Update.

* bug-sleep.c: New file.
	* Makefile (tests): Add bug-sleep.

linuxthreads/bug-sleep.c

@@ -0,0 +1,34 @@
+/* PR libc/4005 */
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <time.h>
+
+void *
+run_thread (void *a)
+{
+  while (1)
+    {
+      sleep (10);
+    }
+  return 0;
+}
+
+int
+main (void)
+{
+  pthread_t thr;
+  void *result;
+  alarm (4);
+  printf ("Starting thread.\n");
+  pthread_create (&thr, 0, run_thread, 0);
+  sleep (2);
+  printf ("Canceling thread.\n");
+  pthread_cancel (thr);
+  pthread_join (thr, &result);
+  if (result == PTHREAD_CANCELED)
+    printf ("Thread canceled.\n");
+  else
+    printf ("Thread exited.\n");
+  return 0;
+}