Add msrv check and make test pass

7 files changed, 188 insertions, 64 deletions

diff --git a/clippy_lints/src/lib.rs b/clippy_lints/src/lib.rs
index 39301b5344a..87329ee5e14 100644
--- a/clippy_lints/src/lib.rs
+++ b/clippy_lints/src/lib.rs
@@ -1073,7 +1073,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     });
     store.register_late_pass(|_| Box::new(manual_range_patterns::ManualRangePatterns));
     store.register_early_pass(|| Box::new(visibility::Visibility));
-    store.register_late_pass(|_| Box::new(tuple_array_conversions::TupleArrayConversions));
+    store.register_late_pass(move |_| Box::new(tuple_array_conversions::TupleArrayConversions { msrv: msrv() }));
     // add lints here, do not remove this comment, it's used in `new_lint`
 }
 
diff --git a/clippy_lints/src/tuple_array_conversions.rs b/clippy_lints/src/tuple_array_conversions.rs
index 9640083f764..9d5e872bd78 100644
--- a/clippy_lints/src/tuple_array_conversions.rs
+++ b/clippy_lints/src/tuple_array_conversions.rs
@@ -1,13 +1,23 @@
-use clippy_utils::{diagnostics::span_lint_and_help, is_from_proc_macro, path_to_local};
-use rustc_hir::*;
+use clippy_utils::{
+    diagnostics::span_lint_and_help,
+    is_from_proc_macro,
+    msrvs::{self, Msrv},
+    path_to_local,
+};
+use itertools::Itertools;
+use rustc_hir::{Expr, ExprKind, Node, Pat};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_middle::{lint::in_external_macro, ty};
-use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_session::{declare_tool_lint, impl_lint_pass};
+use std::iter::once;
 
 declare_clippy_lint! {
     /// ### What it does
+    /// Checks for tuple<=>array conversions that are not done with `.into()`.
     ///
     /// ### Why is this bad?
+    /// It's overly complex. `.into()` works for tuples<=>arrays with less than 13 elements and
+    /// conveys the intent a lot better, while also leaving less room for bugs!
     ///
     /// ### Example
     /// ```rust,ignore
@@ -22,16 +32,23 @@ declare_clippy_lint! {
     #[clippy::version = "1.72.0"]
     pub TUPLE_ARRAY_CONVERSIONS,
     complexity,
-    "default lint description"
+    "checks for tuple<=>array conversions that are not done with `.into()`"
+}
+impl_lint_pass!(TupleArrayConversions => [TUPLE_ARRAY_CONVERSIONS]);
+
+#[derive(Clone)]
+pub struct TupleArrayConversions {
+    pub msrv: Msrv,
 }
-declare_lint_pass!(TupleArrayConversions => [TUPLE_ARRAY_CONVERSIONS]);
 
 impl LateLintPass<'_> for TupleArrayConversions {
     fn check_expr<'tcx>(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) {
-        if !in_external_macro(cx.sess(), expr.span) {
+        if !in_external_macro(cx.sess(), expr.span) && self.msrv.meets(msrvs::TUPLE_ARRAY_CONVERSIONS) {
             _ = check_array(cx, expr) || check_tuple(cx, expr);
         }
     }
+
+    extract_msrv_attr!(LateContext);
 }
 
 fn check_array<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> bool {
@@ -42,15 +59,22 @@ fn check_array<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> bool {
         return false;
     }
 
-    if let Some(locals) = path_to_locals(cx, elements)
-        && locals.iter().all(|local| {
-            matches!(
-                local,
-                Node::Pat(pat) if matches!(
-                    cx.typeck_results().pat_ty(backtrack_pat(cx, pat)).peel_refs().kind(),
-                    ty::Tuple(_),
-                ),
-            )
+    if let Some(locals) = path_to_locals(cx, &elements.iter().collect_vec())
+        && let [first, rest @ ..] = &*locals
+        && let Node::Pat(first_pat) = first
+        && let first_id = parent_pat(cx, first_pat).hir_id
+        && rest.iter().chain(once(first)).all(|local| {
+            if let Node::Pat(pat) = local
+                && let parent = parent_pat(cx, pat)
+                && parent.hir_id == first_id
+            {
+                return matches!(
+                    cx.typeck_results().pat_ty(parent).peel_refs().kind(),
+                    ty::Tuple(len) if len.len() == elements.len()
+                );
+            }
+
+            false
         })
     {
         return emit_lint(cx, expr, ToType::Array);
@@ -66,15 +90,22 @@ fn check_array<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> bool {
                 None
             })
             .collect::<Option<Vec<&Expr<'_>>>>()
-        && let Some(locals) = path_to_locals(cx, elements)
-        && locals.iter().all(|local| {
-            matches!(
-                local,
-                Node::Pat(pat) if matches!(
-                    cx.typeck_results().pat_ty(backtrack_pat(cx, pat)).peel_refs().kind(),
-                    ty::Tuple(_),
-                ),
-            )
+        && let Some(locals) = path_to_locals(cx, &elements)
+        && let [first, rest @ ..] = &*locals
+        && let Node::Pat(first_pat) = first
+        && let first_id = parent_pat(cx, first_pat).hir_id
+        && rest.iter().chain(once(first)).all(|local| {
+            if let Node::Pat(pat) = local
+                && let parent = parent_pat(cx, pat)
+                && parent.hir_id == first_id
+            {
+                return matches!(
+                    cx.typeck_results().pat_ty(parent).peel_refs().kind(),
+                    ty::Tuple(len) if len.len() == elements.len()
+                );
+            }
+
+            false
         })
     {
         return emit_lint(cx, expr, ToType::Array);
@@ -83,6 +114,7 @@ fn check_array<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> bool {
     false
 }
 
+#[expect(clippy::cast_possible_truncation)]
 fn check_tuple<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> bool {
     let ExprKind::Tup(elements) = expr.kind else {
         return false;
@@ -90,15 +122,23 @@ fn check_tuple<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> bool {
     if !(1..=12).contains(&elements.len()) {
         return false;
     };
-    if let Some(locals) = path_to_locals(cx, elements)
-        && locals.iter().all(|local| {
-            matches!(
-                local,
-                Node::Pat(pat) if matches!(
-                    cx.typeck_results().pat_ty(backtrack_pat(cx, pat)).peel_refs().kind(),
-                    ty::Array(_, _),
-                ),
-            )
+
+    if let Some(locals) = path_to_locals(cx, &elements.iter().collect_vec())
+        && let [first, rest @ ..] = &*locals
+        && let Node::Pat(first_pat) = first
+        && let first_id = parent_pat(cx, first_pat).hir_id
+        && rest.iter().chain(once(first)).all(|local| {
+            if let Node::Pat(pat) = local
+                && let parent = parent_pat(cx, pat)
+                && parent.hir_id == first_id
+            {
+                return matches!(
+                    cx.typeck_results().pat_ty(parent).peel_refs().kind(),
+                    ty::Array(_, len) if len.eval_target_usize(cx.tcx, cx.param_env) as usize == elements.len()
+                );
+            }
+
+            false
         })
     {
         return emit_lint(cx, expr, ToType::Tuple);
@@ -114,15 +154,22 @@ fn check_tuple<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> bool {
                 None
             })
             .collect::<Option<Vec<&Expr<'_>>>>()
-        && let Some(locals) = path_to_locals(cx, elements.clone())
-        && locals.iter().all(|local| {
-            matches!(
-                local,
-                Node::Pat(pat) if cx.typeck_results()
-                    .pat_ty(backtrack_pat(cx, pat))
-                    .peel_refs()
-                    .is_array()
-            )
+        && let Some(locals) = path_to_locals(cx, &elements)
+        && let [first, rest @ ..] = &*locals
+        && let Node::Pat(first_pat) = first
+        && let first_id = parent_pat(cx, first_pat).hir_id
+        && rest.iter().chain(once(first)).all(|local| {
+            if let Node::Pat(pat) = local
+                && let parent = parent_pat(cx, pat)
+                && parent.hir_id == first_id
+            {
+                return matches!(
+                    cx.typeck_results().pat_ty(parent).peel_refs().kind(),
+                    ty::Array(_, len) if len.eval_target_usize(cx.tcx, cx.param_env) as usize == elements.len()
+                );
+            }
+
+            false
         })
     {
         return emit_lint(cx, expr, ToType::Tuple);
@@ -132,7 +179,7 @@ fn check_tuple<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> bool {
 }
 
 /// Walks up the `Pat` until it's reached the final containing `Pat`.
-fn backtrack_pat<'tcx>(cx: &LateContext<'tcx>, start: &'tcx Pat<'tcx>) -> &'tcx Pat<'tcx> {
+fn parent_pat<'tcx>(cx: &LateContext<'tcx>, start: &'tcx Pat<'tcx>) -> &'tcx Pat<'tcx> {
     let mut end = start;
     for (_, node) in cx.tcx.hir().parent_iter(start.hir_id) {
         if let Node::Pat(pat) = node {
@@ -144,12 +191,9 @@ fn backtrack_pat<'tcx>(cx: &LateContext<'tcx>, start: &'tcx Pat<'tcx>) -> &'tcx
     end
 }
 
-fn path_to_locals<'tcx>(
-    cx: &LateContext<'tcx>,
-    exprs: impl IntoIterator<Item = &'tcx Expr<'tcx>>,
-) -> Option<Vec<Node<'tcx>>> {
+fn path_to_locals<'tcx>(cx: &LateContext<'tcx>, exprs: &[&'tcx Expr<'tcx>]) -> Option<Vec<Node<'tcx>>> {
     exprs
-        .into_iter()
+        .iter()
         .map(|element| path_to_local(element).and_then(|local| cx.tcx.hir().find(local)))
         .collect()
 }
@@ -161,12 +205,19 @@ enum ToType {
 }
 
 impl ToType {
-    fn help(self) -> &'static str {
+    fn msg(self) -> &'static str {
         match self {
             ToType::Array => "it looks like you're trying to convert a tuple to an array",
             ToType::Tuple => "it looks like you're trying to convert an array to a tuple",
         }
     }
+
+    fn help(self) -> &'static str {
+        match self {
+            ToType::Array => "use `.into()` instead, or `<[T; N]>::from` if type annotations are needed",
+            ToType::Tuple => "use `.into()` instead, or `<(T0, T1, ..., Tn)>::from` if type annotations are needed",
+        }
+    }
 }
 
 fn emit_lint<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>, to_type: ToType) -> bool {
@@ -175,9 +226,9 @@ fn emit_lint<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>, to_type: ToTy
             cx,
             TUPLE_ARRAY_CONVERSIONS,
             expr.span,
-            to_type.help(),
+            to_type.msg(),
             None,
-            "use `.into()` instead",
+            to_type.help(),
         );
 
         return true;
diff --git a/clippy_lints/src/upper_case_acronyms.rs b/clippy_lints/src/upper_case_acronyms.rs
index 1d2d3eb12e1..4df1e3299ed 100644
--- a/clippy_lints/src/upper_case_acronyms.rs
+++ b/clippy_lints/src/upper_case_acronyms.rs
@@ -65,7 +65,7 @@ fn correct_ident(ident: &str) -> String {
 
     let mut ident = fragments.clone().next().unwrap();
     for (ref prev, ref curr) in fragments.tuple_windows() {
-        if [prev, curr]
+        if <[&String; 2]>::from((prev, curr))
             .iter()
             .all(|s| s.len() == 1 && s.chars().next().unwrap().is_ascii_uppercase())
         {
diff --git a/clippy_lints/src/utils/conf.rs b/clippy_lints/src/utils/conf.rs
index 972e24aac51..89063964622 100644
--- a/clippy_lints/src/utils/conf.rs
+++ b/clippy_lints/src/utils/conf.rs
@@ -294,7 +294,7 @@ define_Conf! {
     ///
     /// Suppress lints whenever the suggested change would cause breakage for other crates.
     (avoid_breaking_exported_api: bool = true),
-    /// Lint: MANUAL_SPLIT_ONCE, MANUAL_STR_REPEAT, CLONED_INSTEAD_OF_COPIED, REDUNDANT_FIELD_NAMES, OPTION_MAP_UNWRAP_OR, REDUNDANT_STATIC_LIFETIMES, FILTER_MAP_NEXT, CHECKED_CONVERSIONS, MANUAL_RANGE_CONTAINS, USE_SELF, MEM_REPLACE_WITH_DEFAULT, MANUAL_NON_EXHAUSTIVE, OPTION_AS_REF_DEREF, MAP_UNWRAP_OR, MATCH_LIKE_MATCHES_MACRO, MANUAL_STRIP, MISSING_CONST_FOR_FN, UNNESTED_OR_PATTERNS, FROM_OVER_INTO, PTR_AS_PTR, IF_THEN_SOME_ELSE_NONE, APPROX_CONSTANT, DEPRECATED_CFG_ATTR, INDEX_REFUTABLE_SLICE, MAP_CLONE, BORROW_AS_PTR, MANUAL_BITS, ERR_EXPECT, CAST_ABS_TO_UNSIGNED, UNINLINED_FORMAT_ARGS, MANUAL_CLAMP, MANUAL_LET_ELSE, UNCHECKED_DURATION_SUBTRACTION, COLLAPSIBLE_STR_REPLACE, SEEK_FROM_CURRENT, SEEK_REWIND, UNNECESSARY_LAZY_EVALUATIONS, TRANSMUTE_PTR_TO_REF, ALMOST_COMPLETE_RANGE, NEEDLESS_BORROW, DERIVABLE_IMPLS, MANUAL_IS_ASCII_CHECK, MANUAL_REM_EUCLID, MANUAL_RETAIN, TYPE_REPETITION_IN_BOUNDS.
+    /// Lint: MANUAL_SPLIT_ONCE, MANUAL_STR_REPEAT, CLONED_INSTEAD_OF_COPIED, REDUNDANT_FIELD_NAMES, OPTION_MAP_UNWRAP_OR, REDUNDANT_STATIC_LIFETIMES, FILTER_MAP_NEXT, CHECKED_CONVERSIONS, MANUAL_RANGE_CONTAINS, USE_SELF, MEM_REPLACE_WITH_DEFAULT, MANUAL_NON_EXHAUSTIVE, OPTION_AS_REF_DEREF, MAP_UNWRAP_OR, MATCH_LIKE_MATCHES_MACRO, MANUAL_STRIP, MISSING_CONST_FOR_FN, UNNESTED_OR_PATTERNS, FROM_OVER_INTO, PTR_AS_PTR, IF_THEN_SOME_ELSE_NONE, APPROX_CONSTANT, DEPRECATED_CFG_ATTR, INDEX_REFUTABLE_SLICE, MAP_CLONE, BORROW_AS_PTR, MANUAL_BITS, ERR_EXPECT, CAST_ABS_TO_UNSIGNED, UNINLINED_FORMAT_ARGS, MANUAL_CLAMP, MANUAL_LET_ELSE, UNCHECKED_DURATION_SUBTRACTION, COLLAPSIBLE_STR_REPLACE, SEEK_FROM_CURRENT, SEEK_REWIND, UNNECESSARY_LAZY_EVALUATIONS, TRANSMUTE_PTR_TO_REF, ALMOST_COMPLETE_RANGE, NEEDLESS_BORROW, DERIVABLE_IMPLS, MANUAL_IS_ASCII_CHECK, MANUAL_REM_EUCLID, MANUAL_RETAIN, TYPE_REPETITION_IN_BOUNDS, TUPLE_ARRAY_CONVERSIONS.
     ///
     /// The minimum rust version that the project supports
     (msrv: Option<String> = None),
diff --git a/clippy_utils/src/msrvs.rs b/clippy_utils/src/msrvs.rs
index 5aacca45146..1f70f11bd67 100644
--- a/clippy_utils/src/msrvs.rs
+++ b/clippy_utils/src/msrvs.rs
@@ -19,6 +19,7 @@ macro_rules! msrv_aliases {
 
 // names may refer to stabilized feature flags or library items
 msrv_aliases! {
+    1,71,0 { TUPLE_ARRAY_CONVERSIONS }
     1,70,0 { OPTION_IS_SOME_AND }
     1,68,0 { PATH_MAIN_SEPARATOR_STR }
     1,65,0 { LET_ELSE, POINTER_CAST_CONSTNESS }
diff --git a/tests/ui/tuple_array_conversions.rs b/tests/ui/tuple_array_conversions.rs
index 061c05e98d0..64aaa53be5c 100644
--- a/tests/ui/tuple_array_conversions.rs
+++ b/tests/ui/tuple_array_conversions.rs
@@ -1,5 +1,5 @@
 //@aux-build:proc_macros.rs:proc-macro
-#![allow(clippy::useless_vec, unused)]
+#![allow(clippy::no_effect, clippy::useless_vec, unused)]
 #![warn(clippy::tuple_array_conversions)]
 
 #[macro_use]
@@ -21,7 +21,9 @@ fn main() {
     let v2: Vec<[u32; 2]> = t1.iter().map(|&t| t.into()).collect();
     let t3: Vec<(u32, u32)> = v2.iter().map(|&v| v.into()).collect();
     let x = [1; 13];
-    let x = (x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7], x[8], x[9], x[10], x[11], x[12]);
+    let x = (
+        x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7], x[8], x[9], x[10], x[11], x[12],
+    );
     let x = [x.0, x.1, x.2, x.3, x.4, x.5, x.6, x.7, x.8, x.9, x.10, x.11, x.12];
     let x = (1, 2);
     let x = (x.0, x.1);
@@ -29,6 +31,18 @@ fn main() {
     let x = [x[0], x[1]];
     let x = vec![1, 2];
     let x = (x[0], x[1]);
+    let x = [1; 3];
+    let x = (x[0],);
+    let x = (1, 2, 3);
+    let x = [x.0];
+    let x = (1, 2);
+    let y = (1, 2);
+    [x.0, y.0];
+    [x.0, y.1];
+    // FP
+    let x = [x.0, x.0];
+    let x = (x[0], x[0]);
+    // How can this be fixed?
     external! {
         let t1: &[(u32, u32)] = &[(1, 2), (3, 4)];
         let v1: Vec<[u32; 2]> = t1.iter().map(|&(a, b)| [a, b]).collect();
@@ -41,3 +55,21 @@ fn main() {
         let t2: Vec<(u32, u32)> = v1.iter().map(|&[a, b]| (a, b)).collect();
     }
 }
+
+#[clippy::msrv = "1.70.0"]
+fn msrv_too_low() {
+    let x = [1, 2];
+    let x = (x[0], x[1]);
+    let x = [x.0, x.1];
+    let x = &[1, 2];
+    let x = (x[0], x[1]);
+}
+
+#[clippy::msrv = "1.71.0"]
+fn msrv_juust_right() {
+    let x = [1, 2];
+    let x = (x[0], x[1]);
+    let x = [x.0, x.1];
+    let x = &[1, 2];
+    let x = (x[0], x[1]);
+}
diff --git a/tests/ui/tuple_array_conversions.stderr b/tests/ui/tuple_array_conversions.stderr
index aba461e51f7..d9d59a611a0 100644
--- a/tests/ui/tuple_array_conversions.stderr
+++ b/tests/ui/tuple_array_conversions.stderr
@@ -4,7 +4,7 @@ error: it looks like you're trying to convert an array to a tuple
 LL |     let x = (x[0], x[1]);
    |             ^^^^^^^^^^^^
    |
-   = help: use `.into()` instead
+   = help: use `.into()` instead, or `<(T0, T1, ..., Tn)>::from` if type annotations are needed
    = note: `-D clippy::tuple-array-conversions` implied by `-D warnings`
 
 error: it looks like you're trying to convert a tuple to an array
@@ -13,7 +13,7 @@ error: it looks like you're trying to convert a tuple to an array
 LL |     let x = [x.0, x.1];
    |             ^^^^^^^^^^
    |
-   = help: use `.into()` instead
+   = help: use `.into()` instead, or `<[T; N]>::from` if type annotations are needed
 
 error: it looks like you're trying to convert an array to a tuple
   --> $DIR/tuple_array_conversions.rs:13:13
@@ -21,7 +21,7 @@ error: it looks like you're trying to convert an array to a tuple
 LL |     let x = (x[0], x[1]);
    |             ^^^^^^^^^^^^
    |
-   = help: use `.into()` instead
+   = help: use `.into()` instead, or `<(T0, T1, ..., Tn)>::from` if type annotations are needed
 
 error: it looks like you're trying to convert a tuple to an array
   --> $DIR/tuple_array_conversions.rs:16:53
@@ -29,7 +29,7 @@ error: it looks like you're trying to convert a tuple to an array
 LL |     let v1: Vec<[u32; 2]> = t1.iter().map(|&(a, b)| [a, b]).collect();
    |                                                     ^^^^^^
    |
-   = help: use `.into()` instead
+   = help: use `.into()` instead, or `<[T; N]>::from` if type annotations are needed
 
 error: it looks like you're trying to convert a tuple to an array
   --> $DIR/tuple_array_conversions.rs:17:38
@@ -37,7 +37,7 @@ error: it looks like you're trying to convert a tuple to an array
 LL |     t1.iter().for_each(|&(a, b)| _ = [a, b]);
    |                                      ^^^^^^
    |
-   = help: use `.into()` instead
+   = help: use `.into()` instead, or `<[T; N]>::from` if type annotations are needed
 
 error: it looks like you're trying to convert an array to a tuple
   --> $DIR/tuple_array_conversions.rs:18:55
@@ -45,7 +45,7 @@ error: it looks like you're trying to convert an array to a tuple
 LL |     let t2: Vec<(u32, u32)> = v1.iter().map(|&[a, b]| (a, b)).collect();
    |                                                       ^^^^^^
    |
-   = help: use `.into()` instead
+   = help: use `.into()` instead, or `<(T0, T1, ..., Tn)>::from` if type annotations are needed
 
 error: it looks like you're trying to convert a tuple to an array
   --> $DIR/tuple_array_conversions.rs:19:38
@@ -53,7 +53,47 @@ error: it looks like you're trying to convert a tuple to an array
 LL |     t1.iter().for_each(|&(a, b)| _ = [a, b]);
    |                                      ^^^^^^
    |
-   = help: use `.into()` instead
+   = help: use `.into()` instead, or `<[T; N]>::from` if type annotations are needed
 
-error: aborting due to 7 previous errors
+error: it looks like you're trying to convert a tuple to an array
+  --> $DIR/tuple_array_conversions.rs:43:13
+   |
+LL |     let x = [x.0, x.0];
+   |             ^^^^^^^^^^
+   |
+   = help: use `.into()` instead, or `<[T; N]>::from` if type annotations are needed
+
+error: it looks like you're trying to convert an array to a tuple
+  --> $DIR/tuple_array_conversions.rs:44:13
+   |
+LL |     let x = (x[0], x[0]);
+   |             ^^^^^^^^^^^^
+   |
+   = help: use `.into()` instead, or `<(T0, T1, ..., Tn)>::from` if type annotations are needed
+
+error: it looks like you're trying to convert an array to a tuple
+  --> $DIR/tuple_array_conversions.rs:71:13
+   |
+LL |     let x = (x[0], x[1]);
+   |             ^^^^^^^^^^^^
+   |
+   = help: use `.into()` instead, or `<(T0, T1, ..., Tn)>::from` if type annotations are needed
+
+error: it looks like you're trying to convert a tuple to an array
+  --> $DIR/tuple_array_conversions.rs:72:13
+   |
+LL |     let x = [x.0, x.1];
+   |             ^^^^^^^^^^
+   |
+   = help: use `.into()` instead, or `<[T; N]>::from` if type annotations are needed
+
+error: it looks like you're trying to convert an array to a tuple
+  --> $DIR/tuple_array_conversions.rs:74:13
+   |
+LL |     let x = (x[0], x[1]);
+   |             ^^^^^^^^^^^^
+   |
+   = help: use `.into()` instead, or `<(T0, T1, ..., Tn)>::from` if type annotations are needed
+
+error: aborting due to 12 previous errors