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// revisions: current next
//[next] compile-flags: -Znext-solver
fn changer<'a>(mut things: Box<dyn Iterator<Item=&'a mut u8>>) {
for item in *things { *item = 0 }
//[current]~^ ERROR the size for values of type
//[next]~^^ ERROR the trait bound `dyn Iterator<Item = &'a mut u8>: IntoIterator` is not satisfied
//[next]~| ERROR the size for values of type `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` cannot be known at compilation time
//[next]~| ERROR the type `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not well-formed
//[next]~| ERROR `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not an iterator
//[next]~| ERROR the type `&mut <dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not well-formed
//[next]~| ERROR the size for values of type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be known at compilation time
//[next]~| ERROR the type `Option<<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item>` is not well-formed
//[next]~| ERROR the size for values of type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be known at compilation time
//[next]~| ERROR type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be dereferenced
// FIXME(-Znext-solver): these error messages are horrible and have to be
// improved before we stabilize the new solver.
}
fn main() {}
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