1 files changed, 15 insertions, 0 deletions
diff --git a/cont.c b/cont.c
index c164a3554b..fb0959d1b9 100644
--- a/cont.c
+++ b/cont.c
@@ -1422,6 +1422,21 @@ rb_fiber_s_current(VALUE klass)
     return rb_fiber_current();
 }
 
+
+
+/*
+ *  Document-class: FiberError
+ *
+ *  Raised when an invalid operation is attempted on a Fiber, in
+ *  particular when attempting to call/resume a dead fiber,
+ *  attempting to yield from the root fiber, or calling a fiber across
+ *  threads.
+ *
+ *     fiber = Fiber.new{}
+ *     fiber.resume #=> nil
+ *     fiber.resume #=> FiberError: dead fiber called
+ */
+
 void
 Init_Cont(void)
 {