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IRC log for #minetest, 2023-09-22

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All times shown according to UTC.

Time Nick Message
00:03 jonadab Isn't Toki Pona the language that the Book of Woo was written in?
00:16 muurkha there does seem to be a version of it:
00:17 muurkha > soweli meli li nimi e ni: soweli meli li toki poka kon sewi. wan la meli suli la ona li jo e oko pimeja. tenpo nanpa walu sike pini la ona li open lon li kon sewi li kute e kon sewi. kon sewi li toke e ni: o alasa e ma mama sin. ona meli li pana e nimi “mi tawa” tawa jan sama ale sama li tawa tan ma pi suno pi pini ala. tenpo tawa tenpo, tawa ma lete la ona meli li lukin e ken pi moli en pakala.
00:17 muurkha tawa pona en sona pona la sona ona la kon sewi ike li moli ala e ona meli. tenpo suno la ona lape. tenpo pimeja la noka suno li pana e nasin tawa ona lon tan ma pimeja, lon tawa ma suno. pini pi tawa suli la ona li kama tawa ma pini. ma pini li kasi suli lon ma pi kasi suli pi kule laso pi tenpo ale.
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16:41 MinetestBot [git] sfan5 -> minetest/minetest: Improve readability and infos in verbose log (#13828) c311413 https://github.com/minetest/minetest/commit/c3114132d3062954ff6267cb7cfaf029fd37d2ac (2023-09-22T16:41:10Z)
16:41 MinetestBot [git] Panquesito7 -> minetest/minetest: `animaition` -> `animation` (#13827) 9f47e12 https://github.com/minetest/minetest/commit/9f47e123d2b4d4da556984a4166da88743eb821c (2023-09-22T16:41:33Z)
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18:09 erle https://content.minetest.net/packages/cora/ucsigns/ yay :)
18:18 MTDiscord <luatic> erle: i'm currently debugging the segfault my bad apple b3d causes on latest master
18:19 erle luatic start with ubsan
18:19 erle then asan
18:23 MTDiscord <luatic> i've got a backtrace in gdb, it just doesn't make a lot of sense
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18:26 MTDiscord <luatic> although hmm, if the corruption responsible for this happens earlier on and this is just a consequence of it that could be useful
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18:31 erle luatic are you using ubsan
18:32 MTDiscord <luatic> no, not yet
18:32 MTDiscord <luatic> lemme do that
18:38 MTDiscord <luatic> is it possible that ubsan makes the compilation noticeably slower?
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18:47 muurkha erle: what's the great advantage of asan over valgrind?
18:47 MTDiscord <luatic> i just read that it's supposedly much faster
18:47 MTDiscord <luatic> "AddressSanitizer is much faster than tools that do similar analysis such as valgrind. This allows for usage on HPC codes." - from https://www.osc.edu/resources/getting_started/howto/howto_use_address_sanitizer
18:47 muurkha h
18:47 muurkha aha
18:48 MTDiscord <luatic> erle: well, asan ofc catches the segfault and gives a backtrace, but that isn't any more helpful than gdb
18:49 muurkha ubsan might be able to detect problems earlier?
18:50 erle start with ubsan please
18:50 erle no idea if it makes compilation slower
18:50 erle but execution will be, due to the instrumentation
18:51 MTDiscord <luatic> erle: I think I started with ubsan. Let me try again though to be sure.
18:58 MTDiscord <luatic> erle: aaaa now my screen is full of undefined behavior
18:58 MTDiscord <luatic> i didn't even do anything yet
18:58 MTDiscord <luatic> is minetest just like that
18:58 erle luatic you highlight me as if it was my fault lol
18:58 erle tell
18:58 erle yeah it is
18:58 erle post error message to pastebin
18:58 erle i wanna see what horrors you found
18:59 MTDiscord <luatic> i'm getting "runtime error: member call on address 0x558b6ef05220 which does not point to an object of type 'IGUIElement'" when just starting minetest
18:59 erle i used to play minetest compiled with ubsan and what i found is that probably few other people do that
18:59 erle oh oh oh wait
18:59 erle give me a moment
19:00 erle did you use -fno-sanitize=vptr
19:00 MTDiscord <luatic> no
19:00 erle use that
19:00 erle but still pastebin your shit please
19:00 erle i wanna seeeeeeee
19:01 MTDiscord <luatic> so "-fsanitize=undefined -fno-sanitize=vptr" should be fine?
19:04 erle i think so
19:04 erle wait
19:04 erle hmm
19:04 erle one moment
19:04 MTDiscord <luatic> erle: https://pastebin.com/LWqRakZe
19:04 MTDiscord <luatic> there's also an overflow and an invalid value for bool there i think
19:05 erle compile with -g and -fno-omit-frame-pointer or how they are called
19:05 erle for better debugging later
19:05 erle but those 4 options should be enough
19:06 MTDiscord <luatic> aight
19:07 erle src/client/game.cpp:1954:6: runtime error: load of value 27, which is not a valid value for type 'bool'
19:07 erle supertrue
19:07 erle luatic for added fun, run the minetest self tests with the resulting binary
19:08 erle like --run-unittests
19:08 erle maybe you find more fuckery! :D
19:09 MTDiscord <luatic> minetest and fuckery? now way!
19:10 MTDiscord <luatic> i'll switch to my IRC client
19:10 sfan5 asan detects problems earlier than gdb, you should use it if you're looking for a bug
19:10 sfan5 ubsan, meh
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19:26 appguru so i was working on bad apple but it's a b3d recently
19:27 appguru and of course i didn't want all the bad apple frames to clutter my ssd (probably not that bad but still i couldn't really estimate how large the blowup from mp4 -> png frames was going to be)
19:27 MinetestBot [git] savilli -> minetest/minetest: Don't trigger a key event if a key with the same associated char was … d57c936 https://github.com/minetest/minetest/commit/d57c936b080f404df0b544561242b0c45c57f04d (2023-09-22T19:25:13Z)
19:27 MinetestBot [git] rollerozxa -> minetest/minetest: Escape package description in content tab c247761 https://github.com/minetest/minetest/commit/c247761213997e427af4805cfef0c392f98e6aea (2023-09-22T19:25:58Z)
19:27 appguru so i stuffed that on my ssd
19:27 appguru and made a symlink to my mod so that i could conveniently refer to it (and modsec wouldn't complain)
19:27 appguru but today i forgot to mount my external hard drive so the symlink is basically currently broken
19:28 appguru i stuffed that on my hdd, symlink is on the ssd*
19:28 appguru now minetest.get_dir_list doesn't seem to care, so i got an empty frame directory
19:29 appguru since there were no frames, my writer produced a pretty empty b3d (vertices etc. are only lazily added as the first frame is encountered, which is needed because that tells us the resolution)
19:29 appguru now feeding this b3d to minetest killed it
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19:30 erle the obvious lesson here is FULL RECOGNITION BEFORE PROCESSING
19:44 MTDiscord <bla8722> manually fuzzed b3d lol
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22:14 erle MisterE123, I updated this https://github.com/minetest/blog/issues/129
22:14 erle MisterE123, when is next blog post
22:14 erle do i have to make a PR
22:15 erle ???
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