filevercmp: handle simple~ and numbered.~3~ backup suffixes

[pspp] / lib / regexec.c

diff --git a/lib/regexec.c b/lib/regexec.c
index 2afa5b387976e1caad983c076289a96abfdc2114..21a81669f25ea53ec4752d853b3409bd0ffbe068 100644 (file)
--- a/lib/regexec.c
+++ b/lib/regexec.c
@@ -1,6 +1,6 @@
 /* Extended regular expression matching and search library.
-   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation,
-   Inc.
+   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
 
@@ -1045,6 +1045,11 @@ prune_impossible_nodes (re_match_context_t *mctx)
       re_node_set_free (&sctx.limits);
       if (BE (ret != REG_NOERROR, 0))
        goto free_return;
+      if (sifted_states[0] == NULL)
+       {
+         ret = REG_NOMATCH;
+         goto free_return;
+       }
     }
   re_free (mctx->state_log);
   mctx->state_log = sifted_states;