507c8a1808
#421 committed the compiled tests/test_st_pread (mode 644, non-executable). On a fresh CI checkout make sees it as up-to-date and skips rebuilding, so run_tests.py hits 'Permission denied' exec'ing a non-executable file — the linux/macos 'make check' failure. Remove the binary and gitignore it next to the existing test_st_mirror rule. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>