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Undo: remember deleted trip in UndoRemoveDivesFromTrip::undo()

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If the last dive of a trip is removed, the trip is deleted.
On redo the dive is added to a non existing trip, leading to a
segfault.

Therefore, keep a copy of the trip to reinstate it on redo.
Note: this cannot work for a sequence of multiple commands.
One would have to rewrite the whole undo-history. Nevertheless,
let's do this as a stop-gap measure.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2018-07-18 19:31:59 +02:00 • committed by Lubomir I. Ivanov
parent b51e616b6a
commit 325b8bba35
4 changed files with 33 additions and 8 deletions
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core/dive.h
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@ -507,6 +507,7 @@ extern void delete_single_dive(int idx);
extern void add_single_dive(int idx, struct dive *dive);
extern void insert_trip(dive_trip_t **trip);
extern struct dive_trip *clone_empty_trip(struct dive_trip *trip);
extern const struct units SI_units, IMPERIAL_units;