fix for local variable problem in EXIT trap; add sed-like behavior for null patterns in pattern substitution

eval.c

@@ -1,6 +1,6 @@
 /* eval.c -- reading and evaluating commands. */
 
-/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2022 Free Software Foundation, Inc.
 
    This file is part of GNU Bash, the Bourne Again SHell.
 
@@ -90,13 +90,13 @@ reader_loop ()
 	  switch (code)
 	    {
 	      /* Some kind of throw to top_level has occurred. */
-	    case FORCE_EOF:
 	    case ERREXIT:
+	      if (exit_immediately_on_error)
+		reset_local_contexts ();	/* not in a function */
+	    case FORCE_EOF:
 	    case EXITPROG:
 	    case EXITBLTIN:
 	      current_command = (COMMAND *)NULL;
-	      if (exit_immediately_on_error)
-		variable_context = 0;	/* not in a function */
 	      EOF_Reached = EOF;
 	      goto exec_done;