Reorganize tests/ui/issues [21/N]

tests/ui/issues/issue-36474.rs → tests/ui/codegen/slice-iter-enumerate-opt.rs

@@ -1,4 +1,8 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/36474>.
+//! This used to trigger LLVM assertion when compiled with opt level 3.
+//@ compile-flags: -Copt-level=3
 //@ run-pass
+
 fn main() {
     remove_axis(&3, 0);
 }

tests/ui/issues/issue-3559.rs → tests/ui/collections/hashmap/hashmap-debug-format.rs

@@ -1,4 +1,7 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/3559>.
+//! Test hashmap debug format doesn't ICE.
 //@ run-pass
+
 use std::collections::HashMap;
 
 fn check_strs(actual: &str, expected: &str) -> bool {

tests/ui/derived-errors/no-spurious-unconstrained-param.rs

@@ -0,0 +1,16 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/36836>.
+//! Previously, in addition to the real cause of the problem as seen below,
+//! the compiler would tell the user:
+//!
+//! ```
+//! error[E0207]: the type parameter `T` is not constrained by the impl trait, self type, or
+//! predicates
+//! ```
+//!
+//! With this test, we check that only the relevant error is emitted.
+
+trait Foo {}
+
+impl<T> Foo for Bar<T> {} //~ ERROR cannot find type `Bar` in this scope
+
+fn main() {}

tests/ui/issues/issue-36836.stderr → tests/ui/derived-errors/no-spurious-unconstrained-param.stderr

@@ -1,5 +1,5 @@
 error[E0425]: cannot find type `Bar` in this scope
-  --> $DIR/issue-36836.rs:13:17
+  --> $DIR/no-spurious-unconstrained-param.rs:14:17
    |
 LL | impl<T> Foo for Bar<T> {}
    |                 ^^^ not found in this scope

tests/ui/issues/issue-36299.rs → tests/ui/generics/unused-type-and-lifetime-param.rs

@@ -1,3 +1,6 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/36299>.
+//! This used to ICE.
+
 struct Foo<'a, A> {}
 //~^ ERROR parameter `'a` is never used
 //~| ERROR parameter `A` is never used

tests/ui/issues/issue-36299.stderr → tests/ui/generics/unused-type-and-lifetime-param.stderr

@@ -1,13 +1,13 @@
 error[E0392]: lifetime parameter `'a` is never used
-  --> $DIR/issue-36299.rs:1:12
+  --> $DIR/unused-type-and-lifetime-param.rs:4:12
    |
 LL | struct Foo<'a, A> {}
    |            ^^ unused lifetime parameter
    |
    = help: consider removing `'a`, referring to it in a field, or using a marker such as `PhantomData`
 
 error[E0392]: type parameter `A` is never used
-  --> $DIR/issue-36299.rs:1:16
+  --> $DIR/unused-type-and-lifetime-param.rs:4:16
    |
 LL | struct Foo<'a, A> {}
    |                ^ unused type parameter

tests/ui/issues/issue-35570.rs → tests/ui/higher-ranked/trait-bounds/normalize-under-binder/assoc-type-projection-in-dyn-and-fn.rs

@@ -1,3 +1,7 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/35570>.
+//! Test associated type projection under `for<'a>` binder in the return
+//! type of fn parameter and inside trait object doesn't ICE.
+
 use std::mem;
 
 trait Trait1<T> {}

tests/ui/issues/issue-35570.stderr → tests/ui/higher-ranked/trait-bounds/normalize-under-binder/assoc-type-projection-in-dyn-and-fn.stderr

@@ -1,23 +1,23 @@
 error[E0277]: the trait bound `for<'a> (): Trait2<'a>` is not satisfied
-  --> $DIR/issue-35570.rs:8:40
+  --> $DIR/assoc-type-projection-in-dyn-and-fn.rs:12:40
    |
 LL | fn _ice(param: Box<dyn for <'a> Trait1<<() as Trait2<'a>>::Ty>>) {
    |                                        ^^^^^^^^^^^^^^^^^^^^^^ the trait `for<'a> Trait2<'a>` is not implemented for `()`
    |
 help: this trait has no implementations, consider adding one
-  --> $DIR/issue-35570.rs:4:1
+  --> $DIR/assoc-type-projection-in-dyn-and-fn.rs:8:1
    |
 LL | trait Trait2<'a> {
    | ^^^^^^^^^^^^^^^^
 
 error[E0277]: the trait bound `for<'a> (): Trait2<'a>` is not satisfied
-  --> $DIR/issue-35570.rs:8:16
+  --> $DIR/assoc-type-projection-in-dyn-and-fn.rs:12:16
    |
 LL | fn _ice(param: Box<dyn for <'a> Trait1<<() as Trait2<'a>>::Ty>>) {
    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `for<'a> Trait2<'a>` is not implemented for `()`
    |
 help: this trait has no implementations, consider adding one
-  --> $DIR/issue-35570.rs:4:1
+  --> $DIR/assoc-type-projection-in-dyn-and-fn.rs:8:1
    |
 LL | trait Trait2<'a> {
    | ^^^^^^^^^^^^^^^^

tests/ui/issues/issue-36744-bitcast-args-if-needed.rs → tests/ui/lifetimes/lifetime-param-in-fn-coercion.rs

@@ -1,7 +1,8 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/36744>.
+//! This tests for an ICE (and, if ignored, subsequent LLVM abort) when
+//! a lifetime-parametric fn is passed into a context whose expected
+//! type has a differing lifetime parameterization.
 //@ run-pass
-// This tests for an ICE (and, if ignored, subsequent LLVM abort) when
-// a lifetime-parametric fn is passed into a context whose expected
-// type has a differing lifetime parameterization.
 
 struct A<'a> {
     _a: &'a i32,

tests/ui/macros/macro-in-array-len-expr.rs

@@ -0,0 +1,10 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/36816>.
+//! Macro invocation in len position in arrays used to ICE.
+//@ run-pass
+
+macro_rules! m { () => { 1 } }
+macro_rules! n { () => { 1 + m!() } }
+
+fn main() {
+    let _: [u32; n!()] = [0, 0];
+}

tests/ui/issues/issue-3574.rs → tests/ui/match/match-borrowed-str.rs

@@ -1,6 +1,6 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/3574>.
+//! Test pattern-matching on `&str` doesn't ICE.
 //@ run-pass
-// rustc --test match_borrowed_str.rs.rs && ./match_borrowed_str.rs
-
 
 fn compare(x: &str, y: &str) -> bool {
     match x {

tests/ui/issues/issue-35976.rs → tests/ui/suggestions/trait-object-import-suggestion-on-method.rs

@@ -1,3 +1,6 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/35976>.
+//! This used to emit spurious `Sized` bound unsatisfied error when trait
+//! was not imported, instead of suggestion to import it.
 //@ edition:2015
 //@ revisions: imported unimported
 //@[imported] check-pass

tests/ui/issues/issue-35976.unimported.stderr → tests/ui/suggestions/trait-object-import-suggestion-on-method.unimported.stderr

@@ -1,5 +1,5 @@
 error: the `wait` method cannot be invoked on a trait object
-  --> $DIR/issue-35976.rs:21:9
+  --> $DIR/trait-object-import-suggestion-on-method.rs:24:9
    |
 LL |         fn wait(&self) where Self: Sized;
    |                                    ----- this has a `Sized` requirement

tests/ui/issues/issue-34503.rs → tests/ui/where-clauses/obligation-error-propagation.rs

@@ -1,4 +1,8 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/34503>.
+//! `(T, Option<T>)` falsly marked Option<T> as proved when T failed,
+//! this made use of invalid Option<T> bound possible anywhere.
 //@ run-pass
+
 fn main() {
     struct X;
     trait Foo<T> {

tests/ui/issues/issue-34503.stderr → tests/ui/where-clauses/obligation-error-propagation.stderr

@@ -1,5 +1,5 @@
 warning: methods `foo` and `bar` are never used
-  --> $DIR/issue-34503.rs:5:12
+  --> $DIR/obligation-error-propagation.rs:9:12
    |
 LL |     trait Foo<T> {
    |           --- methods in this trait