Results for the ANSI tests on abcl-0.22.0, abcl-0.23.0, and the proposed abcl-0.23.1 are attached.

The results

ANSI> (report 'doit '0.22.0 '0.23.1) NIL ANSI> (report 'compileit '0.22.0 '0.23.1) 0.23.1[SATURN] --> 0.22.0[SATURN] additional failures: (FLET.45) NIL

indicate that we still have one regression in the compiled case for flet.45 (this was also present in abcl-0.23.0.

FLET.45 fails in compiling (flet ((nil () 'a)) (nil))

getting lost in PRECOMPILE-FUNCTION-CALL:

[…] 4: (ERROR PROGRAM-ERROR :FORMAT-CONTROL "Wrong number of arguments for ~S." :FORMAT-ARGUMENTS (NIL)) 5: (SYSTEM::ARG-COUNT-ERROR DEFMACRO NIL NIL (SYSTEM::INSTANCE) 1 ...) 6: (#<FUNCTION (LAMBDA (#:G44218)) {5298DB1F}> (NIL)) 7: (SYSTEM::EXPAND-SOURCE-TRANSFORM-1 (NIL)) 8: (SYSTEM:EXPAND-SOURCE-TRANSFORM (NIL)) 9: (PRECOMPILER::PRECOMPILE-FUNCTION-CALL (NIL)) 10: (PRECOMPILER::PRECOMPILE1 (NIL)) 11: (PRECOMPILER::PRECOMPILE-FLET/LABELS (FLET ((NIL NIL 'A)) (NIL))) 12: (PRECOMPILER::PRECOMPILE1 (FLET ((NIL NIL 'A)) (NIL))) 13: (PRECOMPILER::PRECOMPILE-BLOCK (BLOCK FOO (FLET (#) (NIL)))) 14: (PRECOMPILER::PRECOMPILE1 (BLOCK FOO (FLET (#) (NIL)))) 15: (PRECOMPILER::PRECOMPILE-LAMBDA (LAMBDA NIL (BLOCK FOO (FLET # #)))) 16: (PRECOMPILER::PRECOMPILE1 (LAMBDA NIL (BLOCK FOO (FLET # #))))