fixed the Q-Reg spec machine used for implementing S^EGq$ (match one of characters in Q-Register)

* It was initialized only once, so it could inherit the wrong local Q-Register table.
  A test case has been added for this particular bug.
* Also, if starting from the profile (batch mode), the state machine could be initialized
  without undo, which then later cause problems on rubout in interactive mode.
  For instance, if S^EG[a] fails and you would repeatedly type `]`, the Q-Reg name could
  grow indefinitely. There were probably other issues as well.
  Even crashes should have been possible, although I couldn't reproduce them.
* Since the state machine is required only for the pattern to regexp translation
  and is performed anew for every character in interactive mode,
  we now create a fresh state machine for every call and don't attempt
  any undo.
  There might be more efficient ways, like reusing the string building's
  Q-Reg parser state machine.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/qreg.h b/src/qreg.h
index 59cf2cc..e9a9b1b 100644
--- a/src/qreg.h
+++ b/src/qreg.h
@@ -241,6 +241,8 @@ gboolean teco_machine_qregspec_auto_complete(teco_machine_qregspec_t *ctx, teco_
 
 void teco_machine_qregspec_free(teco_machine_qregspec_t *ctx);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(teco_machine_qregspec_t, teco_machine_qregspec_free);
+
 /** @memberof teco_machine_qregspec_t */
 void undo__teco_machine_qregspec_free(teco_machine_qregspec_t *);
 TECO_DECLARE_UNDO_OBJECT(qregspec, teco_machine_qregspec_t *);