-*- Outline -*-

Once (system vm assemble) is compiled, things start to fail in
unpredictable ways.

* `compile-file' of non-closure-using programs works

$ guile-disasm t-records.go > t-records.ref.asm
...
$ diff -uBb t-macros.*.asm
$ diff -uBb t-records.*.asm
$ diff -uBb t-global-bindings.*.asm

* `compile-file' of closure-using programs fails

ERROR: During compiling t-closure.scm:
ERROR: VM: Wrong type to apply: #(<venv> ((parent . #(<venv> ((parent . #f) (nexts . 1) (closure? . #f)))) (nexts . 0) (closure? . #f))) [IP offset: 28]

guile> (vm-debugger (the-vm))
debug> bt
#1 #<variable 30b12468 value: (#(<glil-asm> #(<glil-vars> ((nargs . 0) (nrest . 0) (nlocs . 0) (nexts . 1))) (#(<glil-const> 2) #(<glil-bind> ((x external 0))) #(<glil-external> set 0 0) #(<glil-asm> #(<glil-vars> ((nargs . 0) (nrest . 0) (nlocs . 1) (nexts . 0))) (#(<glil-module> ref #f +) #(<glil-const> 1) #(<glil-external> ref 1 0) #(<glil-call> call 2) #(<glil-source> (2 . 15)) #(<glil-bind> ((x++ local 0))) #(<glil-local> set 0) #(<glil-local> ref 0) #(<glil-external> set 1 0) #(<glil-local> ref 0) #(<glil-call> return 0) #(<glil-unbind>))) #(<glil-call> return 0) #(<glil-unbind>))) #<directory (guile-user) 100742d0> ())>
#2 (#<program 30ae74b8> #(<glil-vars> ...) (#(<glil-const> ...) #(<glil-bind> ...) ...))   
#3 (#<program 30af7090>)
#4 (#<program 30af94c0> #(<glil-vars> ...) (#(<glil-module> ...) #(<glil-const> ...) ...)) 
#5 (#<program 30b00108>)
#6 (#<program 30b02590> ref ...)
#7 (_l 1 #(<venv> ...))
guile> (vm-debugger (the-vm))
debug> stack
(#t closure? #(<venv> ((parent . #(<venv> ((parent . #f) (nexts . 1) (closure? . #f)))) (nexts . 0) (closure? . #f))) #<procedure #f (struct name val)> #<primitive-generic map> #<primitive-generic map> #<program 30998470>)

* Compiling anything "by hand" fails

** Example 1:  the read/compile/run loop

guile> (set! %load-path (cons "/home/ludo/src/guile-vm/module" %load-path))
guile> (use-modules (system vm assemble)(system vm core)(system repl repl))
guile> (start-repl 'scheme)
Guile Scheme interpreter 0.5 on Guile 1.7.2
Copyright (C) 2001 Free Software Foundation, Inc.

Enter `,help' for help.
scheme@guile-user> (use-modules (ice-9 match)
	     (system base syntax)
	     (system vm assemble))

(define (%preprocess x e)
  (match x
    (($ <glil-asm> vars body)
     (let* ((venv (<venv> :parent e :nexts (slot vars 'nexts) :closure? #f))
	    (body (map (lambda (x) (preprocess x venv)) body)))
       (<vm-asm> :venv venv :glil x :body body)))
    (($ <glil-external> op depth index)
     (do ((d depth (1- d))
	  (e e (slot e 'parent)))
	 ((= d 0))
       (set! (slot e 'closure?) #t))
     x)
    (else x)))

scheme@guile-user> preprocess
#<procedure preprocess (x e)>
scheme@guile-user> (getpid)
470
scheme@guile-user> (set! preprocess %preprocess)
scheme@guile-user> preprocess
ERROR: VM: Unbound variable: #<variable 30a0d5e0 value: #<undefined>>
scheme@guile-user> getpid
ERROR: VM: Unbound variable: #<variable 30a0d5e0 value: #<undefined>>
scheme@guile-user>


** Example 2:  the test suite (which also reads/compiles/runs)

All the closure-using tests fail.

ludo@lully:~/src/guile-vm/testsuite $ make check
../src/guile-vm -L ../module            \
            -l run-vm-tests.scm -e run-vm-tests \
            t-global-bindings.scm t-closure.scm t-closure2.scm t-closure3.scm t-do-loop.scm t-macros.scm t-proc-with-setter.scm t-values.scm t-records.scm t-match.scm

running `t-global-bindings.scm'...  reading...  compiling...  running...  ok
running `t-closure.scm'...  reading...  compiling...  [vm-error/(vm-run VM: Wrong type to apply: ~S [IP offset: ~a] (#(<venv> ((parent . #(<venv> ((parent . #f) (nexts . 1) (closure? . #f)))) (nexts . 0) (closure? . #f))) 28))] FAILED
running `t-closure2.scm'...  reading...  compiling...  [vm-error/(vm-run VM: Wrong type to apply: ~S [IP offset: ~a] (#(<venv> ((parent . #(<venv> ((parent . #(<venv> ((parent . #f) (nexts . 0) (closure? . #f)))) (nexts . 1) (closure? . #f)))) (nexts . 0) (closure? . #f))) 28))] FAILED
running `t-closure3.scm'...  reading...  compiling...  [vm-error/(vm-run VM: Wrong ype to apply: ~S [IP offset: ~a] (#(<venv> ((parent . #(<venv> ((parent . #(<venv> ((parent . #f) (nexts . 0) (closure? . #f)))) (nexts . 1) (closure? . #f)))) (nexts . 0) (closure? . #f))) 28))] FAILED
running `t-do-loop.scm'...  reading...  compiling...  [vm-error/(vm-run VM: Wrong type to apply: ~S [IP offset: ~a] (#(<venv> ((parent . #(<venv> ((parent . #f) (nexts . 1) (closure? . #f)))) (nexts . 0) (closure? . #f))) 28))] FAILED
running `t-macros.scm'...  reading...  compiling...  running...  ok
running `t-proc-with-setter.scm'...  reading...  compiling...  running...  ok
running `t-values.scm'...  reading...  compiling...  running...  ok
running `t-records.scm'...  reading...  compiling...  running...  ok
running `t-match.scm'...  reading...  compiling...  running...  ok

4 tests failed out of 10
make: *** [check] Error 4