*** ../bash-5.2-patched/expr.c	2022-07-11 10:03:34.000000000 -0400
--- expr.c	2022-10-31 10:51:08.000000000 -0400
***************
*** 1169,1172 ****
--- 1169,1174 ----
  #if defined (ARRAY_VARS)
    aflag = tflag;	/* use a different variable for now */
+   if (shell_compatibility_level > 51)
+     aflag |= AV_ATSTARKEYS;
    v = (e == ']') ? array_variable_part (tok, tflag, (char **)0, (int *)0) : find_variable (tok);
  #else