Roman Rakus <rrakus@redhat.com> writes:
> Repeated in the bash-4.0.38 and bash-4.1.7 by the script;
> #!/bin/bash
> 
> typeset -Ai s
> y='*'
> z='['
> s[$y]=1
> s[$z]=2
> (( s[$z] = s[$z] + ${s[$y]} ))
> (( s[$y] = s[$y] + ${s[$z]} ))
> [[ ${s[$y]} = 4  ]] && echo "ok"

--- variables.c
+++ variables.c	2010-07-29 15:03:48.671425922 +0000
@@ -2398,7 +2398,7 @@ bind_int_variable (lhs, rhs)
 #endif
     v = bind_variable (lhs, rhs, 0);
 
-  if (isint)
+  if (isint && v)
     VSETATTR (v, att_integer);
 
   return (v);