bug#74210: No unbound variable warning when via 'export'

[Maxime Devos via "Bug reports for GUILE, GNU's Ubiquitous Extension Language" <bug-guile@gnu.org>]

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Forwarded e-mail/bug report from guile-devel

From: Tommi Höynälänmaa
Date: dinsdag 5 november 2024 8:25
To: guile-devel@gnu.org
Subject: Re: Exporting a nonexistent variable

Here is another example:

--- mod1.scm ---
(define-module (mod1))

(export myproc)

(define (myproc0)
   (display "Hello\n"))

--- end ---

--- mod2.scm ---
(define-module (mod2))

(export myproc2)

(use-modules (mod1))

(define (myproc2)
   (display "Hello again\n"))

--- end ---

--- program.scm ---
(use-modules (mod1)
              (mod2))

(define (main args)
   (myproc))

--- end ---

I compiled this example with the following commands:

--- cut here ---

export GUILE_LOAD_COMPILED_PATH=.
guild compile --warn=unbound-variable -o mod1.go mod1.scm
guild compile --warn=unbound-variable -o mod2.go mod2.scm

--- cut here ---

The compiler gives no warnings and running "guile -e main -s 
program.scm" gives the following error:

--- cut here ---

;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
;;;       or pass the --no-auto-compile argument to disable.
;;; compiling /home/tohoyn/tyo/omat/ohj/scheme/export-test3/program.scm
;;; compiled 
/home/tohoyn/git/savannah/guile/cache/guile/ccache/3.0-LE-8-4.7/home/tohoyn/tyo/omat/ohj/scheme/export-test3/program.scm.go
Backtrace:
In ice-9/boot-9.scm:
   1762:12  4 (with-exception-handler _ _ #:unwind? _ # _)
In unknown file:
            3 (apply-smob/0 #<thunk 7f2fda699300>)
In ice-9/boot-9.scm:
     731:2  2 (call-with-prompt _ _ #<procedure default-prompt-handle…>)
In ice-9/eval.scm:
     619:8  1 (_ #(#(#<directory (guile-user) 7f2fda69cc80>)))
In /home/tohoyn/tyo/omat/ohj/scheme/export-test3/program.scm:
       6:3  0 (main _)

/home/tohoyn/tyo/omat/ohj/scheme/export-test3/program.scm:6:3: In 
procedure main:
Unbound variable: myproc

--- cut here ---

      - Tommi Höynälänmaa

-- 
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