* vm.c (vm_backtrace_each): get rid of use of malloc from signal

  handler by using ruby_engine_name.  [ruby-core:29497]

* vm_eval.c (print_backtrace): file may be nil when segfaulted in
  very early stage.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27345 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 1 deletions

diff --git a/vm.c b/vm.c
index 678fcb8762..3a1e37f9ff 100644
--- a/vm.c
+++ b/vm.c
@@ -732,8 +732,9 @@ vm_backtrace_each(rb_thread_t *th, int lev, rb_backtrace_iter_func *iter, void *
 	}
 	else if (RUBYVM_CFUNC_FRAME_P(cfp)) {
 	    ID id;
+	    extern VALUE ruby_engine_name;
 
-	    if (NIL_P(file)) file = rb_str_new_cstr("ruby");
+	    if (NIL_P(file)) file = ruby_engine_name;
 	    if (cfp->me->def)
 		id = cfp->me->def->original_id;
 	    else