Under -q (*hush*), SBCL writes pr to file streams but CLISP and ECL silence it #2

Summary

The same port behaves differently across its Lisp backends: with *hush* set (-q), pr to an explicitly-opened file stream writes on SBCL but is silenced (zero-byte file) on CLISP and ECL. This is an intra-port inconsistency — the most clear-cut variant of the cross-port *hush*/pr divergence.

Repro

# program: (let S (open "out.txt" out) (do (pr "payload" S) (close S)))
LISP_IMPL=sbcl  bin/sbcl/shen  eval -q -l prog.shen   # out.txt = "payload"
LISP_IMPL=clisp bin/clisp/shen eval -q -l prog.shen   # out.txt = 0 bytes
LISP_IMPL=ecl   bin/ecl/shen   eval -q -l prog.shen   # out.txt = 0 bytes

Observed vs expected

• SBCL: writes (native pr override ignores *hush*)
• CLISP, ECL: silenced under *hush* → zero-byte file

Expected: all three backends should behave identically — pr to a non-stdout stream should write regardless of *hush*. SBCL is the correct reference (matches shen-go / ShenScript); CLISP and ECL fall back to the kernel's *hush*-gated path.

Root cause (likely)

shen-cl's native pr override is #+(or ccl sbcl), so CLISP and ECL use the kernel's portable pr, which respects *hush* for all streams. The portable fallback (or these backends' override) should ignore *hush* for non-stdout streams.

How it was found

Caught while building shen-cl's CLI parity tests across LISP_IMPL (sbcl/clisp/ecl) during the 2026-06-13 test build-out, and corroborated by the bifrost harness (hush-file-write case).

Related

Cross-port variant filed at pyrex41/shen-rust#2 and pyrex41/shen-lua#22.