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-rw-r--r--vm_trace.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/vm_trace.c b/vm_trace.c
index 383f255799..6e2c058779 100644
--- a/vm_trace.c
+++ b/vm_trace.c
@@ -519,6 +519,10 @@ static void call_trace_func(rb_event_flag_t, VALUE data, VALUE self, ID id, VALU
* line prog.rb:3 test Test
* line prog.rb:4 test Test
* return prog.rb:4 test Test
+ *
+ * Note that for +c-call+ and +c-return+ events, the binding returned is the
+ * binding of the nearest Ruby method calling the C method, since C methods
+ * themselves do not have bindings.
*/
static VALUE