Add test case for last argp bug.

argp/bug-argp2.c

@@ -0,0 +1,55 @@
+#include <argp.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static struct argp_option argp_options[] = {
+  { "dstaddr", 'd', "ADDR", 0,
+    "set destination (peer) address to ADDR" },
+  { "peer", 'p', "ADDR", OPTION_ALIAS },
+  { NULL }
+};
+
+static error_t parse_opt (int key, char *arg, struct argp_state *state);
+
+static struct argp argp =
+{
+  argp_options, parse_opt
+};
+
+static int cnt;
+
+static int
+do_test (int argc, char *argv[])
+{
+  int remaining;
+  argp_parse (&argp, argc, argv, 0, &remaining, NULL);
+  return cnt != 4;
+}
+
+static error_t
+parse_opt (int key, char *arg, struct argp_state *state)
+{
+  switch (key)
+  {
+  case 'd':
+  case 'p':
+    printf ("got '%c' with argument '%s'\n", key, arg);
+    ++cnt;
+    break;
+  case 0:
+  case ARGP_KEY_END:
+  case ARGP_KEY_NO_ARGS:
+  case ARGP_KEY_INIT:
+  case ARGP_KEY_SUCCESS:
+  case ARGP_KEY_FINI:
+    // Ignore.
+    return ARGP_ERR_UNKNOWN;
+  default:
+    printf ("invalid key '%x'\n", key);
+    exit (1);
+  }
+  return 0;
+}
+
+#define TEST_FUNCTION do_test (argc, argv)
+#include "../test-skeleton.c"