ThisTokEnd && (*s == 'e' || *s == 'E')) { // exponent
       const char *Exponent = s;
       s++;
       saw_exponent = true;
diff --git a/test/Lexer/numeric-literal-trash.c b/test/Lexer/numeric-literal-trash.c
new file mode 100644
index 0000000000..243825a536
--- /dev/null
+++ b/test/Lexer/numeric-literal-trash.c
@@ -0,0 +1,13 @@
+/* RUN: clang -fsyntax-only -verify %s
+ */
+# define XRECORD(x, c_name) e##c (x, __LINE__)
+
+
+
+
+
+
+ void x() {
+
+XRECORD (XRECORD (1, 1), 1);
+    }