diff -ru orig/bash-master/builtins/set.def new/bash-master/builtins/set.def
--- orig/bash-master/builtins/set.def	2022-01-05 00:03:45.000000000 +0200
+++ new/bash-master/builtins/set.def	2022-07-05 11:54:31.545828400 +0300
@@ -76,6 +76,8 @@
           emacs        use an emacs-style line editing interface
 #endif /* READLINE */
           errexit      same as -e
+          errfail      execution of command lists will stop whenever
+                       a single command return non-zero status
           errtrace     same as -E
           functrace    same as -T
           hashall      same as -h
@@ -196,6 +198,7 @@
   { "emacs",     '\0', (int *)NULL, set_edit_mode, get_edit_mode },
 #endif
   { "errexit",	  'e', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+  { "errfail",	  '\0', &errfail_opt, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
   { "errtrace",	  'E', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
   { "functrace",  'T', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
   { "hashall",    'h', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
@@ -655,6 +658,7 @@
 {
   pipefail_opt = 0;
   ignoreeof = 0;
+/*  errfail_opt = 0 ;       errfail IS inherit by sub-shells */
 
 #if defined (STRICT_POSIX)
   posixly_correct = 1;
diff -ru orig/bash-master/execute_cmd.c new/bash-master/execute_cmd.c
--- orig/bash-master/execute_cmd.c	2022-01-05 00:03:45.000000000 +0200
+++ new/bash-master/execute_cmd.c	2022-07-05 13:03:18.379533800 +0300
@@ -2706,7 +2706,7 @@
       QUIT;
 
 #if 1
-      execute_command (command->value.Connection->first);
+      exec_result = execute_command (command->value.Connection->first);
 #else
       execute_command_internal (command->value.Connection->first,
 				  asynchronous, pipe_in, pipe_out,
@@ -2714,10 +2714,15 @@
 #endif
 
       QUIT;
-      optimize_fork (command);			/* XXX */
-      exec_result = execute_command_internal (command->value.Connection->second,
+
+      /* With errfail, the ';' is similar to '&&' */
+      /* Execute the second part, only if first part was OK */
+      if ( !errfail_opt || exec_result == EXECUTION_SUCCESS ) {
+          optimize_fork (command);			/* XXX */
+          exec_result = execute_command_internal (command->value.Connection->second,
 				      asynchronous, pipe_in, pipe_out,
 				      fds_to_close);
+      } ;
       executing_list--;
       break;
 
diff -ru orig/bash-master/flags.c new/bash-master/flags.c
--- orig/bash-master/flags.c	2022-01-05 00:03:45.000000000 +0200
+++ new/bash-master/flags.c	2022-07-05 13:42:12.287799400 +0300
@@ -156,6 +156,12 @@
    with a 0 status, the status of the pipeline is 0. */
 int pipefail_opt = 0;
 
+/* Non-zero means that when executing connected commands (';' or new lines)
+   the sequence will be stopped when  any individual commands return a non-zero
+   status. Similar to '&&'. Used for improved error handling */
+
+int errfail_opt = 0;
+
 /* **************************************************************** */
 /*								    */
 /*			The Flags ALIST.			    */
diff -ru orig/bash-master/flags.h new/bash-master/flags.h
--- orig/bash-master/flags.h	2022-01-05 00:03:45.000000000 +0200
+++ new/bash-master/flags.h	2022-07-05 11:25:14.515741700 +0300
@@ -48,7 +48,7 @@
   echo_command_at_execute, noclobber,
   hashing_enabled, forced_interactive, privileged_mode, jobs_m_flag,
   asynchronous_notification, interactive_comments, no_symbolic_links,
-  function_trace_mode, error_trace_mode, pipefail_opt;
+  function_trace_mode, error_trace_mode, pipefail_opt, errfail_opt;
 
 /* -c, -s invocation options -- not really flags, but they show up in $- */
 extern int want_pending_command, read_from_stdin;