8226510: No compilation error when switch expression has no result expressions Summary: Ensure a compile-time error is produced when there are no result expressions in an switch expression. Reviewed-by: vromero

8224650: Add tests to support X25519 and X448 in TLS Reviewed-by: xuelei

8226809: Circular reference in printed stack trace is not correctly indented & ambiguous Reviewed-by: bpb

8226706: (se) Reduce the number of outer loop iterations on Windows in java/nio/channels/Selector/RacyDeregister.java Reviewed-by: alanb

8211723: AppCDS: referring to a jar file in any way other than exactly how it was done during dumping doesn't work Summary: Replaced os::file_name_strncmp() with os::same_files(). Reviewed-by: iklam, jiangli

8226878: zero crashes after JDK-8191278 Reviewed-by: shade, jcm

8226514: Replace wildcard address with loopback or local host in tests - part 14 Summary: Improve test stabilty by getting rid of the wildcard address whenever possible. Reviewed-by: chegar, vtewari

8223173: Implement fast class initialization checks on AARCH64 Reviewed-by: aph

8222968: ByteArrayPublisher is not thread-safe resulting in broken re-use of HttpRequests Reviewed-by: chegar, dfuchs

8226879: Memory leak in Type::hashcons Summary: Call delete on xdual type. Reviewed-by: kvn

Merge

8226783: GTK is not being returned as the System L&F on Gnome Reviewed-by: serb, psadhukhan

8226608: Hide the onjcmd option from the help output Reviewed-by: sspitsyn, clanger

Added tag jdk-13+27 for changeset b7f68ddec66f