Bundled ripgrep aborts with jemalloc 'Unsupported system page size' on 16KB-page ARM64 kernels (Asahi Linux)

[richardpowellus]

Description

The ripgrep binary bundled with the Copilot CLI (<pkg-dir>/ripgrep/bin/linux-arm64/rg) statically links jemalloc built assuming a 4KB page size. On a kernel configured with a 16KB page size — the default on Asahi Linux (Linux-on-Apple-Silicon) — the binary aborts immediately instead of running, which breaks any Copilot CLI feature that shells out to ripgrep for file search.

Environment

• copilot --version: GitHub Copilot CLI 1.0.88
• OS: Ubuntu on Asahi Linux, kernel 7.0.0-1002-asahi-arm (aarch64)
• getconf PAGESIZE: 16384
• Affected path pattern: ~/.cache/copilot/pkg/linux-arm64/<version>/ripgrep/bin/linux-arm64/rg — reproduced on cached versions 1.0.83, 1.0.87, and 1.0.88, so this has been present across multiple releases.

Reproduction

$ getconf PAGESIZE
16384
$ echo hello | ~/.cache/copilot/pkg/linux-arm64/1.0.88/ripgrep/bin/linux-arm64/rg hello
<jemalloc>: Unsupported system page size
<jemalloc>: Unsupported system page size
memory allocation of 160 bytes failed
Aborted (exit code 134)

file on the binary confirms it's statically linked (bundling its own allocator):

.../ripgrep/bin/linux-arm64/rg: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, stripped

For comparison, the distro's own rg (dynamically linked, uses glibc's allocator, no jemalloc) runs fine on the same machine — the crash is specific to this bundle's static jemalloc, not the kernel or the machine generally.

Expected

Any file-search feature that shells out to the bundled ripgrep should work on 16KB-page kernels, since ripgrep itself has no such restriction — this is purely a byproduct of how this specific prebuilt binary was compiled/linked.

Suggested fix

Either build the bundled ripgrep against a page-size-agnostic allocator (e.g. link the system allocator instead of a statically-linked jemalloc build pinned to 4KB pages), or fall back to a PATH-available rg/grep when the bundled binary fails to exec/aborts.

Workaround in use

Replacing the bundled rg at each cached version's ripgrep/bin/linux-arm64/rg with the system's dynamically-linked rg resolves the crash locally, but is undone on every CLI update since it re-fetches the broken bundle.