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more robust scm_exit_status

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* libguile/throw.c (scm_exit_status): In one of my bogus patches, I
  managed to make #<unspecified> reach this function, causing a segfault
  on SCM_CAR.  Refactor to be more robust.
This commit is contained in:
Andy Wingo 2011-11-04 13:35:19 +01:00
parent 148dfc2409
commit 58e68be4bb
1 changed files with 8 additions and 2 deletions
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10
libguile/throw.c
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@ -322,7 +322,7 @@ scm_handle_by_proc_catching_all (void *handler_data, SCM tag, SCM throw_args)
int
scm_exit_status (SCM args)
{
if (!SCM_NULL_OR_NIL_P (args))
if (scm_is_pair (args))
{
SCM cqa = SCM_CAR (args);
@ -330,8 +330,14 @@ scm_exit_status (SCM args)
return (scm_to_int (cqa));
else if (scm_is_false (cqa))
return EXIT_FAILURE;
else
return EXIT_SUCCESS;
}
return EXIT_SUCCESS;
else if (scm_is_null (args))
return EXIT_SUCCESS;
else
/* A type error. Strictly speaking we shouldn't get here. */
return EXIT_FAILURE;
}