Rollup merge of #99483 - compiler-errors:issue-99482, r=jyn514

Fix a numerical underflow in tuple wrap suggestion

Fixes #99482

I'm a clown, I rewrote the arg mismatch algo to use well-typed indices to avoid things like this, but then I added my own indexing bug, lol.

2 files changed, 24 insertions, 0 deletions

diff --git a/src/test/ui/argument-suggestions/issue-99482.rs b/src/test/ui/argument-suggestions/issue-99482.rs
new file mode 100644
index 00000000000..731b863069b
--- /dev/null
+++ b/src/test/ui/argument-suggestions/issue-99482.rs
@@ -0,0 +1,5 @@
+fn main() {
+    let f = |_: (), f: fn()| f;
+    let _f = f(main);
+    //~^ ERROR this function takes 2 arguments but 1 argument was supplied
+}
diff --git a/src/test/ui/argument-suggestions/issue-99482.stderr b/src/test/ui/argument-suggestions/issue-99482.stderr
new file mode 100644
index 00000000000..bc005e82a2c
--- /dev/null
+++ b/src/test/ui/argument-suggestions/issue-99482.stderr
@@ -0,0 +1,19 @@
+error[E0057]: this function takes 2 arguments but 1 argument was supplied
+  --> $DIR/issue-99482.rs:3:14
+   |
+LL |     let _f = f(main);
+   |              ^ ---- an argument of type `()` is missing
+   |
+note: closure defined here
+  --> $DIR/issue-99482.rs:2:13
+   |
+LL |     let f = |_: (), f: fn()| f;
+   |             ^^^^^^^^^^^^^^^^
+help: provide the argument
+   |
+LL |     let _f = f((), main);
+   |              ~~~~~~~~~~~
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0057`.