2 files changed, 16 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/target/issue-5012/trailing_comma_always.rs b/src/tools/rustfmt/tests/target/issue-5012/trailing_comma_always.rs
new file mode 100644
index 000000000..ff9c40fbb
--- /dev/null
+++ b/src/tools/rustfmt/tests/target/issue-5012/trailing_comma_always.rs
@@ -0,0 +1,8 @@
+// rustfmt-trailing_comma: Always
+
+pub struct Matrix<T, const R: usize, const C: usize,>
+where
+    [T; R * C]:,
+{
+    contents: [T; R * C],
+}
diff --git a/src/tools/rustfmt/tests/target/issue-5012/trailing_comma_never.rs b/src/tools/rustfmt/tests/target/issue-5012/trailing_comma_never.rs
new file mode 100644
index 000000000..2fac8eae5
--- /dev/null
+++ b/src/tools/rustfmt/tests/target/issue-5012/trailing_comma_never.rs
@@ -0,0 +1,8 @@
+// rustfmt-trailing_comma: Never
+
+pub struct Matrix<T, const R: usize, const C: usize>
+where
+    [T; R * C]:
+{
+    contents: [T; R * C]
+}