From 764c1d5e56ad34341c0bab8cad0e6c3fcb256179 Mon Sep 17 00:00:00 2001
From: Hadley Wickham <h.wickham@gmail.com>
Date: Sat, 9 Jul 2022 21:14:42 -0500
Subject: [PATCH] Only show inherited methods if they exist

Fixes #1371
---
 R/rd-r6.R                      | 4 +++-
 tests/testthat/_snaps/rd-r6.md | 6 ------
 2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/R/rd-r6.R b/R/rd-r6.R
index 2cb5bdd0..a70c8552 100644
--- a/R/rd-r6.R
+++ b/R/rd-r6.R
@@ -258,9 +258,11 @@ r6_inherited_method_list <- function(block, r6data) {
   self <- r6data$self
   super_meth <- super_meth[! super_meth$name %in% self$name, ]
   super_meth <- super_meth[! duplicated(super_meth$name), ]
+  if (nrow(super_meth) == 0) {
+    return()
+  }
 
   super_meth <- super_meth[rev(seq_len(nrow(super_meth))), ]
-
   details <- paste0(
     "<details",
     if (nrow(super_meth) <= 5) " open",
diff --git a/tests/testthat/_snaps/rd-r6.md b/tests/testthat/_snaps/rd-r6.md
index fbb7314e..b395e59f 100644
--- a/tests/testthat/_snaps/rd-r6.md
+++ b/tests/testthat/_snaps/rd-r6.md
@@ -28,12 +28,6 @@
       \item \href{#method-C2-meth1}{\code{C2$meth1()}}
       }
       }
-      \if{html}{\out{
-      <details open><summary>Inherited methods</summary>
-      <ul>
-      </ul>
-      </details>
-      }}
       \if{html}{\out{<hr>}}
       \if{html}{\out{<a id="method-C2-meth1"></a>}}
       \if{latex}{\out{\hypertarget{method-C2-meth1}{}}}