*** ../bash-5.2-patched/subst.c	2022-10-05 10:22:02.000000000 -0400
--- subst.c	2022-10-06 15:19:08.000000000 -0400
***************
*** 1799,1802 ****
--- 1804,1810 ----
  }
  
+ #define PARAMEXPNEST_MAX	32	// for now
+ static int dbstate[PARAMEXPNEST_MAX];
+ 
  /* Extract a parameter expansion expression within ${ and } from STRING.
     Obey the Posix.2 rules for finding the ending `}': count braces while
***************
*** 1829,1832 ****
--- 1837,1842 ----
      return (extract_heredoc_dolbrace_string (string, sindex, quoted, flags));
  
+   dbstate[0] = dolbrace_state;
+ 
    pass_character = 0;
    nesting_level = 1;
***************
*** 1853,1856 ****
--- 1863,1868 ----
        if (string[i] == '$' && string[i+1] == LBRACE)
  	{
+ 	  if (nesting_level < PARAMEXPNEST_MAX)
+ 	    dbstate[nesting_level] = dolbrace_state;
  	  nesting_level++;
  	  i += 2;
***************
*** 1865,1868 ****
--- 1877,1881 ----
  	  if (nesting_level == 0)
  	    break;
+ 	  dolbrace_state = (nesting_level < PARAMEXPNEST_MAX) ? dbstate[nesting_level] : dbstate[0];	/* Guess using initial state */
  	  i++;
  	  continue;