bug in 4.2

[Csaba Toth]

Hi,

If you set PROMPT_DIRTRIM, in some cases strange output displayed in the 
prompt. I found an issue inside the trim_pathname() function, that uses 
memcpy() to copy head and tail together. That should not be used if the 
memory is overlapped and memmove() shall be used instead.

Please find my enclosed patch.

Have a nice day!

Csaba
--- orig/bash-4.2/general.c	2010-12-12 21:06:27.000000000 +0100
+++ modified/bash-4.2/general.c	2014-01-29 12:45:49.762326928 +0100
@@ -766,7 +766,7 @@
   *nbeg++ = '.';
 
   nlen = nend - ntail;
-  memcpy (nbeg, ntail, nlen);
+  memmove(nbeg, ntail, nlen);
   nbeg[nlen] = '\0';
 
   return name;