install_node's post-install probe was
installed_ver=$(node --version 2>/dev/null) under set -e: when the
downloaded Node exists but cannot start (Node 26 linux-x64 builds link
libatomic.so.1, missing on minimal Debian/Ubuntu), the assignment
aborted the whole installer at exit 127 with the loader's explanation
discarded — installs died mid-sentence with no output at all (#87460).
- Probe now captures stderr and degrades with log_error carrying the
loader message plus the libatomic1 hint instead of aborting.
- Debian/Ubuntu installs preinstall libatomic1 (best-effort, mirroring
the existing apt idiom) so the common case just works.
- Termux branch's same-shaped probe gets a || true guard.
Fixes#87460
8f8351aff3