From 9b423a5e8726dd8fbb19bab3042f7a6043a79577 Mon Sep 17 00:00:00 2001
From: zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 29 Mar 2000 19:02:40 +0000
Subject: 	* cppfiles.c (cpp_read_file): Don't pass zero-length string to
 	_cpp_calc_hash.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@32808 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/cppfiles.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'gcc/cppfiles.c')

diff --git a/gcc/cppfiles.c b/gcc/cppfiles.c
index f46052e8b29..a64307ba66b 100644
--- a/gcc/cppfiles.c
+++ b/gcc/cppfiles.c
@@ -623,7 +623,11 @@ cpp_read_file (pfile, fname)
     fname = "";
 
   dummy.nshort = fname;
-  dummy.hash = _cpp_calc_hash (fname, strlen (fname));
+  /* _cpp_calc_hash doesn't like zero-length strings.  */
+  if (*fname == 0)
+    dummy.hash = 0;
+  else
+    dummy.hash = _cpp_calc_hash (fname, strlen (fname));
   slot = (IHASH **) htab_find_slot_with_hash (pfile->all_include_files,
 					      (const void *) &dummy,
 					      dummy.hash, 1);
-- 
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