diff --git a/ices/99641.sh b/ices/99641.sh
new file mode 100755
index 00000000..0614ffb4
--- /dev/null
+++ b/ices/99641.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+rustc -Cdebuginfo=1 - <<'EOF'
+
+#![feature(adt_const_params)]
+
+fn main() {
+    pub struct Color<const WHITE: (fn(),)>;
+
+    impl<const WHITE: (fn(),)> Color<WHITE> {
+        /// Construct a new color
+        pub fn new() -> Self {
+            Color::<WHITE>
+        }
+    }
+
+    pub const D65: (fn(),) = (|| {},);
+
+    Color::<D65>::new();
+}
+
+EOF
+
diff --git a/ices/99642.rs b/ices/99642.rs
new file mode 100644
index 00000000..c8f52168
--- /dev/null
+++ b/ices/99642.rs
@@ -0,0 +1,5 @@
+fn test() -> impl Iterator<Item = impl Sized> {
+    Box::new(0..) as Box<dyn Iterator<Item = _>>
+}
+
+pub fn main() {}
diff --git a/ices/99647.sh b/ices/99647.sh
new file mode 100755
index 00000000..0e030948
--- /dev/null
+++ b/ices/99647.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+rustc --edition=2018 -Zcrate-attr="feature(generic_const_exprs)" - <<'EOF'
+
+#[allow(unused)]
+async fn foo<'a>() {
+    let _data = &mut [0u8; { 1 + 4 }];
+    bar().await
+}
+
+async fn bar() {}
+
+fn main() {}
+
+EOF
+
diff --git a/ices/99662.sh b/ices/99662.sh
new file mode 100755
index 00000000..3b5edd9a
--- /dev/null
+++ b/ices/99662.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+rustc "-Zcrate-attr=feature(with_negative_coherence)" - <<'EOF'
+
+#![feature(negative_impls)]
+
+// FIXME: this should compile
+
+trait MyPredicate<'a> {}
+impl<'a, T> !MyPredicate<'a> for &T where T: 'a {}
+trait MyTrait<'a> {}
+impl<'a, T: MyPredicate<'a>> MyTrait<'a> for T {}
+impl<'a, T> MyTrait<'a> for &'a T {}
+//~^ ERROR: conflicting implementations of trait `MyTrait<'_>` for type `&_`
+
+fn main() {}
+
+EOF
+