* load.c (load_lock): show backtrace at circular require.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23681 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/load.c b/load.c
index f6d27ac6a3..2c59f33041 100644
--- a/load.c
+++ b/load.c
@@ -379,7 +379,10 @@ load_lock(const char *ftptr)
 	st_insert(loading_tbl, (st_data_t)ftptr, data);
 	return (char *)ftptr;
     }
-    rb_warning("loading in progress, circular require considered harmful - %s", ftptr);
+    if (RTEST(ruby_verbose)) {
+	rb_warning("loading in progress, circular require considered harmful - %s", ftptr);
+	rb_backtrace();
+    }
     return RTEST(rb_barrier_wait((VALUE)data)) ? (char *)ftptr : 0;
 }