=== modified file 'plugin-runner.c'
--- plugin-runner.c	2018-08-19 01:03:28 +0000
+++ plugin-runner.c	2019-02-11 05:14:10 +0000
@@ -564,10 +564,12 @@
     case '?':			/* --help */
       state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
       argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
+      __builtin_unreachable();
     case -3:			/* --usage */
       state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
       argp_state_help(state, state->out_stream,
 		      ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
+      __builtin_unreachable();
     case 'V':			/* --version */
       fprintf(state->out_stream, "%s\n", argp_program_version);
       exit(EXIT_SUCCESS);

=== modified file 'plugins.d/askpass-fifo.c'
--- plugins.d/askpass-fifo.c	2018-02-08 10:23:55 +0000
+++ plugins.d/askpass-fifo.c	2019-02-11 05:14:10 +0000
@@ -65,10 +65,16 @@
     fprintf(stderr, ": ");
     fprintf(stderr, "%s\n", strerror(errnum));
     error(status, errno, "vasprintf while printing error");
+    if(status){
+      __builtin_unreachable();
+    }
     return;
   }
   fprintf(stderr, "Mandos plugin ");
   error(status, errnum, "%s", text);
+  if(status){
+    __builtin_unreachable();
+  }
   free(text);
 }
 
@@ -90,14 +96,17 @@
     case ENOTDIR:
     case ELOOP:
       error_plus(EX_OSFILE, errno, "mkfifo");
+      __builtin_unreachable();
     case ENAMETOOLONG:
     case ENOSPC:
     case EROFS:
     default:
       error_plus(EX_OSERR, errno, "mkfifo");
+      __builtin_unreachable();
     case ENOENT:
       /* no "/lib/cryptsetup"? */
       error_plus(EX_UNAVAILABLE, errno, "mkfifo");
+      __builtin_unreachable();
     case EEXIST:
       break;			/* not an error */
     }

=== modified file 'plugins.d/mandos-client.c'
--- plugins.d/mandos-client.c	2019-02-10 04:20:26 +0000
+++ plugins.d/mandos-client.c	2019-02-11 05:14:10 +0000
@@ -2672,9 +2672,11 @@
 	argp_state_help(state, state->out_stream,
 			(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
 			& ~(unsigned int)ARGP_HELP_EXIT_OK);
+	__builtin_unreachable();
       case -3:			/* --usage */
 	argp_state_help(state, state->out_stream,
 			ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
+	__builtin_unreachable();
       case 'V':			/* --version */
 	fprintf_plus(state->out_stream, "%s\n", argp_program_version);
 	exit(argp_err_exit_status);

=== modified file 'plugins.d/password-prompt.c'
--- plugins.d/password-prompt.c	2018-02-08 10:23:55 +0000
+++ plugins.d/password-prompt.c	2019-02-11 05:14:10 +0000
@@ -274,9 +274,11 @@
 	argp_state_help(state, state->out_stream,
 			(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
 			& ~(unsigned int)ARGP_HELP_EXIT_OK);
+	__builtin_unreachable();
       case -3:			/* --usage */
 	argp_state_help(state, state->out_stream,
 			ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
+	__builtin_unreachable();
       case 'V':			/* --version */
 	fprintf(state->out_stream, "%s\n", argp_program_version);
 	exit(argp_err_exit_status);