+2016-02-12 Markus Metzger <markus.t.metzger@intel.com>
+
+ * frame.h (skip_tailcall_frames): Update comment.
+ * frame.c (skip_artificial_frames, skip_tailcall_frames): Return NULL
+ if only artificial frames are found. Update comment.
+ (frame_unwind_caller_id): Handle NULL return.
+ (frame_unwind_caller_pc, frame_unwind_caller_arch): Assert that
+ skip_artificial_frames does not return NULL.
+ (frame_pop): Add an error if only tailcall frames are found.
+ * infcmd.c (finish_command): Move skip_tailcall_frames call into
+ forward-execution case. Add an error if only tailcall frames are
+ found.
+
2016-02-12 Markus Metzger <markus.t.metzger@intel.com>
* stack.c (frame_info): Check frame_unwind_caller_id.