Hi,
I stumbled upon this bug of the baseline compiler:
--8<---------------cut here---------------start------------->8---
scheme@(guile-user)> (compile '(not (list 1 2)) #:optimization-level 2)
$3 = #f
scheme@(guile-user)> (compile '(not (list 1 2)) #:optimization-level 1)
ice-9/boot-9.scm:1685:16: In procedure raise-exception:
In procedure struct-vtable: Wrong type argument in position 1 (expecting
struct): #f
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
scheme@(guile-user) [1]> ,bt
In system/base/compile.scm:
352:28 5 (compile _ #:from _ #:to _ #:env _ #:optimization-level _
#:warning-level _ #:opts _)
265:44 4 (_ _ _)
261:27 3 (_ _ _)
In language/tree-il/compile-bytecode.scm:
1386:14 2 (compile-bytecode #<tree-il (primcall not (primcall list (const 1)
(const 2)))> #<module (#{ g446}#) …> …)
412:30 1 (_ _)
In ice-9/boot-9.scm:
1685:16 0 (raise-exception _ #:continuable? _)
scheme@(guile-user) [1]> (version)
$4 = "3.0.8"
--8<---------------cut here---------------end--------------->8---
The exception is raised in the ‘predicate?’ call below, where
(lookup-primitive 'list) returns #f:
(define (finish-conditional exp)
(define (true? x) (match x (($ <const> _ val) val) (_ #f)))
(define (false? x) (match x (($ <const> _ val) (not val)) (_ #f)))
(define (predicate? name) (primitive-predicate? (lookup-primitive name)))
(match exp
(($ <conditional> src ($ <conditional> _ test (? true?) (? false?))
consequent alternate)
(finish-conditional (make-conditional src test consequent alternate)))
(($ <conditional> src ($ <conditional> _ test (? false?) (? true?))
consequent alternate)
(finish-conditional (make-conditional src test alternate consequent)))
(($ <conditional> src ($ <primcall> _ (? predicate?)))
exp)
(($ <conditional> src test consequent alternate)
(make-conditional src (make-primcall src 'false? (list test))
alternate consequent))))
I believe this is fixed by changing ‘predicate?’ to:
(define (predicate? name)
(and=> (lookup-primitive name) primitive-predicate?))
Thoughts?
Ludo’.
