ttfx abort() crash with SIGABRT when running screensaver

[laolusrael]

What happened:
ttfx crashed with SIGABRT (abort) while running in screensaver mode.
Two crashes observed on 2026-08-15 (00:22:12 and 23:10:58 WAT), both with
identical command line and backtrace.

Command line:
ttfx -i /home/laolusrael/.config/omarchy/branding/screensaver.txt --frame-rate 120 --canvas-width 0 --canvas-height 0 --reuse-canvas --anchor-canvas c --anchor-text c --random-effect --no-eol --no-restore-cursor

System:

• OS: Arch Linux with Omarchy desktop
• Memory: 62Gi total, 7.6Gi used (no OOM pressure)
• PID: 8882, signal: 6 (ABRT) si_code: SI_TKILL

Backtrace (unresolved, ttfx binary):
#0 0x00007f53fac9a17c in ?? () from /usr/lib/libc.so.6
#1 0x00007f53fac3e5d0 in raise () from /usr/lib/libc.so.6
#2 0x00007f53fac25685 in abort () from /usr/lib/libc.so.6
#3 0x000055cdb0b5130a in ?? () [ttfx + 0xcc30a]
#4 0x000055cdb0b298a9 in ?? () [ttfx + 0xa48a9]
#5 0x000055cdb0b51d09 in ?? () [ttfx + 0xccd09]
#6 0x000055cdb0b23499 in ?? () [ttfx + 0x9e499]
#7 0x000055cdb0b298e9 in ?? () [ttfx + 0xa48e9]
#8 0x000055cdb0b2930a in ?? () [ttfx + 0xa430a]
#9 0x000055cdb0b518a1 in ?? () [ttfx + 0xcc8a1]
#10 0x000055cdb0b51859 in ?? () [ttfx + 0xcc859]
#11 0x000055cdb0b51d2c in ?? () [ttfx + 0xccd2c]
#12 0x000055cdb0b15cdb in ?? () [ttfx + 0x90cdb]
#13 0x000055cdb0b5799c in ?? () [ttfx + 0xd299c]
#14 0x000055cdb0acd704 in ?? () [ttfx + 0x48704]
#15 0x000055cdb0ac87f6 in ?? () [ttfx + 0x437f6]
#16 0x000055cdb0ad052c in ?? () [ttfx + 0x4b52c]
#17 0x00007f53fac27781 in ?? () from /usr/lib/libc.so.6
#18 0x00007f53fac278b9 __libc_start_main () from /usr/lib/libc.so.6
#19 0x000055cdb0ac5b15 in ?? ()

Filed by nemotron-3.5-lightning-free via opencode.

[omarchybot]

Fixed in v0.3.2.

Your backtrace offsets (+0xcc30a, +0xa48a9, +0xccd09) are the panic-abort path, and the panic string recovered from cores with those same offsets is:

thread 'main' panicked at library/std/src/io/stdio.rs:1166:9:
failed printing to stderr: Input/output error (os error 5)

The screensaver's terminal gets killed at lock while a renderer is drawing into it. Its next write fails with EIO, ttfx reported that with eprintln! — to the same dead terminal — and the failed print panicked. Release builds are panic = "abort", so that is your SIGABRT.

ttfx now ends the run quietly when its terminal goes away, and can no longer die reporting anything. Same root cause as #10 and #12, and basecamp/omarchy#6762.