Argument "active" is obscure. It creates a country in STAT_ACTIVE
that doesn't have a capital, and has its origin at the true origin.
If you really want such a country, create it in STAT_NEW normally,
then use edit to go to STAT_ACTIVE.
0 <= fd < FD_SETSIZE must hold, or else undefined behavior in FD_SET()
and buffer overrun in LwpFdwait[fd]. Check of upper bound off by one,
check of lower bound missing.
sell used to search multiple sectors for sellable commodities, keeping
tally in totalcom. It failed with message "No eligible" when none
could be found.
sell's second argument got changed to a single sector in Empire 3. If
the sector can't sell, we return early. Else, totalcom is positive.
Thus, the "No eligible" code is unreachable. Remove it.
POGO can navigate dead ships, and march dead land units. The ghosts
even get sighted and interdicted, and can hit mines (landmines only
until commit fe372539, v4.3.27). Noted for ships in commit 9100af0b.
Has always been broken. Fix by making shp_sel() and lnd_sel()
explicitly reject ghosts.
Same code pattern also exists in pln_sel, but dead plains fail the
efficiency test, so it's harmless there. Apply the same fix anyway.
boar() lets a sector board if it has mobility or usable land units.
Embarked land units are not usable. But it tests only "on ship", not
"on land unit". Broken in 4.0.17.
The transported plane remains on its carrier. When the land unit
moves, the plane is teleported right back to it. Broken since
Chainsaw 3 added land units.
While there, improve the message for planes on ships.
When updating in-place (old==new), we must not write through new
before we're done reading the same memory through old.
Bug: we write the carrier uids too early. Cargo lists aren't updated
when a carrier dies in an in-place update. No such updates are known.
Broken in commit 64a53c90, v4.3.17.
They didn't since commit 93d033cf, v4.3.26. Drawback: micromanagement
incentive to unload them for the update. Similar incentive has always
existed for military on ships.
Since the previous commit, land units loaded on land units get
unloaded when the carrier dies fighting che. Such land units get
stuck in the sector if the take over, and can be boarded. Doesn't
feel right, and increases the micromanagement incentive. Avoid by
letting them fight.
When che destroy a land unit, any embarked units remain stuck on their
now dead carrier. Closely related to and same impact as the bug fixed
in commit 8ccad0d7. Broken since Chainsaw 3 added land units.
The obvious fix would be to match what normally happens when a carrier
gets destroyed: destroy the cargo. Requires recursion. To keep
things as simple as possible, destroy plane cargo, but unload land
unit cargo. That way, the only cargo of cargo to visit are nukes on
planes.
Unloading the land units creates another problem, which will be
addressed in the next commit.
Damage due to lack of maintenance is now limited by the unit's minimum
efficiency.
Before, units could die. Unfortunately, the update left any embarked
units on their dead carrier. Should have seen this when I fixed a
related bug in commit c2c0d1ff, v4.3.22. Broken for ships and land
units when Empire 2 added their maintenance cost, and for planes when
commit 2e40a4bb (v4.3.4) replaced nuclear stockpiles by nuke units.
The common root cause of these bugs is the update bypassing pre-write
functions (bug#1010856).
If another unit with the same number got built, it picked up the stuck
cargo, triggering the oops from commit 6fb5caf6, which see.
In "stuck on dead carrier" state, units pretty much behave as if their
carrier was still alive, with additional protection from the fact that
a dead carrier can't be damaged or boarded.
The server detects this state on startup since commit 7da9aab5, and
refuses to start.
Only a deity can take units off a dead carrier.
When units somehow get stuck on a dead carrier, a new build reusing
the dead carrier's UID picks up its cargo. The cargo gets teleported
to its new carrier when the carrier moves.
Oops when a ship, plane or land unit is created with cargo. To
recover, destroy the cargo.
Commit e3cf1e32 (v4.3.27) created make_stale_if_command_arg() to
permit catching more potential yields on input. Unfortunately, the
implementation of navigate and march sub-commands 'r', 'l' and 's'
breaks it.
do_unit_move() reads units into a unit list at the beginning and at
each stop. It writes them back when they move or sweep. If a unit
changed in the file in between, the changes would get wiped out.
Therefore, do_unit_move() must not yield between stops.
do_unit_move() parses sub-commands into player->argp[], then supplies
defaults for missing arguments, so that code using them (radar(),
do_look(), sona(), mine(), landmine()) won't prompt for missing
arguments. Unclean and brittle. See also commit 28cc236e and commit
45106ab9.
Unfortunately, make_stale_if_command_arg() doesn't recognize the
difference between these defaulted arguments and parsed arguments, so
it makes objects stale, even though the defaulted arguments can't be
missing. If a move or sweep follows, it triggers a false positive
generation oops.
To fix, test "points into argument buffer" (only true for parsed
arguments) instead of "is in player->argp[]". Requires making the
argument buffer accessible: new struct player member argbuf[]. Use it
for parsing commands, in command(), execute(), do_unit_move(). Don't
use it in emp_config(), player_login(), move_ground(), because these
parse something else.
