Reported by paxed. A potion of oil, that was already in the midst of exploding,
got picked up through spot_effects(), which led to it merging with
another potion of oil and the freeing of the original obj.
The original obj pointer was still held by breakobj(), and breakobj()
proceeded to delete the obj (again).
Function nesting:
1 spelleffects()
2 -> weffects()
3 -> bhit()
4 -> bhitpile()
5 -> bhito(obj ...)
6 -> hero_breaks(obj ...)
7 -> breakobj(obj ...)
8 -> explode_oil(obj ...)
9 -> splatter_burning_oil()
10 -> explode()
11 -> zap_over_floor()
12 -> melt_ice()
13 -> spot_effects()
14 -> pickup()
15 -> pickup_object(obj ...)
16 -> pick_obj(obj ...)
17 -> addinv(obj ...)
18 -> addinv_core0(obj ...)
19 -> merged(obj ...)
20 -> obfree(obj ...)
21 -> dealloc_obj(obj ...)
8 -> delobj(obj ...)
9 -> delobj_core(obj ...)
10 -> obfree(obj ...)
11 -> dealloc_obj(obj ...)
12 -> impossible("obj already deleted)
This marks the exploding potion with LOST_EXPLODING, so that it won't
get picked up, or merged with another object during the long
sequence of functions, and that should take care of 15-21 above.
Since EDITLEVEL is being incremented for the previous patch anyway,
add the "name_from" bit to the obj struct now, as groundwork for
the code change mentioned in a TODO comment in bones.c:
/* strip user-supplied names */
/* Statue and some corpse names are left intact,
presumably in case they came from score file.
[TODO: this ought to be done differently--names
which came from such a source or came from any
stoned or killed monster should be flagged in
some manner; then we could just check the flag
here and keep "real" names (dead pets, &c) while
discarding player notes attached to statues.] */
if (has_oname(otmp)
&& !(otmp->oartifact || otmp->otyp == STATUE
|| otmp->otyp == SPE_NOVEL
|| (otmp->otyp == CORPSE
&& otmp->corpsenm >= SPECIAL_PM))) {
free_oname(otmp);
}
Also, the bitfield per-byte groupings identified in the struct
weren't accurately reflected, so rearrange the Bitfields,
and correct the per-byte groupings.
This invalidates existing save files and bones.
After finding a trap on a chest or a large box, remember it
as trapped: "You see here a trapped large box."
Randomly generated chests and boxes can be obviously trapped.
Allow defining obviously trapped containers via lua.
Invalidates saves and bones.
Wishing is powerful, so if you cannot safely handle a cockatrice
corpse, then have a wish for one result in the corpse materializing
on the floor rather than in your inventory.
Resolves#1320
Fix misleading indentation that the polyfood() macro inherited from
the misformated polyfodder() macro.
Fix a case where a non-pet monster would avoid eating a cockatrice
corpse but would eat Medusa's corpse.
'Polyfodder' is already a term frequently used by players to describe
items which are useful to hang on to specifically to zap polymorph at
(for example, extra unicorn horns, which can be turned into magic
markers). Using it as the name of a macro which tests whether a food
item will polymorph the creature consuming it is somewhat confusing, and
I think 'polyfood' is a lot clearer.
The g? structs had a mix of variables that were written to
the savefile, and those that were not.
For better clarity and to distinguish those that end up in
the savefile, relocate some g? variables that get written
directly to the savefile into different structs.
This updates EDITLEVEL, although technically it probably
didn't need to, since savefile contents are not changing.
Details:
gb.bases -> svb.bases
gb.bbubbles -> svb.bbubbles
gb.branches -> svb.branches
gc.context -> svc.context
gd.disco -> svd.disco
gd.dndest -> svd.dndest
gd.doors -> svd.doors
gd.doors_alloc -> svd.doors_alloc
gd.dungeon_topology -> svd.dungeon_topology
gd.dungeons -> svd.dungeons
ge.exclusion_zones -> sve.exclusion_zones
gh.hackpid -> svh.hackpid
gi.inv_pos -> svi.inv_pos
gk.killer -> svk.killer
gl.lastseentyp -> svl.lastseentyp
gl.level -> svl.level
gl.level_info -> svl.level_info
gm.mapseenchn -> svm.mapseenchn
gm.moves -> svm.moves
gm.mvitals -> svm.mvitals
gn.n_dgns -> svn.n_dgns
gn.n_regions -> svn.n_regions
gn.nroom -> svn.nroom
go.oracle_cnt -> svo.oracle_cnt
gp.pl_character -> svp.pl_character
gp.pl_fruit -> svp.pl_fruit
gp.plname -> svp.plname
gp.program_state -> svp.program_state
gq.quest_status -> svq.quest_status
gr.rooms -> svr.rooms
gs.sp_levchn -> svs.sp_levchn
gs.spl_book -> svs.spl_book
gt.timer_id -> svt.timer_id
gt.tune -> svt.tune
gu.updest -> svu.updest
gx.xmax -> svx.xmax
gx.xmin -> svx.xmin
gy.ymax -> svy.ymax
gy.ymin -> svy.ymin
Related note:
There are some pointer variables that are heads of chains that were not
moved from 'g?' to 'sv?', because they are not actually written to the
savefile directly, but the objects/monst/trap/lightsource/timer in the
chains they point to are. That can be changed, if desired.
Examples: gi.invent, gm.migrating_objs, gb.billobjs, gm.migrating_mons,
gf.ftrap, gl.light_base, gt.timer_base
The list of possible object locations used when formatting obj->where
wasn't updated when the objs_deleted list was introduced. If object
sanity checking ever tried to report it for something, it would have
been described as "unknown[9]" rather than as the intended "deleted".
Make object deletion work similarly to monster deletion:
it's marked for deletion (by setting the where-field to OBJ_DELETED
and moved to specific deleted-objects chain), but they're actually
freed at the beginning of turn.
This may need some more tweaking, especially in places that iterate
over object chains, but fuzzing did not find any obvious problems.
Fix a case of accessing freed memory: a monster breathed at hero,
destroying some items. The code stored the next item in the chain
(a cloak), but a ring of levitation was destroyed, causing hero to
plop down into lava, destroying the cloak. The item destruction
code then tried to access the destroyed cloak object.
Make the code check the object where-field - which will be different
if the object was marked for deletion. Also removed an extra loop
going through the whole object chain looking for the items to
destroy.
Checking the callers:
toss_up() would have segfaulted prior to use of stone_missile() if obj were NULL.
thitu() now has a guard prior to use of stone_missile()
ohitmon() would have crashed from earlier dereference otmp->dknown if it were NULL,
otmp arg is declared nonnull
thitm() now has a guard prior to use of stone_missile().
hmon_hitmon_do_hit() null obj takes a different code path than the code path
using stone_missile(); comment asserting that added
Define some macros in include/tradstdc.h, for compilers that support
__attribute__((nonnull)), to assist in identifying which parameters
on functions are not supposed to be null pointers.
Next, for the majority of functions declared in include/extern.h, this
adds the appropriate macro that matches the actual use of each function's
parameters. The additions were done after performing some analysis.
These were the rules that were followed when determining which function
parameters should be nonnul, and which are nullable:
1. If the first use of, or reference to, the pointer parameter in the
function is a dereference, then the parameter will be considered
nonnull.
2. If there is code in the function that tests for the pointer parameter
being null, and adjusts the code-path accordingly so that no segfault
will occur, then the parameter will not be considered nonnull (it can
be null).
The use of the nonnull attributes allows the compiler to detect code in
callers of the function where a null parameter could get passed to the function.
If a warning is received the developer will have to do one of the following:
- If the null being passed to the function is now appropriate,
and the function should be able to expect a null parameter, then the
NONNULLxxx macro will have to be removed from the function's prototype.
or
- If the null being passed to the function is not appropriate,
correct the caller so it is not passing null.
or
- If the warning is about comparing to null, it may indicate an
unnecessary null check in the code involved. If it is deemed to be
unnecessary, it can then be removed.
Some static analysis tools apparently can work with the attribute, as well.
Following this, it was discovered that some functions were using one of the
(now) nonnull parameters in the first argument to the 'is_art(obj, ART)'
macro, which is defined like so:
=> #define is_art(o,art) ((o) && (o)->oartifact == (art))
That macro expansion inline resulted in a diagnostic warning because of the
'(o)' portion of the expanded macro, anywhere the macro was used with one of
the nonnull parameters. A test against null for a 'nonnull parameter' causes
a diagnostic warning.
To work around that, I replaced the is_art() macro with a function in
artifact.c, that accomplishes the same thing as the macro.
=> boolean
is_art(struct obj *obj, int art)
{
if (obj && obj->oartifact == art)
return TRUE;
return FALSE;
}
Some documentation...
These are the macros that have been defined for use when specifying the nonnull
parameters in a function prototype:
----------------------------------------------------------------------------
| Macro | Purpose |
+----------------+---------------------------------------------------------+
| NONULL | The function return value is never NULL. |
+----------------+---------------------------------------------------------+
| NONNULLPTRS | Every pointer argument is declared nonnull. |
+----------------+---------------------------------------------------------+
| NONNULLARG1 | The 1st argument is declared nonnull. |
+----------------+---------------------------------------------------------+
| NONNULLARG2 | The 2nd argument is declared nonnull. |
+----------------+---------------------------------------------------------+
| NONNULLARG3 | The 3rd argument is declared nonnull. |
+----------------+---------------------------------------------------------+
| NONNULLARG4 | The 4th argument is declared nonnull (not used). |
+----------------+---------------------------------------------------------+
| NONNULLARG5 | The 5th argument is declared nonnull. |
+----------------+---------------------------------------------------------+
| NONNULLARG7 | The 7th argument is declared nonnull (bhit). |
+----------------+---------------------------------------------------------+
| NONNULLARG12 | The 1st and 2nd arguments are declared nonnull. |
+----------------+---------------------------------------------------------+
| NONNULLARG13 | The 1st and 3rd arguments are declared nonnull. |
+----------------+---------------------------------------------------------+
| NONNULLARG123 | The 1st, 2nd and 3rd arguments are declared nonnull. |
+----------------+---------------------------------------------------------+
| NONNULLARG14 | The 1st and 4th arguments are declared nonnull. |
+----------------+---------------------------------------------------------+
| NONNULLARG134 | The 1st, 3rd and 4th arguments are declared nonnull. |
+----------------+---------------------------------------------------------+
| NONNULLARG17 | The 1st and 7th arguments are declared nonnull (this |
| | was a special-case added for askchain(), where the |
| | arguments are spread out that way. This macro |
| | could be removed if the askchain arguments in the |
| | prototype and callers were changed to make the |
| | nonnull arguments side-by-side). |
+----------------+---------------------------------------------------------+
| NONNULLARG145 | The 1st, 4th and 5th arguments are declared nonnull |
| | (this was a special-case added for find_roll_to_hit(), |
| | in uhitm.c, where the arguments are spread out that way.|
| | We can't just use NONNULLPTRS there because the 3rd |
| | argument 'weapon' can be NULL). |
+----------------+---------------------------------------------------------+
| NONNULLARG24 | The 2nd and 4th arguments are declared nonnull (this |
| | was a special-case added for query_objlist() |
| | in invent.c). |
+----------------+---------------------------------------------------------+
| NONNULLARG45 | The 4th and 5th arguments are declared nonnull (this |
| | was a special-case added for do_screen_description(), |
| | in pager.c, where the arguments are spread out that |
| | way. We can't just use NONNULLPTRS there because the |
| | 6th argument can be NULL). |
+----------------+---------------------------------------------------------+
| NO_NONNULLS | This macro expands to nothing. It is just used to |
| | mark that analysis has been done on the function, |
| | and concluded that none of the arguments could be |
| | marked nonnull.That distinguishes a function that has |
| | not been analyzed (yet), from one that has. |
+----------------+---------------------------------------------------------+
The NO_NONNULLS macro is meant to place a flag on the prototype to
make people aware that an assessed function was determined to not
be eligible for nonnull parameters. It expands to nothing.
Unfortunately, that macro was added partway through this exercise, so there
aren't many instances of it in the upper parts of include/extern.h, even though
the functions there were likely assessed and categorized as not having any
eligible nonnull parameters. It just never got any macro at all, in that case.
Following the parameter usage analysis that was done, the following was
noted:
Some NetHack functions have added a test to catch a passed null
parameter, and exit the function early as a result, or call
impossible(), and then exit. While that approach prevents segfaults
from dereferencing a null parameter, the early return is silent
(when impossible is not called anyway), and the function's true
purpose is not fulfilled. Also, the calling function may have no
awareness that the function did not complete its intended purpose,
in many instances.
Functions with such a test and early return, cannot have the parameter
declared 'nonnull', because the code to test for 'null' will cause a
diagnostic to be issued if the parameter is nonnull.
It might be good to revisit some of those functions and consider,
on a case by case basis, declaring the parameter nonnull in the
prototype, and the test/code-path commented out.
Add pickup_stolen option to autopick items stolen from you by a nymph or
monkey, even if they don't match your normal autopickup settings.
Replace was_dropped, was_thrown with a 2-bit bitfield that can contain
values LOST_DROPPED, LOST_THROWN, and LOST_STOLEN (or 0), since they
should all be mutually exclusive anyway as they track the most recent
way the item left the hero's inventory.
[Rebase/merge conflict fixed up. PR]
This is based on a feature in UnNetHack (and I think some other variants
as well). If the hero intentionally drops an item with 'pickup_dropped'
disabled, don't autopick it back up when walking over that square again.
Typically when the player drops an item, it's because she doesn't want
it in her inventory any more, and this option stops autopickup from
defeating that goal (especially useful for tasks like stash management
without a container). Players have come up with workarounds to this
problem like toggling autopickup when approaching their stash pile or
adding name-based autopickup exceptions to allow them to exclude
individual items from autopickup, but this behavior should reduce the
need for those things.
I think 'pickup_dropped' is a little unfortunate because it suggests
equivalence to 'pickup_thrown' (i.e. any dropped items will be
automatically picked up regardless of autopickup exceptions). Calling
it something like 'nopick_dropped' might be better, but as far as I can
tell options cannot start with the word 'no' because it's interpreted as
a negation of the rest of the option name.
Instead of a 5% chance for crystal plate mail or crystal helmet to
break each time it's subjected to breakage, switch to a 10% chance
but the damage is treated as erosion rather than break/don't-break.
'crystal foo' will need to go through four stages of damage before
breaking: cracked crystal foo, very cracked crystal foo, thoroughly
cracked crystal foo, then gone. Crackproof handling is included,
described as tempered crystal foo.
It mostly still applies to throwing and kicking the item. Having
some hits trigger damage might be worthwhile but isn't implemented.
Object creation within lua code probably needs to be updated, and
when the Mitre of Holiness is created in the priest/priestess quest
it should start out as tempered (erodeproof). Perhaps it ought to
be erodeproof regardless of where/how it's created.
The consolidation of global variables from scattered source
files into decl.c and declared in decl.h was begun in 3.7.0.
Their placement in common files was done for centralized
initialization and potential re-initialization during a
"play again" scenario.
It wasn't really necessary for all of them to be housed in a
single huge structure to meet the "play again" requirement,
and the single huge structure has been a little unwieldy when
it comes to maintenance.
Following this commit, instead of one single extremely large structure
named 'g' to house all of the relocated global variables, they
are distributed into several ga through gz.
To make things easy for the developer, each variable is placed
into the struct corresponding to the starting letter of the variable.
That way, no lookup is required in order to know which struct houses
a particular variable, it is a simple match to the starting letter
for all the centralized global variables.
A global variable named 'amulets', would be found in ga.
ga.amulets
^ ^
A global varable named 'move', would be found in gm.
gm.moves
^ ^
A global variable named 'val_for_n_or_more' would be found in gv.
gv.val_for_n_or_more
^ ^
A global variable named 'youmonst' would be found in gy.
gy.youmonst
^ ^
It turns out that there are some objects marked unpaid that aren't
carried by the hero, so the recent sanity check for unpaid/no_charge
could complain. Unpaid items dropped on the shop boundary (gap in
shop wall, doorway, shk's free spot) stayed unpaid when dropped onto
the floor, similar to recent change for pushed shop-owned boulders.
Don't give sanity complaints for those. They could be all the way
inside a shop too, where unpaid items in a gap in the shop wall got
pushed into the shop when the wall was repaired. (Possibly those
should come off the bill instead of remaining unpaid.)
Teleporting items out of a shop was marking them unpaid instead of
treating that as robbery. That's a bug caught by the sanity check.
rloco() was also marking shop items which got teleported from one
spot inside the shop to another spot inside the same shop as unpaid.
Fix both of those things. Also, if an unpaid item on the boundary
gets teleported all the way inside, take it off the bill.
Change 'I u' to mention whether there are additional unpaid items on
the floor somewhere since they won't be part of unpaid inventory and
they're not on the used-up bill either. It might occasionally help
the player figure out why the shopkeeper won't let the hero out of
the shop.
A giant mummy starts out with a mummy wrapping but couldn't wear it.
Allow humanoids who are bigger than human size (including poly'd hero
when applicable) to wear such cloaks. They won't do so if they are
invisible and the cloak would let hero start seeing them.
Format a horn of plenty whose charge count is unknown but is known to
be empty as "empty horn of plenty" like is done for real containers.
This was too easy; I must have missed something....
One of the drivers of this change was that screen coordinates require a
type that can hold values greater than 127. Parameters to the window
port routines require a large type in order to be able to have values
a fair bit larger than COLNO and ROWNO passed to them, particularly for
their use to the right of the map window.
This splits the uses of xchar into 3 different situations, and adjusts
their type and size:
xchar
|
-----------------------
| | |
coordxy xint16 xint8
coordxy: Actual x or y coordinates for various things (moved to 16-bits).
xint16: Same data size as coordxy, but for non-coordinate use (16-bits).
xint8: There are only a few use cases initially, where it was very
plain to see that the variable could remain as 8-bits, rather
than be bumped to 16-bits. There are probably more such cases
that could be changed after additional review.
Note: This first changed all xchar variables to coordxy. Some were
reviewed and got changed to xint16 or xint8 when it became apparent that
their usage was not for coordinates.
This increments EDITLEVEL in patchlevel.h
Implement the suggestion that falling rock traps and rolling boulder
traps be harmless to xorns. I've extended that to all missiles made
of stone (rocks, gems, boulders, a handful of other things that will
only matter if poly'd hero throws in '<' direction or is hit by stuff
scattered by an explosion).
I excluded ghosts because they would become even harder to kill and
the missile handling would need extra checks to test for blessed objs.
A shop-owned glob picked up by the hero was added to shop's bill
and if that shrank to nothing it moved from the unpaid portion to
used-up portion as intended. But once there it retained obj->owt
of 0 and if 'sanity_check' was enabled, that triggered a warning
every move until finally paid for. Both the 'Ix' list of used-up
items and itemized shop billing revealed a weight of 0 aum if
'wizweight' was enabled.
Keep track of the weight a glob had when it becomes unpaid, then
reset from 0 to that amount if it becomes used-up. This overloads
the obj->oextra->omid field which is an unsigned int previously
only used for corpses. Now for globs it is pre-bill obj->owt which
is also unsigned int. I didn't add new oextra access functions for
it; it is only used in two places and existing omid ones suffice.
When you push a pile of boulders, describe the second and remainder
as "the next boulder" rather than just "the boulder". Matters most
when pushing into water or lava and you keep on pushing when the
first one or more sink into the pool or plug it, but also matters
for an ordinary push where the top-most one moves successfully and
then blocks the continuation attempt to push the second one. It was
somewhat confusing when all the messages said "the boulder" whether
they were referring to the same boulder or different ones.
Multiple pushes on the same move has always been a bit odd, but this
doesn't change that, just the feedback it generates.
When using a menu to drop or put in items into a container,
allow putting in the item (or items) you picked up previously,
by selecting the 'P' entry from the item class menu
Inspired by the itemcat patch by Stanislav Traykov.
Invalidates saves and bones.
It's redundant with g.moves, so there is no more need for it.
Way, way back, it looks like g.moves and g.monstermoves can and did
desync, where g.moves would track the amount of moves the player had
gotten (and would therefore increase faster if the player were hasted)
and g.monstermoves would track the amount of monster move cycles, aka
turns. But this has not been the case for a long time, and they both
increment together in the same location in allmain.c. There are no
longer any cases where they will not be the same value.
This is a save-breaking change because it changes struct
instance_globals, but I have not updated the editlevel in this commit.
Functionally similar to reading a T-shirt or apron, but rather than
actual text printed on the shirt being displayed, the design of the
Hawaiian shirt is described: for example, "hula dancers on an orange
background" or "tropical fish on an abstract background". Much like
T-shirts have their text included in the game-end inventory list ('a
blessed +2 T-shirt with text "foo"'), Hawaiian shirts now have a brief
description of their design appended to their item name under the same
circumstances.
Because 'reading' a Hawaiian shirt doesn't actually involve reading
text, using the 'r' command in this way doesn't break illiterate
conduct.
Use (obj->spe & CORPSTAT_GENDER) for figurines as well as for
statues and corpses.
Support wishing for
"{female,male,neuter} {corpse,statue,figurine} [of <monster>]".
and
"{female,male,neuter} <monster> {corpse,statue,figurine}".
Also
"{corpse,statue,figurine} of {female,male,neuter} <monster>"
where the qualifier might be in the middle instead of a prefix.
Dead monsters that had traits saved with the corpse would revive as
the same gender, but ordinary corpses revived with random gender so
could be different from before they got killed.
Since corpses of monsters lacked gender, those for monsters with
gender-specific names were described by the neuter name.
This is a fairly big change for a fairly minor problem and needs a
lot more testing.
Fixes#531
We used to have the contents of chests and large boxes be immune to
water damage, oilskin sacks immune unless the sack was cursed, other
containers be vulnerable. Some reddit discussion about ice boxes in
unnethack indicates that they are treated like oilskin sacks, which
makes sense. This adds that to nethack and also makes chests and
large boxes behave similarly. So it's now: nothing is immune even
when cursed (except statues); oilskin sacks, ice boxes, and other
boxes are immune to water damage unless cursed; all other containers
vulnerable even when not cursed.
|
| Old New
|immune all statues, statues
| the time chests, large boxes
|
|immune when BU, oilskin sacks oilskin sacks,
| vulnerable if C ice boxes,
| chests, large boxes
|
|vulnerable ordinary sacks, ordinary sacks,
| all the time bags of holding, bags of holding
| ice boxes
|
I suspect that the old ice box classification might have been an
accident caused by the Is_box() predicate yielding False for it.
The changes won't make much difference to actual play. Chests and
large boxes are rarely carried and never start out cursed, ice boxes
even more so, and sacks/bags haven't been changed. However, players
might intentionally curse a container to keep strong pets from
picking it up, or be carrying a box because they haven't found a bag
yet and then muck about with fountains or thrones and get it cursed.
Another mystery. Candles and oil lamps have obj->spe set to 1
but that isn't used by begin_burn() and such so I don't know why.
Magic lamp has spe set to 1 to indicate that there is a djinni
inside, but letting the djinni out converts it into an oil lamp.
I don't know if there is any case where it might actually be 0.
(Wishing yields an oil lamp rather than an empty magic lamp so
that isn't it. Cancellation magic doesn't affect it either.)
uball->spe used to be used during restore way back in 2.3e.
There hasn't been any any point in setting it when starting
punishment and clearing it when ending punishment for decades
so get rid of that.
Nearly as ancient--but not quite--back in 3.10 patchlevel N,
obj->spe was set to -1 when the Amulet of Yendor was saved in
a bones file. That was to flag it as fake, before the cheap
plastic imitation got added as a separate object.
So obj->spe isn't "special for uball and amulet" any more.
Started out adding spe==2 for eggs but ended up changing other
things too.
FIXME? The line "special for uball and amulet" baffles me:
uball->spe is set to 1 during punishment (with an ambiguous
comment "special ball (see save)"), and back to 0 afterwards, but
otherwise seems to be unused.
"and amulet" is ambiguous; it should either be "and the Amulet"
or "and amulets". I assume it probably referred to the former but
it doesn't seem to be used for either kind as far as I can tell.
Cap overall AC at -99 instead of -128. Put the same limit of 99
on enchantment and charge count of individual objects.
^X now reports if/when AC has reached its limit since players
could see that reaching that limit and then enchanting worn items
will change the worn items but not the total. (Same thing would
have happened with -128, just without any explanation and less
likely to accomplish.)
Won't affect normal play for any reasonable definition of normal.
Use a linked list to store stair and ladder information, instead
of having fixed up/down stairs/ladders and a single "special" (branch)
stair.
Breaks saves and bones.
Adds information to migrating objects and monsters for the dungeon
and level where they are migrating from.
Some eggs and tins could cause an out of bounds index into the
mons[] array. Post-3.6 bug: the faulty part of the test is only
relevant for 3.7 genetic engineer monster. Earlier versions just
called pm_to_cham() which does it's own index validation.
Fixes#406
ignitable() was excluding magic lamp and then every place that
used it did so as 'ignitable(obj) || obj->otyp == MAGIC_LAMP'
so just include magic lamp.
I noticed that while hunting for an explanation for report #K2734
where returning to a previously visited level triggered the
warning "begin_burn: unexpected eggs". I've decided that the
zombie apocalypse is probably the cause. It inserted a new type
of timer in the list of such but it didn't bump EDITLEVEL to
invalidate save and bones files which relied on indices into the
old list. I'm not sure whether we should bump that now.
Tin handling code used tin->cknown to indicate that the variety
(soup, deep fried, pureed, &c) was known, but neither object
identification nor end of game disclosure was setting cknown for
that type of object.
^I behaves as if cknown is set, so the problem was hidden during
times when anyone was likely to be paying attention.
