Add more ICEs (#244)

* Add more ICEs

* code review

Author: JohnTitor

ices/66930.rs

@@ -0,0 +1,7 @@
+#![crate_type = "lib"]
+
+static UTF8_CHAR_WIDTH: [u8; 0] = [];
+
+pub fn utf8_char_width(b: u8) -> usize {
+    UTF8_CHAR_WIDTH[b as usize] as usize
+}

ices/67514.rs

@@ -0,0 +1,5 @@
+#![feature(or_patterns)]
+
+fn foo((Some(_) | None): Option<u32>) {}
+
+fn main() {}

ices/67552.rs

@@ -0,0 +1,27 @@
+fn main() {
+    rec(Empty);
+}
+
+struct Empty;
+
+impl Iterator for Empty {
+    type Item = ();
+    fn next<'a>(&'a mut self) -> core::option::Option<()> {
+        None
+    }
+}
+
+fn identity<T>(x: T) -> T {
+    x
+}
+
+fn rec<T>(mut it: T)
+where
+    T: Iterator,
+{
+    if () == () {
+        T::count(it);
+    } else {
+        rec(identity(&mut it))
+    }
+}

ices/67739.rs

@@ -0,0 +1,15 @@
+#![allow(incomplete_features)]
+#![feature(const_generics)]
+
+use std::mem;
+
+pub trait Trait {
+    type Associated : Sized;
+
+    fn associated_size(&self) -> usize {
+        [0u8; mem::size_of::<Self::Associated>()];
+        0   
+    }   
+}
+
+fn main() {}

ices/67830.rs

@@ -0,0 +1,25 @@
+trait MyFn<Arg> {
+    type Output;
+    fn call(&self, arg: Arg) -> Self::Output;
+}
+
+struct Wrap<F>(F);
+
+impl<A, B, F> MyFn<A> for Wrap<F>
+where
+    F: Fn(A) -> B
+{
+    type Output = B;
+
+    fn call(&self, arg: A) -> Self::Output {
+        (self.0)(arg)
+    }
+}
+
+
+struct A;
+fn test() -> impl for<'a> MyFn<&'a A, Output=impl Iterator + 'a> {
+    Wrap(|a| Some(a).into_iter())
+}
+
+fn main() {}

ices/67844.rs

@@ -0,0 +1,9 @@
+trait WithAssoc { type AssocType; }
+
+trait WithParam<A> {}
+
+type Return<A> = impl WithAssoc<AssocType = impl WithParam<A>>;
+
+fn my_fun() -> Return<()> {}
+
+fn main() {}

ices/67856.rs

@@ -0,0 +1,13 @@
+#![feature(unboxed_closures)]
+#![feature(type_alias_impl_trait)]
+#![feature(fn_traits)]
+
+trait MyTrait {}
+impl MyTrait for () {}
+
+impl<F> FnOnce<()> for &F {
+    type Output = impl MyTrait ;
+    fn call_once(self, _:() ) -> Self::Output { }
+}
+
+fn main() {}

ices/67858.rs

@@ -0,0 +1,13 @@
+#![feature(const_generics)]
+#![allow(incomplete_features)]
+
+pub trait Trait {
+    type Associated;
+}
+
+pub struct Foo<T, A = <T as Trait>::Associated, const N: u8>(T, A);
+
+impl<T: Trait, const N: u8> Foo<T, N> {
+}
+
+fn main() {}

ices/67883.rs

@@ -0,0 +1,18 @@
+#![feature(const_generics)]
+
+struct Caca<const A: &'static str> {
+    s: String
+}
+
+impl<const A: &str> Default for Caca<A> {
+    fn default() -> Self {
+        let a = Self::A;
+        Self {
+            s: A.to_string()
+        }
+    }
+}
+
+fn main() {
+    println!("Hello, world!");
+}