1 files changed, 88 insertions, 0 deletions
diff --git a/src/test/ui/lint/unused/issue-47390-unused-variable-in-struct-pattern.rs b/src/test/ui/lint/unused/issue-47390-unused-variable-in-struct-pattern.rs
new file mode 100644
index 000000000..4822a9b2c
--- /dev/null
+++ b/src/test/ui/lint/unused/issue-47390-unused-variable-in-struct-pattern.rs
@@ -0,0 +1,88 @@
+// check-pass
+
+#![feature(box_patterns)]
+
+#![warn(unused)] // UI tests pass `-A unused` (#43896)
+
+struct SoulHistory {
+    corridors_of_light: usize,
+    hours_are_suns: bool,
+    endless_and_singing: bool
+}
+
+struct LovelyAmbition {
+    lips: usize,
+    fire: usize
+}
+
+#[derive(Clone, Copy)]
+enum Large {
+    Suit { case: () }
+}
+
+struct Tuple(Large, ());
+
+fn main() {
+    let i_think_continually = 2; //~ WARNING unused variable: `i_think_continually`
+    let who_from_the_womb_remembered = SoulHistory {
+        corridors_of_light: 5,
+        hours_are_suns: true,
+        endless_and_singing: true
+    };
+
+    let mut mut_unused_var = 1;
+    //~^ WARNING unused variable: `mut_unused_var`
+    //~| WARNING variable does not need to be mutable
+
+    let (mut var, unused_var) = (1, 2);
+    //~^ WARNING unused variable: `var`
+    //~| WARNING unused variable: `unused_var`
+    //~| WARNING variable does not need to be mutable
+    // NOTE: `var` comes after `unused_var` lexicographically yet the warning
+    // for `var` will be emitted before the one for `unused_var`. We use an
+    // `IndexMap` to ensure this is the case instead of a `BTreeMap`.
+
+    if let SoulHistory { corridors_of_light, //~ WARNING unused variable: `corridors_of_light`
+                         mut hours_are_suns, //~ WARNING `hours_are_suns` is assigned to, but
+                         endless_and_singing: true } = who_from_the_womb_remembered {
+        hours_are_suns = false; //~ WARNING unused_assignments
+    }
+
+    let the_spirit = LovelyAmbition { lips: 1, fire: 2 };
+    let LovelyAmbition { lips, fire } = the_spirit; //~ WARNING unused variable: `fire`
+    println!("{}", lips);
+
+    let bag = Large::Suit {
+        case: ()
+    };
+
+    // Plain struct
+    match bag {
+        Large::Suit { case } => {} //~ WARNING unused variable: `case`
+    };
+
+    // Referenced struct
+    match &bag {
+        &Large::Suit { case } => {} //~ WARNING unused variable: `case`
+    };
+
+    // Boxed struct
+    match Box::new(bag) {
+        box Large::Suit { case } => {} //~ WARNING unused variable: `case`
+    };
+
+    // Tuple with struct
+    match (bag,) {
+        (Large::Suit { case },) => {} //~ WARNING unused variable: `case`
+    };
+
+    // Slice with struct
+    match [bag] {
+        [Large::Suit { case }] => {} //~ WARNING unused variable: `case`
+    };
+
+    // Tuple struct with struct
+    match Tuple(bag, ()) {
+        Tuple(Large::Suit { case }, ()) => {} //~ WARNING unused variable: `case`
+    };
+}