1 files changed, 36 insertions, 0 deletions
diff --git a/tests/ui/consts/issue-104396.rs b/tests/ui/consts/issue-104396.rs
new file mode 100644
index 000000000..315b0cf0f
--- /dev/null
+++ b/tests/ui/consts/issue-104396.rs
@@ -0,0 +1,36 @@
+// compile-flags: -Zmir-opt-level=3
+// check-pass
+
+#![feature(generic_const_exprs)]
+//~^ WARN the feature `generic_const_exprs` is incomplete
+
+#[inline(always)]
+fn from_fn_1<const N: usize, F: FnMut(usize) -> f32>(mut f: F) -> [f32; N] {
+    let mut result = [0.0; N];
+    let mut i = 0;
+    while i < N {
+        result[i] = f(i);
+        i += 1;
+    }
+    result
+}
+
+pub struct TestArray<const N: usize>
+where
+    [(); N / 2]:,
+{
+    array: [f32; N / 2],
+}
+
+impl<const N: usize> TestArray<N>
+where
+    [(); N / 2]:,
+{
+    fn from_fn_2<F: FnMut(usize) -> f32>(f: F) -> Self {
+        Self { array: from_fn_1(f) }
+    }
+}
+
+fn main() {
+    TestArray::<4>::from_fn_2(|i| 0.0);
+}