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Re: No way out.

From: Marius Vollmer
Subject: Re: No way out.
Date: Wed, 07 Dec 2005 03:31:38 +0200
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux)

Bruce Korb <address@hidden> writes:

> On Sunday 04 December 2005 08:08 pm, Bruce Korb wrote:
>> Anyway,  *real bugs* in Guile 1.7.2 are:
>> 1.  When an error is thrown, "exit" should be called with EXIT_FAILURE, not 
>> 0.
> The problem here is that the doc for "gh_enter()" (and successors?) says
> that it does not return.  It does.  The error handling long jumps around
> my inner main and returns back to real main.  Oops.

Oops, indeed!  I fixed this.

My previous explanation was wrong: there should be no uncaught throws
unless there is some ither bug in Guile.  scm_with_guile, which is now
the main function for initializing Guile, establishes a catch all (via
scm_with_continuation_barrier).  However, that catch all does not exit
with pthread_exit, it simply makes scm_with_guile return NULL.  Bad.

2005-12-07  Marius Vollmer  <address@hidden>

        Reported by Bruce Korb:
        * init.c (invoke_main_func): Don't call exit here.  Throws that are
        only caught by scm_with_guile will bypass us and would cause
        scm_boot_guile to return erroneously.
        (scm_boot_guile): Expect scm_with_guile to return and call exit
        here, passing it an appropriate exit code.

GPG: D5D4E405 - 2F9B BCCC 8527 692A 04E3  331E FAF8 226A D5D4 E405

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