8214144: Remove confusing locking_enqueue_completed_buffer Summary: Remove function. Reviewed-by: tschatzl, manc

8214120: [REDO] Fix sun.awt.nativedebug on X11 platforms Reviewed-by: stuefe, ihse

8212982: Rule cases in switch expression accepted even if complete normally Summary: Ensure an error is reported if switch expression does not correctly produce a value. Reviewed-by: mcimadamore

8214025: assert(t->singleton()) failed: must be a constant when ScavengeRootsInCode < 2 Summary: Added missing null checks and checks for pending exception. Reviewed-by: kvn