ci: pin newer QEMU binfmt to fix arm64 build segfault#5
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The arm64 cross-build under QEMU emulation on the amd64 runner segfaults
("qemu: uncaught target signal 11 (Segmentation fault)") while dpkg runs
libc-bin's post-install trigger during `apt-get install` (Dockerfile:116),
failing the build with dpkg exit 139.
This is a QEMU user-mode emulation bug, not a Dockerfile/code change: the same
Dockerfile built green on the prior main pushes (2026-05-29/30); only the
GitHub runner's bundled QEMU regressed. Pin a newer QEMU via tonistiigi/binfmt
so setup-qemu-action installs an emulator without the libc-bin segfault.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Problem
The arm64 cross-build under QEMU emulation on the amd64 GitHub runner segfaults during
apt-get install(Dockerfile:116):This is a QEMU user-mode emulation crash while
dpkgrunslibc-bin's post-install trigger — not a Dockerfile or code change. The same Dockerfile built green on the priormainpushes (2026-05-29/30); only the runner's bundled QEMU regressed.Fix
Pin a newer QEMU via
tonistiigi/binfmtin thesetup-qemu-actionstep, which installs an emulator without thelibc-binsegfault.Validation
This PR's own CI build exercises the arm64
apt-getlayer under the new QEMU — a green build here confirms the fix before it reachesmain/:release. (PR builds don't push:release; that happens on merge to main.)Note:
:latestalways resolves to a recent QEMU; pin to a specificqemu-vX.Y.Zif reproducibility is preferred over a moving tag.🤖 Generated with Claude Code