Allow more dead code

test_suite/tests/regression/issue2371.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code)]
+
 use serde_derive::Deserialize;
 
 #[derive(Deserialize)]

test_suite/tests/regression/issue2409.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code)]
+
 use serde_derive::Deserialize;
 
 macro_rules! bug {

test_suite/tests/regression/issue2844.rs

@@ -1,4 +1,4 @@
-#![allow(clippy::trivially_copy_pass_by_ref)]
+#![allow(clippy::trivially_copy_pass_by_ref, dead_code)]
 
 use serde_derive::{Deserialize, Serialize};
 

test_suite/tests/regression/issue2846.rs

@@ -1,4 +1,4 @@
-#![allow(clippy::trivially_copy_pass_by_ref)]
+#![allow(clippy::trivially_copy_pass_by_ref, dead_code)]
 
 use serde_derive::Deserialize;
 

test_suite/tests/test_borrow.rs

@@ -1,7 +1,10 @@
 #![allow(
     clippy::derive_partial_eq_without_eq,
     clippy::items_after_statements,
-    clippy::used_underscore_binding
+    clippy::used_underscore_binding,
+    // We use lots of declarations inside function bodies to avoid conflicts,
+    // but they aren't used. We just want to make sure they compile.
+    dead_code,
 )]
 
 use serde::de::value::{BorrowedStrDeserializer, MapDeserializer};

test_suite/tests/test_gen.rs

@@ -18,7 +18,10 @@
     clippy::ptr_arg,
     clippy::too_many_lines,
     clippy::trivially_copy_pass_by_ref,
-    clippy::type_repetition_in_bounds
+    clippy::type_repetition_in_bounds,
+    // We use lots of declarations inside function bodies to avoid conflicts,
+    // but they aren't used. We just want to make sure they compile.
+    dead_code,
 )]
 #![deny(clippy::collection_is_never_read)]
 

test_suite/tests/test_remote.rs

@@ -1,4 +1,4 @@
-#![allow(clippy::redundant_field_names)]
+#![allow(clippy::redundant_field_names, dead_code)]
 
 use serde_derive::{Deserialize, Serialize};
 

test_suite/tests/test_self.rs

@@ -1,4 +1,4 @@
-#![allow(clippy::used_underscore_binding)]
+#![allow(clippy::used_underscore_binding, dead_code)]
 
 use serde_derive::{Deserialize, Serialize};
 

test_suite/tests/ui/conflict/alias-enum.stderr

@@ -13,7 +13,7 @@ warning: unreachable pattern
 13 |         b: (),
    |         ^ no value can reach this
    |
-   = note: `#[warn(unreachable_patterns)]` on by default
+   = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
 
 warning: unreachable pattern
   --> tests/ui/conflict/alias-enum.rs:12:25

test_suite/tests/ui/conflict/alias.stderr

@@ -13,7 +13,7 @@ warning: unreachable pattern
 10 |     b: (),
    |     ^ no value can reach this
    |
-   = note: `#[warn(unreachable_patterns)]` on by default
+   = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
 
 warning: unreachable pattern
  --> tests/ui/conflict/alias.rs:9:21

test_suite/tests/ui/default-attribute/incorrect_type_newtype.stderr

@@ -2,10 +2,7 @@ error[E0308]: mismatched types
  --> tests/ui/default-attribute/incorrect_type_newtype.rs:6:19
   |
 6 | #[serde(default = "main")]
-  |                   ^^^^^^
+  |                   ^^^^^^ expected `Newtype`, found `()`
-  |                   |
-  |                   expected `Newtype`, found `()`
-  |                   expected due to this
 
 error[E0308]: `match` arms have incompatible types
  --> tests/ui/default-attribute/incorrect_type_newtype.rs:7:34

test_suite/tests/ui/default-attribute/incorrect_type_struct.stderr

@@ -2,10 +2,7 @@ error[E0308]: mismatched types
  --> tests/ui/default-attribute/incorrect_type_struct.rs:6:19
   |
 6 | #[serde(default = "main")]
-  |                   ^^^^^^
+  |                   ^^^^^^ expected `Struct`, found `()`
-  |                   |
-  |                   expected `Struct`, found `()`
-  |                   expected due to this
 
 error[E0308]: `match` arms have incompatible types
  --> tests/ui/default-attribute/incorrect_type_struct.rs:8:23

test_suite/tests/ui/default-attribute/incorrect_type_tuple.stderr

@@ -2,10 +2,7 @@ error[E0308]: mismatched types
  --> tests/ui/default-attribute/incorrect_type_tuple.rs:6:19
   |
 6 | #[serde(default = "main")]
-  |                   ^^^^^^
+  |                   ^^^^^^ expected `Tuple`, found `()`
-  |                   |
-  |                   expected `Tuple`, found `()`
-  |                   expected due to this
 
 error[E0308]: `match` arms have incompatible types
  --> tests/ui/default-attribute/incorrect_type_tuple.rs:7:36

test_suite/tests/ui/on_unimplemented.stderr

@@ -2,10 +2,15 @@ error[E0277]: the trait bound `MyStruct: Serialize` is not satisfied
   --> tests/ui/on_unimplemented.rs:21:15
    |
 21 |     to_string(&MyStruct);
-   |     --------- ^^^^^^^^^ the trait `Serialize` is not implemented for `MyStruct`
+   |     --------- ^^^^^^^^^ unsatisfied trait bound
    |     |
    |     required by a bound introduced by this call
    |
+help: the trait `Serialize` is not implemented for `MyStruct`
+  --> tests/ui/on_unimplemented.rs:18:1
+   |
+18 | struct MyStruct;
+   | ^^^^^^^^^^^^^^^
    = note: for local types consider adding `#[derive(serde::Serialize)]` to your `MyStruct` type
    = note: for types from other crates check whether the crate offers a `serde` feature flag
    = help: the following other types implement trait `Serialize`:
@@ -31,8 +36,13 @@ error[E0277]: the trait bound `MyStruct: Deserialize<'_>` is not satisfied
   --> tests/ui/on_unimplemented.rs:22:23
    |
 22 |     let _: MyStruct = from_str("");
-   |                       ^^^^^^^^^^^^ the trait `Deserialize<'_>` is not implemented for `MyStruct`
+   |                       ^^^^^^^^^^^^ unsatisfied trait bound
    |
+help: the trait `Deserialize<'_>` is not implemented for `MyStruct`
+  --> tests/ui/on_unimplemented.rs:18:1
+   |
+18 | struct MyStruct;
+   | ^^^^^^^^^^^^^^^
    = note: for local types consider adding `#[derive(serde::Deserialize)]` to your `MyStruct` type
    = note: for types from other crates check whether the crate offers a `serde` feature flag
    = help: the following other types implement trait `Deserialize<'de>`: