bug#13845: 24.3.50; gud commands stop responding when using gdb-mi

[Glenn Morris <rgm@gnu.org>]

Thanks. I'm not familiar with gdb, so these are style comments only.

Jean-Philippe Gravel wrote:

> + 	* progmodes/gdb-mi.el (gdb-running, gdb-starting): Removed
> + 	signals for which replies were never received.

Use the present tense for ChangeLog entries.

> + 	(gdb-wait-for-pending): Fix invalid backquote. Use gdb-handler-list.
> + 	instead of gdb-pending-triggers. Update docstring.

Two spaces between sentences.

> ! (defcustom gdb-discard-unordered-replies t
> !   "When non-nil, any out-of-order GDB replies are discarded.

Use the active voice; eg

  Non-nil means discard any out-of-order GDB replies.

> ! This mechanism is provided as a protection against lost GDB replies,
> ! assuming that GDB always replies in the same order Emacs is sending
> ! commands.  When receiving a reply with a given token-number, any
> ! pending messages with a lower token-number are considered out-of-order.

  This protects against lost GDB replies, assuming that GDB always
  replies in the same order as Emacs sends commands.  When receiving a
  reply with a given token-number, assume any pending messages with a
  lower token-number are out-of-order.

> ! (cl-defstruct gdb-handler
> !   "Structure used to keep track of the commands sent to GDB and
> ! handle the replies received."

First line of doc should be a complete sentence.

> ! Handlers are used to keep track the commands sent to GDB and to handle the

Remove "keep", or add "of" (keep track of).

> ! replies received.  TOKEN-NUMBER is the number used as prefix of the GDB/mi
> ! command sent. 

Active voice: Use TOKEN-NUMBER as the prefix...

> ! Upon reception of a reply prefixed with the same TOKEN-NUMBER,
> ! the callback HANDLER-FUNCTION is invoked.

active: invoke the callback...

> ! Additionally, if `gdb-discard-unordered-replies' is non-nil, all handlers
> ! having a token number less than TOKEN-NUMBER are discarded."

active: discard all handlers...

> ! This involves invoking the callback registered with this token number
> ! in `gdb-handler-list' and clearing all pending handlers invalidated
> ! by the reception of this reply."

This invokes the handler ... and clears all pending...