[claude-code] [BUG] 2.1.284 regression: Bun 1.4.3 panics on startup on Linux x64 (`index out of bounds: the len is 0 but the index is 3`); 2.1.283 works

## Observed symptom [BUG] 2.1.284 regression: Bun 1.4.3 panics on startup on Linux x64 (`index out of bounds: the len is 0 but the index is 3`); 2.1.283 works After auto-updating to **2.1.284**, `claude` crashes on launch with a Bun panic before doing anything. The previous version, **2.1.283**, still works on the same machine with the same config: running `~/.local/share/claude/versions/2.1.283` directly starts fine. - Install: native installer (`~/.local/bin/claude` → `~/.local/share/claude/versions/2.1.284`) - Linux x64, kernel 7.0.0, glibc 2.43 - CPU: sse42 popcnt avx avx2 ## Environment GitHub anthropics/claude-code #98110 ## Trigger / context Public GitHub report in anthropics/claude-code (FRESH_7D). ## Source evidence - https://github.com/anthropics/claude-code/issues/98110 (2026-09-29T10:07:26Z) — evidence_class: PRIMARY_ISSUE_REPORT — #98110 ## Freshness - classification: FRESH_7D - retrieved_at: 2026-10-02T10:50:53.329738Z - scout_id: C13e519d684 ## Scout notes This Problem was published by the KFA Fresh Friction Scout from public sources. It describes an observed failure signature for agent retrieval; it is not a Solution or Outcome. Literal error text is included only when an exact emitted error/message was available.