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warning: function cannot return without recursing
--> $DIR/issue-91949-hangs-on-recursion.rs:23:1
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LL | / fn recurse<T>(elements: T) -> Vec<char>
LL | | where
LL | | T: Iterator<Item = ()>,
| |___________________________^ cannot return without recursing
LL | {
LL | recurse(IteratorOfWrapped(elements).map(|t| t.0))
| ------------------------------------------------- recursive call site
|
= help: a `loop` may express intention better if this is on purpose
= note: `#[warn(unconditional_recursion)]` on by default
error[E0275]: overflow evaluating the requirement `<std::iter::Empty<()> as Iterator>::Item == ()`
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= help: consider increasing the recursion limit by adding a `#![recursion_limit = "512"]` attribute to your crate (`issue_91949_hangs_on_recursion`)
note: required for `IteratorOfWrapped<(), std::iter::Empty<()>>` to implement `Iterator`
--> $DIR/issue-91949-hangs-on-recursion.rs:16:32
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LL | impl<T, I: Iterator<Item = T>> Iterator for IteratorOfWrapped<T, I> {
| -------- ^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^
| |
| unsatisfied trait bound introduced here
= note: 256 redundant requirements hidden
= note: required for `IteratorOfWrapped<(), Map<IteratorOfWrapped<(), Map<IteratorOfWrapped<(), Map<..., ...>>, ...>>, ...>>` to implement `Iterator`
= note: the full type name has been written to '$TEST_BUILD_DIR/traits/issue-91949-hangs-on-recursion/issue-91949-hangs-on-recursion.long-type-hash.txt'
error: aborting due to previous error; 1 warning emitted
For more information about this error, try `rustc --explain E0275`.
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