13:22:14 <dr00tb_> nick /dr00tb
17:36:39 <john_alan_> hi folks - I'm seeing a segmentation fault around 99% complete sync on ARM64 macOS/Darwin
17:37:06 <john_alan_> I've tried on multiple occasions, nothing obvious in logs. On 0.18.2.2
17:37:17 <john_alan_> anything reported/known, before I make a GH issue?
17:38:05 <john_alan_> verbose logging simply shows: ```2023-05-04 09:25:36.240	T Blockchain::have_block_unlocked
17:38:05 <john_alan_> 2023-05-04 09:25:36.240	T BlockchainLMDB::block_exists
17:38:05 <john_alan_> 2023-05-04 09:25:36.240	T BlockchainLMDB::block_rtxn_start
17:38:06 <john_alan_> 2023-05-04 09:25:36.240	T Block with hash c28336da72d1abc42b5c4adb785d8dc0debc779a614a86ef8d43305000b5eea0 not found in db
17:38:06 <john_alan_> 2023-05-04 09:25:36.240	T mdb_txn_safe: destructor
17:38:06 <john_alan_> 2023-05-04 09:25:36.240	T BlockchainLMDB:: get_alt_block
17:38:06 <john_alan_> 2023-05-04 09:25:36.240	T BlockchainLMDB::block_rtxn_start
17:38:07 <john_alan_> 2023-05-04 09:25:36.240	T mdb_txn_safe: destructor```
17:39:58 <john_alan_> when I say I've tried on 'multiple occasions' I mean, I've resyncd 3 times.
17:54:24 <moneromooo> Get a stack trace with gdb.
17:54:46 <moneromooo> ie, gdb /path/to/monerod path/to/core ; bt
17:55:00 <moneromooo> Or coredumpctl debug if you have systemd
17:55:58 <selsta> john_alan_: self compiled?
17:56:06 <selsta> or how did you install it?
17:57:09 <selsta> I assume this issue will be relevant https://github.com/monero-project/monero/issues/8657
17:57:18 <john_alan_> hey both 
17:57:23 <john_alan_> installed via home-brew 
17:57:38 <john_alan_> (on macOS), happy to help debug, checking out 8657 now...
17:57:45 <selsta> you have to use the release binaries from getmonero.org
17:58:16 <selsta> or you have to set `MONERO_RANDOMX_UMASK=8` env var, both work
17:59:04 <john_alan_> ahhhh
17:59:10 <john_alan_> so home-brew default is broken?
17:59:44 <selsta> it's not homebrew's fault and it's unclear if this is a macos bug or not
18:00:18 <john_alan_> this is a bottled version I'm using form homebrew i.e. not compiled locally, we could add a fix to their build script
18:00:28 <selsta> moneromooo: does this look like a serialization issue on 32bit? https://github.com/monero-project/monero/issues/8837#issuecomment-1536588024
18:01:17 <john_alan_> happy to file with homebrew if not already done, either way, thanks both.
18:02:10 <selsta> john_alan_: I'm didn't file any issue yet for it, I feel like they will say we should fix it on our side
18:03:35 <john_alan_> ya I get you, arm64 bin from getmonero is working
18:03:37 <john_alan_> how weird
18:03:42 <john_alan_> I wonder what the root cause is
18:05:11 <john_alan_> I guess some weird JIT security thing
18:05:19 <selsta> RandomX cache invalidation somehow isn't working
18:05:20 <john_alan_> I remember macOS treats JIT differently to BSD
18:05:34 <selsta> but this whole thing only started happening on macOS 13 so we assumed it's a macOS bug
18:05:35 <john_alan_> macOS security issue?
18:06:01 <john_alan_> related to JITc tho right?
18:06:15 <selsta> I don't think it's a security issue, just JIT cache invalidation isn't working causing it to calculate wrong hashes
18:06:27 <selsta> MONERO_RANDOMX_UMASK=8 disables JIT
18:06:44 <john_alan_> thanks selsta, does that impact performance?
18:06:58 <selsta> yes
18:07:12 <john_alan_> when I mean security, I mean macOS is being weird on security causing JIT to behave funny
18:07:17 <john_alan_> they keep messing with JIT rules 
18:08:44 <selsta> there's this document and we do everything that's written there https://developer.apple.com/documentation/apple-silicon/porting-just-in-time-compilers-to-apple-silicon
18:19:32 <john_alan_> Thanks selsta
20:54:02 <moneromooo> selsta: probably
20:54:47 <moneromooo> Something reading unaligned words (I assume their arch doesn't like that, which is usually what bus errors means).
21:15:57 <john_alan_> @selsta: does disable randomX JIT have any other impact outside of performance?