From 8d09a58857f18975524b1797300ef3a65569d0d8 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sat, 14 Sep 2024 10:12:07 -0700
Subject: [PATCH] LaTeX writer: avoid error on `refs` div with empty citations.

If there are no citations, don't emit an empty CSLReferences
environment.

Closes #10185.
---
 src/Text/Pandoc/Writers/LaTeX.hs |  5 ++--
 test/command/10185.md            | 44 ++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 2 deletions(-)
 create mode 100644 test/command/10185.md

diff --git a/src/Text/Pandoc/Writers/LaTeX.hs b/src/Text/Pandoc/Writers/LaTeX.hs
index 76d180d35085..04e0ab3db4cb 100644
--- a/src/Text/Pandoc/Writers/LaTeX.hs
+++ b/src/Text/Pandoc/Writers/LaTeX.hs
@@ -375,8 +375,9 @@ blockToLaTeX (Div (identifier,classes,kvs) bs) = do
      then modify $ \st -> st{ stIncremental = True }
      else when (beamer && "nonincremental" `elem` classes) $
              modify $ \st -> st { stIncremental = False }
-  result <- if identifier == "refs" || -- <- for backwards compatibility
-               "csl-bib-body" `elem` classes
+  result <- if (identifier == "refs" || -- <- for backwards compatibility
+                "csl-bib-body" `elem` classes) &&
+               (not (null bs))
                then do
                  modify $ \st -> st{ stHasCslRefs = True }
                  inner <- blockListToLaTeX bs
diff --git a/test/command/10185.md b/test/command/10185.md
new file mode 100644
index 000000000000..27288a5a4b48
--- /dev/null
+++ b/test/command/10185.md
@@ -0,0 +1,44 @@
+```
+% pandoc -t latex --citeproc
+Lorem ipsum
+
+# References
+
+::: #refs
+:::
+^D
+Lorem ipsum
+
+\section{References}\label{references}
+```
+
+```
+% pandoc -t latex --citeproc
+---
+references:
+- id: foo
+  type: book
+  title: The Title
+  author: John Doe
+...
+
+Lorem ipsum [@foo].
+
+# References
+
+::: #refs
+:::
+^D
+Lorem ipsum (John Doe, n.d.).
+
+\section{References}\label{references}
+
+\phantomsection\label{refs}
+\begin{CSLReferences}{1}{0}
+\bibitem[\citeproctext]{ref-foo}
+John Doe. n.d. \emph{The Title}.
+
+\end{CSLReferences}
+
+```
+