Tidying up tests/ui/issues tests [2/N]

tests/ui/mismatched_types/assignment-mismatch-various-types.rs

@@ -0,0 +1,9 @@
+//! regression test for <https://github.com/rust-lang/rust/issues/3477>
+
+fn main() {
+    let x: u32 = ();
+    //~^ ERROR mismatched types
+
+    let _p: char = 100;
+    //~^ ERROR mismatched types
+}

tests/ui/mismatched_types/assignment-mismatch-various-types.stderr

@@ -0,0 +1,19 @@
+error[E0308]: mismatched types
+  --> $DIR/assignment-mismatch-various-types.rs:4:18
+   |
+LL |     let x: u32 = ();
+   |            ---   ^^ expected `u32`, found `()`
+   |            |
+   |            expected due to this
+
+error[E0308]: mismatched types
+  --> $DIR/assignment-mismatch-various-types.rs:7:20
+   |
+LL |     let _p: char = 100;
+   |             ----   ^^^ expected `char`, found `u8`
+   |             |
+   |             expected due to this
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0308`.

tests/ui/issues/issue-3109.rs → tests/ui/str/debug-print-basic-tuple.rs

@@ -1,3 +1,4 @@
+//! regression test for <https://github.com/rust-lang/rust/issues/3109>
 //@ run-pass
 pub fn main() {
     println!("{:?}", ("hi there!", "you"));

tests/ui/issues/issue-51874.rs → tests/ui/type-inference/ambiguous-num-type-method-call.rs

@@ -1,3 +1,5 @@
+//! regression test for <https://github.com/rust-lang/rust/issues/51874>
+
 fn main() {
     let a = (1.0).pow(1.0); //~ ERROR can't call method `pow` on ambiguous numeric type
 }

tests/ui/issues/issue-51874.stderr → tests/ui/type-inference/ambiguous-num-type-method-call.stderr

@@ -1,5 +1,5 @@
 error[E0689]: can't call method `pow` on ambiguous numeric type `{float}`
-  --> $DIR/issue-51874.rs:2:19
+  --> $DIR/ambiguous-num-type-method-call.rs:4:19
    |
 LL |     let a = (1.0).pow(1.0);
    |                   ^^^

tests/ui/type-inference/type-inference-unconstrained-none.rs

@@ -1,5 +1,9 @@
 //! Regression test for <https://github.com/rust-lang/rust/issues/5062>.
 
+fn foo() {
+    format!("{:?}", None); //~ ERROR type annotations needed [E0282]
+}
+
 fn main() {
     None; //~ ERROR type annotations needed [E0282]
 }

tests/ui/type-inference/type-inference-unconstrained-none.stderr

@@ -1,5 +1,16 @@
 error[E0282]: type annotations needed
-  --> $DIR/type-inference-unconstrained-none.rs:4:5
+  --> $DIR/type-inference-unconstrained-none.rs:4:21
+   |
+LL |     format!("{:?}", None);
+   |                     ^^^^ cannot infer type of the type parameter `T` declared on the enum `Option`
+   |
+help: consider specifying the generic argument
+   |
+LL |     format!("{:?}", None::<T>);
+   |                         +++++
+
+error[E0282]: type annotations needed
+  --> $DIR/type-inference-unconstrained-none.rs:8:5
    |
 LL |     None;
    |     ^^^^ cannot infer type of the type parameter `T` declared on the enum `Option`
@@ -9,6 +20,6 @@ help: consider specifying the generic argument
 LL |     None::<T>;
    |         +++++
 
-error: aborting due to 1 previous error
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0282`.