1 files changed, 136 insertions, 0 deletions
diff --git a/tests/ui/nll/user-annotations/patterns.rs b/tests/ui/nll/user-annotations/patterns.rs
new file mode 100644
index 00000000000..1f635d7f50c
--- /dev/null
+++ b/tests/ui/nll/user-annotations/patterns.rs
@@ -0,0 +1,136 @@
+// Test that various patterns also enforce types.
+
+fn variable_no_initializer() {
+    let x = 22;
+    let y: &'static u32;
+    y = &x; //~ ERROR
+}
+
+fn tuple_no_initializer() {
+
+
+    let x = 22;
+    let (y, z): (&'static u32, &'static u32);
+    y = &x; //~ ERROR
+}
+
+fn ref_with_ascribed_static_type() -> u32 {
+    // Check the behavior in some wacky cases.
+    let x = 22;
+    let y = &x; //~ ERROR
+    let ref z: &'static u32 = y;
+    **z
+}
+
+fn ref_with_ascribed_any_type() -> u32 {
+    let x = 22;
+    let y = &x;
+    let ref z: &u32 = y;
+    **z
+}
+
+struct Single<T> { value: T }
+
+fn struct_no_initializer() {
+
+
+    let x = 22;
+    let Single { value: y }: Single<&'static u32>;
+    y = &x; //~ ERROR
+}
+
+
+fn struct_no_initializer_must_normalize() {
+    trait Indirect { type Assoc; }
+    struct StaticU32;
+    impl Indirect for StaticU32 { type Assoc = &'static u32; }
+    struct Single2<T: Indirect> { value: <T as Indirect>::Assoc }
+
+    let x = 22;
+    let Single2 { value: mut _y }: Single2<StaticU32>;
+    _y = &x; //~ ERROR
+}
+
+fn variable_with_initializer() {
+    let x = 22;
+    let y: &'static u32 = &x; //~ ERROR
+}
+
+fn underscore_with_initializer() {
+    let x = 22;
+    let _: &'static u32 = &x; //~ ERROR
+
+    let _: Vec<&'static String> = vec![&String::new()];
+    //~^ ERROR temporary value dropped while borrowed [E0716]
+
+    let (_, a): (Vec<&'static String>, _) = (vec![&String::new()], 44);
+    //~^ ERROR temporary value dropped while borrowed [E0716]
+
+    let (_a, b): (Vec<&'static String>, _) = (vec![&String::new()], 44);
+    //~^ ERROR temporary value dropped while borrowed [E0716]
+}
+
+fn pair_underscores_with_initializer() {
+    let x = 22;
+    let (_, _): (&'static u32, u32) = (&x, 44); //~ ERROR
+}
+
+fn pair_variable_with_initializer() {
+    let x = 22;
+    let (y, _): (&'static u32, u32) = (&x, 44); //~ ERROR
+}
+
+fn struct_single_field_variable_with_initializer() {
+    let x = 22;
+    let Single { value: y }: Single<&'static u32> = Single { value: &x }; //~ ERROR
+}
+
+fn struct_single_field_underscore_with_initializer() {
+    let x = 22;
+    let Single { value: _ }: Single<&'static u32> = Single { value: &x }; //~ ERROR
+}
+
+struct Double<T> { value1: T, value2: T }
+
+fn struct_double_field_underscore_with_initializer() {
+    let x = 22;
+    let Double { value1: _, value2: _ }: Double<&'static u32> = Double {
+        value1: &x, //~ ERROR
+        value2: &44,
+    };
+}
+
+fn static_to_a_to_static_through_variable<'a>(x: &'a u32) -> &'static u32 {
+
+
+
+
+
+
+    let y: &'a u32 = &22;
+    y //~ ERROR
+}
+
+fn static_to_a_to_static_through_tuple<'a>(x: &'a u32) -> &'static u32 {
+
+
+
+
+
+
+
+    let (y, _z): (&'a u32, u32) = (&22, 44);
+    y //~ ERROR
+}
+
+fn static_to_a_to_static_through_struct<'a>(_x: &'a u32) -> &'static u32 {
+    let Single { value: y }: Single<&'a u32> = Single { value: &22 };
+    y //~ ERROR
+}
+
+fn a_to_static_then_static<'a>(x: &'a u32) -> &'static u32 {
+    let (y, _z): (&'static u32, u32) = (x, 44); //~ ERROR
+    y
+}
+
+fn main() { }