[beta] Beta backports

compiler/rustc_lint_defs/src/builtin.rs

@@ -790,6 +790,7 @@ declare_lint! {
     /// ### Example
     ///
     /// ```rust
+    /// #[warn(unused_macro_rules)]
     /// macro_rules! unused_empty {
     ///     (hello) => { println!("Hello, world!") }; // This rule is unused
     ///     () => { println!("empty") }; // This rule is used
@@ -814,7 +815,7 @@ declare_lint! {
     ///
     /// [`macro_export` attribute]: https://doc.rust-lang.org/reference/macros-by-example.html#path-based-scope
     pub UNUSED_MACRO_RULES,
-    Warn,
+    Allow,
     "detects macro rules that were not used"
 }
 

compiler/rustc_metadata/src/native_libs.rs

@@ -383,10 +383,11 @@ impl<'tcx> Collector<'tcx> {
                             // involved or not, library reordering and kind overriding without
                             // explicit `:rename` in particular.
                             if lib.has_modifiers() || passed_lib.has_modifiers() {
-                                self.tcx.sess.span_err(
-                                    self.tcx.def_span(lib.foreign_module.unwrap()),
-                                    "overriding linking modifiers from command line is not supported"
-                                );
+                                let msg = "overriding linking modifiers from command line is not supported";
+                                match lib.foreign_module {
+                                    Some(def_id) => self.tcx.sess.span_err(self.tcx.def_span(def_id), msg),
+                                    None => self.tcx.sess.err(msg),
+                                };
                             }
                             if passed_lib.kind != NativeLibKind::Unspecified {
                                 lib.kind = passed_lib.kind;

compiler/rustc_typeck/src/check/fn_ctxt/checks.rs

@@ -769,7 +769,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                                 let second_input_ty =
                                     self.resolve_vars_if_possible(expected_input_tys[second_idx]);
                                 let third_input_ty =
-                                    self.resolve_vars_if_possible(expected_input_tys[second_idx]);
+                                    self.resolve_vars_if_possible(expected_input_tys[third_idx]);
                                 let span = if third_idx < provided_arg_count {
                                     let first_arg_span = provided_args[first_idx].span;
                                     let third_arg_span = provided_args[third_idx].span;
@@ -810,16 +810,16 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             }
                             missing_idxs => {
                                 let first_idx = *missing_idxs.first().unwrap();
-                                let second_idx = *missing_idxs.last().unwrap();
+                                let last_idx = *missing_idxs.last().unwrap();
                                 // NOTE: Because we might be re-arranging arguments, might have extra arguments, etc.
                                 // It's hard to *really* know where we should provide this error label, so this is a
                                 // decent heuristic
-                                let span = if first_idx < provided_arg_count {
+                                let span = if last_idx < provided_arg_count {
                                     let first_arg_span = provided_args[first_idx].span;
-                                    let second_arg_span = provided_args[second_idx].span;
+                                    let last_arg_span = provided_args[last_idx].span;
                                     Span::new(
                                         first_arg_span.lo(),
-                                        second_arg_span.hi(),
+                                        last_arg_span.hi(),
                                         first_arg_span.ctxt(),
                                         None,
                                     )

src/test/ui/argument-suggestions/issue-97197.rs

@@ -0,0 +1,6 @@
+fn main() {
+    g((), ());
+    //~^ ERROR this function takes 6 arguments but 2 arguments were supplied
+}
+
+pub fn g(a1: (), a2: bool, a3: bool, a4: bool, a5: bool, a6: ()) -> () {}

src/test/ui/argument-suggestions/issue-97197.stderr

@@ -0,0 +1,19 @@
+error[E0061]: this function takes 6 arguments but 2 arguments were supplied
+  --> $DIR/issue-97197.rs:2:5
+   |
+LL |     g((), ());
+   |     ^-------- multiple arguments are missing
+   |
+note: function defined here
+  --> $DIR/issue-97197.rs:6:8
+   |
+LL | pub fn g(a1: (), a2: bool, a3: bool, a4: bool, a5: bool, a6: ()) -> () {}
+   |        ^ ------  --------  --------  --------  --------  ------
+help: provide the arguments
+   |
+LL |     g((), {bool}, {bool}, {bool}, {bool}, ());
+   |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0061`.

src/test/ui/argument-suggestions/missing_arguments.stderr

@@ -293,7 +293,7 @@ error[E0061]: this function takes 5 arguments but 2 arguments were supplied
   --> $DIR/missing_arguments.rs:39:3
    |
 LL |   complex(   1,                     ""   );
-   |   ^^^^^^^--------------------------------- three arguments of type `f32`, `i32`, and `i32` are missing
+   |   ^^^^^^^--------------------------------- three arguments of type `f32`, `i32`, and `f32` are missing
    |
 note: function defined here
   --> $DIR/missing_arguments.rs:7:4

src/test/ui/native-library-link-flags/modifiers-override-3.rs

@@ -0,0 +1,7 @@
+// Regression test for issue #97299, one command line library with modifiers
+// overrides another command line library with modifiers.
+
+// compile-flags:-lstatic:+whole-archive=foo -lstatic:+whole-archive=foo
+// error-pattern: overriding linking modifiers from command line is not supported
+
+fn main() {}

src/test/ui/native-library-link-flags/modifiers-override-3.stderr

@@ -0,0 +1,4 @@
+error: overriding linking modifiers from command line is not supported
+
+error: aborting due to previous error
+