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-rw-r--r--doc/lispref/lists.texi2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/lispref/lists.texi b/doc/lispref/lists.texi
index f3758f5ce60..a509325854f 100644
--- a/doc/lispref/lists.texi
+++ b/doc/lispref/lists.texi
@@ -705,7 +705,7 @@ same way.
Normally, when @var{tree} is anything other than a cons cell,
@code{copy-tree} simply returns @var{tree}. However, if @var{vecp} is
non-@code{nil}, it copies vectors too (and operates recursively on
-their elements).
+their elements). This function cannot cope with circular lists.
@end defun
@defun flatten-tree tree