diff --git a/tests/crashes/126896.rs b/tests/crashes/126896.rs
new file mode 100644
index 00000000000..35bf9d5207a
--- /dev/null
+++ b/tests/crashes/126896.rs
@@ -0,0 +1,17 @@
+//@ known-bug: rust-lang/rust#126896
+//@ compile-flags: -Zpolymorphize=on -Zinline-mir=yes
+
+#![feature(type_alias_impl_trait)]
+type Two<'a, 'b> = impl std::fmt::Debug;
+
+fn set(x: &mut isize) -> isize {
+    *x
+}
+
+fn d(x: Two) {
+    let c1 = || set(x);
+    c1;
+}
+
+fn main() {
+}
diff --git a/tests/crashes/126939.rs b/tests/crashes/126939.rs
new file mode 100644
index 00000000000..1edf7484606
--- /dev/null
+++ b/tests/crashes/126939.rs
@@ -0,0 +1,21 @@
+//@ known-bug: rust-lang/rust#126939
+
+struct MySlice<T: Copy>(bool, T);
+type MySliceBool = MySlice<[bool]>;
+
+use std::mem;
+
+struct P2<T> {
+    a: T,
+    b: MySliceBool,
+}
+
+macro_rules! check {
+    ($t:ty, $align:expr) => ({
+        assert_eq!(mem::align_of::<$t>(), $align);
+    });
+}
+
+pub fn main() {
+    check!(P2<u8>, 1);
+}
diff --git a/tests/crashes/126942.rs b/tests/crashes/126942.rs
new file mode 100644
index 00000000000..e4adc8fab28
--- /dev/null
+++ b/tests/crashes/126942.rs
@@ -0,0 +1,11 @@
+//@ known-bug: rust-lang/rust#126942
+struct Thing;
+
+pub trait Every {
+    type Assoc;
+}
+impl<T: ?Sized> Every for Thing {
+    type Assoc = T;
+}
+
+static I: <Thing as Every>::Assoc = 3;
diff --git a/tests/crashes/126944.rs b/tests/crashes/126944.rs
new file mode 100644
index 00000000000..c0c5622e260
--- /dev/null
+++ b/tests/crashes/126944.rs
@@ -0,0 +1,38 @@
+//@ known-bug: rust-lang/rust#126944
+// Step 1: Create two names for a single type: `Thing` and `AlsoThing`
+
+struct Thing;
+struct Dummy;
+pub trait DummyTrait {
+    type DummyType;
+}
+impl DummyTrait for Dummy {
+    type DummyType = Thing;
+}
+type AlsoThing = <Dummy as DummyTrait>::DummyType;
+
+// Step 2: Create names for a single trait object type: `TraitObject` and `AlsoTraitObject`
+
+pub trait SomeTrait {
+    type Item;
+}
+type TraitObject = dyn SomeTrait<Item = AlsoThing>;
+type AlsoTraitObject = dyn SomeTrait<Item = Thing>;
+
+// Step 3: Force the compiler to check whether the two names are the same type
+
+pub trait Supertrait {
+    type Foo;
+}
+pub trait Subtrait: Supertrait<Foo = TraitObject> {}
+
+pub trait HasOutput<A: ?Sized> {
+    type Output;
+}
+
+fn foo<F>() -> F::Output
+where
+    F: HasOutput<dyn Subtrait<Foo = AlsoTraitObject>>,
+{
+    todo!()
+}
diff --git a/tests/crashes/126966.rs b/tests/crashes/126966.rs
new file mode 100644
index 00000000000..edeedc68c40
--- /dev/null
+++ b/tests/crashes/126966.rs
@@ -0,0 +1,29 @@
+//@ known-bug: rust-lang/rust#126966
+mod assert {
+    use std::mem::{Assume, BikeshedIntrinsicFrom};
+
+    pub fn is_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src>,
+    {
+    }
+}
+
+#[repr(u32)]
+enum Ox00 {
+    V = 0x00,
+}
+
+#[repr(C, packed(2))]
+enum OxFF {
+    V = 0xFF,
+}
+
+fn test() {
+    union Superset {
+        a: Ox00,
+        b: OxFF,
+    }
+
+    assert::is_transmutable::<Superset, Subset>();
+}
diff --git a/tests/crashes/126969.rs b/tests/crashes/126969.rs
new file mode 100644
index 00000000000..676563d059c
--- /dev/null
+++ b/tests/crashes/126969.rs
@@ -0,0 +1,9 @@
+//@ known-bug: rust-lang/rust#126969
+
+struct S<T> {
+    _: union { t: T },
+}
+
+fn f(S::<&i8> { .. }: S<&i8>) {}
+
+fn main() {}
diff --git a/tests/crashes/126982.rs b/tests/crashes/126982.rs
new file mode 100644
index 00000000000..8522d9415eb
--- /dev/null
+++ b/tests/crashes/126982.rs
@@ -0,0 +1,18 @@
+//@ known-bug: rust-lang/rust#126982
+
+#![feature(coerce_unsized)]
+use std::ops::CoerceUnsized;
+
+struct Foo<T: ?Sized> {
+    a: T,
+}
+
+impl<T, U> CoerceUnsized<U> for Foo<T> {}
+
+union U {
+    a: usize,
+}
+
+const C: U = Foo { a: 10 };
+
+fn main() {}
diff --git a/tests/crashes/127222.rs b/tests/crashes/127222.rs
new file mode 100644
index 00000000000..eda0ea3d9b7
--- /dev/null
+++ b/tests/crashes/127222.rs
@@ -0,0 +1,3 @@
+//@ known-bug: rust-lang/rust#127222
+#[marker]
+trait Foo = PartialEq<i32> + Send;
diff --git a/tests/crashes/127266.rs b/tests/crashes/127266.rs
new file mode 100644
index 00000000000..2bdbe03e373
--- /dev/null
+++ b/tests/crashes/127266.rs
@@ -0,0 +1,17 @@
+//@ known-bug: rust-lang/rust#127266
+#![feature(const_mut_refs)]
+#![feature(const_refs_to_static)]
+
+struct Meh {
+    x: &'static dyn UnsafeCell,
+}
+
+const MUH: Meh = Meh {
+    x: &mut *(READONLY as *mut _),
+};
+
+static READONLY: i32 = 0;
+
+trait UnsafeCell<'a> {}
+
+pub fn main() {}
diff --git a/tests/crashes/127299.rs b/tests/crashes/127299.rs
new file mode 100644
index 00000000000..7eb78387997
--- /dev/null
+++ b/tests/crashes/127299.rs
@@ -0,0 +1,12 @@
+//@ known-bug: rust-lang/rust#127299
+trait Qux {
+    fn bar() -> i32;
+}
+
+pub struct Lint {
+    pub desc: &'static Qux,
+}
+
+static FOO: &Lint = &Lint { desc: "desc" };
+
+fn main() {}
diff --git a/tests/crashes/127304.rs b/tests/crashes/127304.rs
new file mode 100644
index 00000000000..2975fc27f67
--- /dev/null
+++ b/tests/crashes/127304.rs
@@ -0,0 +1,20 @@
+//@ known-bug: rust-lang/rust #127304
+#![feature(adt_const_params)]
+
+trait Trait<T> {}
+impl Trait<u16> for () {}
+
+struct MyStr(str);
+impl std::marker::ConstParamTy for MyStr {}
+
+fn function_with_my_str<const S: &'static MyStr>() -> &'static MyStr {
+    S
+}
+
+impl MyStr {
+    const fn new(s: &Trait str) -> &'static MyStr {}
+}
+
+pub fn main() {
+    let f = function_with_my_str::<{ MyStr::new("hello") }>();
+}
diff --git a/tests/crashes/127332.rs b/tests/crashes/127332.rs
new file mode 100644
index 00000000000..5c14af01cec
--- /dev/null
+++ b/tests/crashes/127332.rs
@@ -0,0 +1,9 @@
+//@ known-bug: rust-lang/rust #127332
+
+async fn fun() {
+    enum Foo {
+        A { x: u32 },
+    }
+    let orig = Foo::A { x: 5 };
+    Foo::A { x: 6, ..orig };
+}