An inline flet makes the compiler report an error (warning?):

(defun f (x) (flet ((hello (x) (logand x #xffffffff))) (declare (inline hello)) (hello (+ (hello 1) (hello x)))))

CL-USER(6): (compile-file #P"~/abcl-flet-bug.lisp") ; Compiling /home/pjb/abcl-flet-bug.lisp ... ; (DEFUN F ...) ; (DEFUN G ...)

; Compilation unit finished ; The following functions were used but not defined: ; HELLO

; Wrote /home/pjb/abcl-flet-bug.abcl (0.04 seconds) #P"/home/pjb/abcl-flet-bug.abcl" NIL NIL

And the code generated is wrong:

CL-USER(12): (load(compile-file #P"~/abcl-flet-bug.lisp")) ; Compiling /home/pjb/abcl-flet-bug.lisp ... ; (DEFUN F ...)

; Compilation unit finished ; The following functions were used but not defined: ; HELLO

; Wrote /home/pjb/abcl-flet-bug.abcl (0.012 seconds) T CL-USER(13): (f 4) #<THREAD "interpreter" {6A4E43EA}>: Debugger invoked on condition of type UNDEFINED-FUNCTION The function HELLO is undefined. Restarts: 0: CONTINUE Try again. 1: USE-VALUE Specify a function to call instead. 2: RETURN-VALUE Return one or more values from the call to HELLO. 3: TOP-LEVEL Return to top level. [1] CL-USER(14): 3 CL-USER(15):

Without inline, it works well.

CL-USER(15): (load(compile-file #P"~/abcl-flet-bug.lisp")) ; Compiling /home/pjb/abcl-flet-bug.lisp ... ; (DEFUN F ...) ; Wrote /home/pjb/abcl-flet-bug.abcl (0.02 seconds) T CL-USER(16): (f 4) 5 CL-USER(17):

CL-USER(11): (COM.INFORMATIMAGO.TOOLS.MANIFEST:PRINT-BUG-REPORT-INFO)

LISP-IMPLEMENTATION-TYPE "Armed Bear Common Lisp" LISP-IMPLEMENTATION-VERSION "1.3.1" SOFTWARE-TYPE "Linux" SOFTWARE-VERSION "3.2.0-4-amd64" MACHINE-INSTANCE "kuiper" MACHINE-TYPE "X86-64" MACHINE-VERSION "Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz" distribution (:LINUX :DEBIAN "7.8") uname -a NIL *FEATURES* (:COM.INFORMATIMAGO.PJB :SPLIT-SEQUENCE :CLOSER-MOP :COM.INFORMATIMAGO.COMMON-LISP.LISP.CL-STEPPER :NEWLINE-IS-LINEFEED :HAS-ASCII-CODE :HAS-VT :HAS-BELL :HAS-ESCAPE :HAS-LINEFEED :HAS-RETURN :HAS-BACKSPACE :HAS-TAB :HAS-PAGE :HAS-RUBOUT :QUICKLISP :ASDF-PACKAGE-SYSTEM :ASDF3.1 :ASDF3 :ASDF2 :ASDF :OS-UNIX :ASDF-UNICODE :ABCL-BUNDLE-OP-SUPPORTED :X86-64 :JAVA-1.7 :UNIX :LINUX :ARMEDBEAR :ABCL :COMMON-LISP :ANSI-CL :CDR6 :MOP :PACKAGE-LOCAL-NICKNAMES)

/proc/cpuinfo -------------

processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz stepping : 5 microcode : 0x11 cpu MHz : 3073.461 cache size : 8192 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc up arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm dtherm tpr_shadow vnmi flexpriority ept vpid bogomips : 6146.92 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:

CL-USER(12):