I initially discovered this in 1.9.2 with slime and all that, but I reproduced this on a build of d0a525323b640223bacfb17cde59db995f43cce9 from GitHub with ./abcl --noinit. I don't have a completely minimized case, but it's pretty small.

uname -a: Darwin sew-MBA.local 24.1.0 Darwin Kernel Version 24.1.0: Thu Oct 10 21:05:14 PDT 2024; root:xnu-11215.41.3~2/RELEASE_ARM64_T8103 arm64

Reproduction: Armed Bear Common Lisp 1.9.3-dev Java 23.0.1 Homebrew OpenJDK 64-Bit Server VM Low-level initialization completed in 0.158 seconds. Startup completed in 0.698 seconds. Type ":help" for a list of available commands. CL-USER(1): (setq class (jcall "arrayType" (jstatic "forPrimitiveName" "java.lang.Class" "float"))) #<java.lang.Class class [F {6290834B}> CL-USER(2): (defun represent (class) (cond ((jcall "isPrimitive" class) (intern (string-upcase (jcall "getName" class)) "KEYWORD")) ((jcall "isArray" class) (list :array (represent (jcall "componentType" class)))) (t (jcall "getName" class)))) REPRESENT CL-USER(3): (represent class) (:ARRAY :FLOAT) CL-USER(4): (compile 'represent) REPRESENT NIL NIL CL-USER(5): (represent class) :FLOAT :EXTERNAL CL-USER(6):

I think the interpreted result is correct, but either way it seems like a bug that they're different.

My story gets stranger. I tried to reproduce it with DRIBBLE (for this email) and I couldn't:

COMMON-LISP-USER> (setq class (jcall "arrayType" (jstatic "forPrimitiveName" "java.lang.Class" "float")))

#<java.lang.Class class [F {194B1E17}> COMMON-LISP-USER> (defun represent (class) (cond ((jcall "isPrimitive" class) (intern (string-upcase (jcall "getName" class)) "KEYWORD")) ((jcall "isArray" class) (list :array (represent (jcall "componentType" class)))) (t (jcall "getName" class))))

REPRESENT COMMON-LISP-USER> (represent class)

(:ARRAY :FLOAT) COMMON-LISP-USER> (compile 'represent)

REPRESENT COMMON-LISP-USER> (represent class)

(:ARRAY :FLOAT) COMMON-LISP-USER> (dribble)

If it's any help, I tried re-implementing the function a number of ways, and this was the first one I found that didn't exhibit the problem: (defun represent (class) (if (jcall "isArray" class) (let*((component (jcall "componentType" class)) (mangled (represent component))) (list :array mangled)) (let ((classname (jcall "getName" class))) (if (jcall "isPrimitive" class) (alexandria:make-keyword (string-upcase classname)) (jcall "getName" class)))))

Thanks all!