postgres:17-alpine crashes with SIGSEGV on ARM64 (Apple Silicon) - Alpine 3.23 regression

[yungweng]

Description

postgres:17-alpine (which uses Alpine 3.23) crashes immediately with SIGSEGV (exit code 139) on ARM64 (Apple Silicon Mac). The PostgreSQL binary fails to execute any command, including postgres --version.

Environment

• Host: macOS (Apple Silicon M-series)
• Docker: Docker Desktop 29.1.3
• Architecture: linux/arm64

Reproduction

# This crashes immediately with exit code 139
docker run --rm postgres:17-alpine postgres --version

# This works fine
docker run --rm postgres:17-alpine3.22 postgres --version

Verified Test Matrix

Image Tag	Alpine Version	PostgreSQL	ARM64 Status
postgres:17-alpine3.21	3.21.x	17.7	✅ Works
postgres:17-alpine3.22	3.22.x	17.7	✅ Works
postgres:17-alpine	3.23.2	17.7	❌ Crashes (SIGSEGV)
postgres:17 (Debian)	N/A	17.7	✅ Works

Analysis

The crash was introduced when the 17-alpine tag was updated to use Alpine 3.23 (released December 17, 2025). Both working and broken images use LLVM 19.x, so this is NOT an LLVM issue.

The Alpine container itself runs fine - only the PostgreSQL binary crashes:

# Alpine shell works
docker run --rm postgres:17-alpine cat /etc/alpine-release
# Output: 3.23.2

# PostgreSQL binary crashes
docker run --rm postgres:17-alpine postgres --version
# Exit code: 139 (SIGSEGV)

Suspected Cause

Something changed in Alpine 3.23 that affects PostgreSQL on ARM64. Possible causes:

• musl libc changes
• GCC 14 → 15 compiler changes
• Other toolchain/runtime library changes

Workaround

Use an explicit Alpine 3.22 tag:

# docker-compose.yml
services:
  postgres:
    image: postgres:17-alpine3.22  # Works on ARM64

Or use the Debian-based image:

services:
  postgres:
    image: postgres:17  # Also works

Additional Context

• This affects Apple Silicon Macs (M1/M2/M3/M4)
• The postgres:17-alpine image was last pushed December 18, 2025
• Alpine 3.23 was released December 17, 2025