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Crash: SIGSEGV in RunAffineAnimFromTaskData (fault addr 0x161e558) #16
Description
Filed automatically by emerald's crash reporter.
| commit | unknown |
| platform | darwin/arm64 |
| go | go1.26.1 |
| args | (none) |
| signal | segmentation fault |
What were you doing?
Replace this with what was happening in-game.
Crash log
AI WILD gAIScriptPtr=0x10252047100 logic=0 idx=0 -- recent opcodes:
op=0x5e @ 0x102503940
op=0x00 @ 0x102503949
AI WILD gAIScriptPtr=0x1025204c450 logic=0 idx=1 -- recent opcodes:
op=0x5e @ 0x102503940
op=0x00 @ 0x102503949
op=0x5e @ 0x102503940
op=0x00 @ 0x102503949
op=0x00 @ 0x102503953
op=0x00 @ 0x10250395d
op=0x00 @ 0x102503967
op=0x00 @ 0x102503971
op=0x00 @ 0x10250397b
op=0x00 @ 0x102503985
op=0x00 @ 0x10250398f
op=0x00 @ 0x102503999
op=0x00 @ 0x1025039a3
op=0x00 @ 0x1025039ad
op=0x00 @ 0x1025039b7
op=0x00 @ 0x1025039c1
op=0x00 @ 0x1025039cb
op=0x00 @ 0x1025039d5
op=0x00 @ 0x1025039df
=== EMERALD C CRASH: SIGSEGV at fault addr 0x161e558 ===
0 emerald 0x0000000100c1ebb0 RunAffineAnimFromTaskData + 68
1 emerald 0x0000000100bcee34 pe_install_crash_handler + 424
2 libsystem_platform.dylib 0x000000018e1eb744 _sigtramp + 56
3 emerald 0x0000000100c1eb90 RunAffineAnimFromTaskData + 36
4 emerald 0x0000000100bfda94 AnimTask_DeepInhale + 472
5 emerald 0x0000000100f2adc0 RunTasks + 80
6 emerald 0x0000000100ca8c14 BattleMainCB2 + 28
7 emerald 0x0000000100e1fac0 ClearPokemonCrySongs + 144
8 emerald 0x0000000100e1f8a0 DoSoftReset + 256
9 emerald 0x0000000100e1f3b4 AgbMain + 328
10 emerald 0x0000000100bcd2b8 pe_init + 176
11 libsystem_pthread.dylib 0x000000018e1e1c58 _pthread_start + 136
12 libsystem_pthread.dylib 0x000000018e1dcc1c thread_start + 8
symbolize static frames with:
atos -o /var/folders/hm/g88g9mfs1390g9vccx6r28kc0000gn/T/go-build3370761922/b001/exe/emerald -l 0x1004e4000 0x100c1ebb0 0x100bcee34 0x18e1eb744 0x100c1eb90 0x100bfda94 0x100f2adc0 0x100ca8c14 0x100e1fac0 0x100e1f8a0 0x100e1f3b4 0x100bcd2b8 0x18e1e1c58 0x18e1dcc1c
Full log on the reporter's machine: /var/folders/hm/g88g9mfs1390g9vccx6r28kc0000gn/T/emerald-crash-84543.log
Activity
dylan-botler commentedon Jul 9, 2026
Investigated. Root cause is a 64-bit pointer truncation in the affine battle-anim path:
PrepareAffineAnimInTaskDatapacks theconst union AffineAnimCmd *into twos16task slots (StorePointerInVars), andRunAffineAnimFromTaskDatareloads only 32 bits (LoadPointerFromVars) before dereferencing — the fault addr0x161e558is the surviving low 32 bits of an affine-cmds table that lives above 4 GB on the LP64 host. Fixed by keeping the pointer full-width in a side table keyed by task index (same pattern asStoreSpriteCallbackInData6in this file).PR: #17 (not runtime-verified — the native core doesn't build in CI here).