* bug#18065: guile hangs if strerror is called with invalid (non-int) argument @ 2014-07-20 15:25 Glenn Michaels 2014-08-01 19:47 ` Ian Price 2014-11-12 6:05 ` Mark H Weaver 0 siblings, 2 replies; 3+ messages in thread From: Glenn Michaels @ 2014-07-20 15:25 UTC (permalink / raw) To: 18065 Calling strerror with a non-integer argument causes guile to hang. e.g.: (strerror 1.5) It's a locking issue, which is solved by the following trivial patch: --- a/libguile/error.c +++ b/libguile/error.c @@ -121,10 +121,12 @@ SCM_DEFINE (scm_strerror, "strerror", 1, 0, 0, #define FUNC_NAME s_scm_strerror { SCM ret; + int errnum; scm_dynwind_begin (0); + errnum = scm_to_int (err); scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex); - ret = scm_from_locale_string (strerror (scm_to_int (err))); + ret = scm_from_locale_string (strerror (errnum)); scm_dynwind_end (); return ret; ^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#18065: guile hangs if strerror is called with invalid (non-int) argument 2014-07-20 15:25 bug#18065: guile hangs if strerror is called with invalid (non-int) argument Glenn Michaels @ 2014-08-01 19:47 ` Ian Price 2014-11-12 6:05 ` Mark H Weaver 1 sibling, 0 replies; 3+ messages in thread From: Ian Price @ 2014-08-01 19:47 UTC (permalink / raw) To: 18065 Your patch does solve this issue, but I'm not 100% why the problem occurs in the first place, as the lock should have been unlocked when the throw occurred. If I catch the wrong type error explicitly, then there is no problem. scheme@(guile-user)> (catch #t (lambda () (strerror 1.5)) list) $1 = (wrong-type-arg #f "Wrong type (expecting ~A): ~S" ("exact integer" 1.5) (1.5)) My thinking is that the a pre-unwind handler in the repl tries to lock the same mutex, but I haven't looked into this deeply enough. -- Ian Price -- shift-reset.com "Programming is like pinball. The reward for doing it well is the opportunity to do it again" - from "The Wizardy Compiled" ^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#18065: guile hangs if strerror is called with invalid (non-int) argument 2014-07-20 15:25 bug#18065: guile hangs if strerror is called with invalid (non-int) argument Glenn Michaels 2014-08-01 19:47 ` Ian Price @ 2014-11-12 6:05 ` Mark H Weaver 1 sibling, 0 replies; 3+ messages in thread From: Mark H Weaver @ 2014-11-12 6:05 UTC (permalink / raw) To: Glenn Michaels; +Cc: 18065-done Fixed in fda17c20a3d088fccab1671c8881bd217d83d5f6 on the stable-2.0 branch, which will become Guile 2.0.12. Thanks, Mark ^ permalink raw reply [flat|nested] 3+ messages in thread
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