' -e:1:in `sym’ ## – C level backtrace information [NOTE] You may have encountered a bug in the Ruby interpreter. Bug reports are welcome. For details: [http://www.ruby-lang.org/bugreport.html](http://www.ruby-lang.org/bugreport.html) Abort trap ---

**Author:** ![nobu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e9c0ed/32.png) [@nobu](https://www.ruby-forum.com/u/nobu)\ **Post date:** [March 11, 2009, 12:17pm UTC](https://www.ruby-forum.com/t/bug-1267-dl-handle-sym-segfaults-with-nil/162554/2 "2009-03-11T12:17:56Z")

e$B%A%1%C%He(B #1267 e$B$,99?7$5$l$^$7$?!#e(B (by Nobuyoshi N.) e$B%9%F!\<%?%9e(B Opene$B$+$ie(BClosede$B$KJQ99e(B e$B?JD=e(B % 0e$B$+$ie(B100e$B$KJQ99e(B ## Applied in changeset r22891. [http://redmine.ruby-lang.org/issues/show/1267](http://redmine.ruby-lang.org/issues/show/1267) ---

**Author:** ![nobu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e9c0ed/32.png) [@nobu](https://www.ruby-forum.com/u/nobu)\ **Post date:** [March 11, 2009, 12:29pm UTC](https://www.ruby-forum.com/t/bug-1267-dl-handle-sym-segfaults-with-nil/162554/3 "2009-03-11T12:29:39Z")

e$B$J$+$@$G$9!#e(B At Wed, 11 Mar 2009 18:40:15 +0900, Nobuyoshi N. wrote in [ruby-dev:38150]: > DL::Handle#syme$B$K%7%s%%kL\>$H$7$Fe(Bnile$B$rEO$9$HBe$o$j$Ke(BRTLD\_NEXTe$B$r;He(B > e$B$&$h$&$K$J$C$F$$$^$9$,!"e(BRTLD\_NEXTe$B$,EO$;$k$N$O%7%s%%kL\>$G$O$J$/e(B > e$B$FBh0l0z?t$N%O%s%I%k$N$[$&$G$9!#e(B SEGVe$B$9$k$N$OLdBj$J$N$G$H$j$"$($:e(Bnile$B$N07$$$OH4$-$^$7$?!#e(B > e$B%O%s%I%k$K3:Ev$9$k$N$Oe(Bselfe$B$G$9$,!"$b$A$m$se(Bnile$B$OEO$7$h$&$,$G$-$Je(B > e$B$$$N$G%/%i%9%a%=%C%I$rDj5A$9$k$N$O$I$&$G$7$g$&$+!#e(B e$B$3$A$i$O2~$a$Fe(Bfeature requeste$B$H$$$&$3$H$G!#e(B # Index: ext/dl/handle.c — ext/dl/handle.c (revision 22891) +++ ext/dl/handle.c (working copy) @@ -130,17 +130,11 @@ rb\_dlhandle\_to\_i(VALUE self) } +static VALUE dlhandle\_sym(void \*handle, const char \*symbol); + VALUE rb\_dlhandle\_sym(VALUE self, VALUE sym) { - void (\*func)(); struct dl\_handle \*dlhandle; - void \*handle; const char \*name; -#if defined(HAVE\_DLERROR) - const char \*err; -# define CHECK\_DLERROR if( err = dlerror() ){ func = 0; } -#else -# define CHECK\_DLERROR -#endif - handle = dlhandle-\>ptr; - func = dlsym(handle, name); - return dlhandle\_sym(dlhandle-\>ptr, StringValuePtr(sym)); +} - +VALUE +rb\_dlhandle\_s\_sym(VALUE self, VALUE sym) +{ +#ifdef RTLD\_NEXT - void \*handle = RTLD\_NEXT; +#else - void \*handle = NULL; +#endif - rb\_secure(2); - return dlhandle\_sym(handle, StringValuePtr(sym)); +} - +static VALUE +dlhandle\_sym(void \*handle, const char \*name) +{ +#if defined(HAVE\_DLERROR) - const char \*err; +# define CHECK\_DLERROR if( err = dlerror() ){ func = 0; } +#else +# define CHECK\_DLERROR +#endif - void (\*func)() = dlsym(handle, name); - CHECK\_DLERROR; #if defined(FUNC\_STDCALL) @@ -209,4 +227,6 @@ Init\_dlhandle(void) rb\_cDLHandle = rb\_define\_class\_under(rb\_mDL, “Handle”, rb\_cObject); rb\_define\_alloc\_func(rb\_cDLHandle, rb\_dlhandle\_s\_allocate); - rb\_define\_singleton\_method(rb\_cDLHandle, “sym”, rb\_dlhandle\_s\_sym, 1); - rb\_define\_singleton\_method(rb\_cDLHandle, “[]”, rb\_dlhandle\_s\_sym, 1); rb\_define\_method(rb\_cDLHandle, “initialize”, rb\_dlhandle\_initialize, -1); rb\_define\_method(rb\_cDLHandle, “to\_i”, rb\_dlhandle\_to\_i, 0);