1 files changed, 21 insertions, 0 deletions
diff --git a/tests/ui/rfc-1445-restrict-constants-in-patterns/issue-6804.rs b/tests/ui/rfc-1445-restrict-constants-in-patterns/issue-6804.rs
new file mode 100644
index 00000000000..0260caa82cb
--- /dev/null
+++ b/tests/ui/rfc-1445-restrict-constants-in-patterns/issue-6804.rs
@@ -0,0 +1,21 @@
+// Matching against NaN should result in a warning
+
+#![allow(unused)]
+#![deny(illegal_floating_point_literal_pattern)]
+
+const NAN: f64 = f64::NAN;
+
+fn main() {
+    let x = NAN;
+    match x {
+        NAN => {}, //~ ERROR floating-point types cannot be used
+        //~| WARN this was previously accepted by the compiler but is being phased out
+        _ => {},
+    };
+
+    match [x, 1.0] {
+        [NAN, _] => {}, //~ ERROR floating-point types cannot be used
+        //~| WARN this was previously accepted by the compiler but is being phased out
+        _ => {},
+    };
+}