+ /* Glibc uses __overflow() for this ... */
+ putc_unlocked('x', stderr);
+ putc_unlocked('\n', stdout);
+
+ /* Test invalid stuff. */
+ close(-42);
+ close(-4711);
+ /* Can't test this, results in a segfault with the "normal" fclose(). */
+ /*fclose(NULL);*/
+ dup(-12);
+ dup2(12, -42);
+