ICE: Not enough bound vars #130391
Description
auto-reduced (treereduce-rust):
fn main() {
let _ = for<'a> |x: &u8| -> &'a () { x };
}
original code
original:
#![feature(closure_lifetime_binder)]
fn main() {
// Implicit types
let _ = for<> || {}; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
let _ = for<'a> || -> &'a _ { &() }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
let _ = for<'a> |x| -> &'a () { x }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
let _ = for<'a> |x: &'a _| -> &'a () { x }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
let _ = for<'a> |x: &'a Vec::<_>| -> &'a Vec::<()> { x }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
let _ = for<'a> |x: &'a Vec<()>| -> &'a Vec<_> { x }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
let _ = for<'a> |x: &'a _| -> &'a &'a () { x }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
let _ = for<'a> |x: &'a _, y, z: _| -> &'a _ { //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
let _: &u8 = x;
let _: u32 = y;
let _: i32 = z;
x
};
// Lifetime elision
let _ = for<> |_: &()| -> () {}; //~ ERROR `&` without an explicit lifetime name cannot be used here
let _ = for<> |x: &()| -> &() { x }; //~ ERROR `&` without an explicit lifetime name cannot be used here
//~| ERROR `&` without an explicit lifetime name cannot be used here
let _ = for<> |x: &'_ ()| -> &'_ () { x }; //~ ERROR `'_` cannot be used here
//~| ERROR `'_` cannot be used here
let _ = for<'a> |x: &u8| -> &'a () { x }; //~ ERROR `&` without an explicit lifetime name cannot be used here
let _ = for<'a> |x: &'a ()| -> &() { x }; //~ ERROR `&` without an explicit lifetime name cannot be used here
//~^ ERROR: lifetime may not live long enough
}Version information
rustc 1.83.0-dev
binary: rustc
commit-hash: unknown
commit-date: unknown
host: x86_64-unknown-linux-gnu
release: 1.83.0-dev
LLVM version: 19.1.0
@rustbot label +F-closure_lifetime_binder