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rust/tests/ui/specialization/issue-39448.stderr
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2026-03-24 20:00:26 +00:00

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error[E0391]: cycle detected when computing whether impls specialize one another
--> $DIR/issue-39448.rs:24:1
|
LL | impl<T: A, U: A + FromA<T>> FromA<T> for U {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: ...which requires evaluating trait selection obligation `u16: FromA<u8>`...
= note: ...which again requires computing whether impls specialize one another, completing the cycle
note: cycle used when building specialization graph of trait `FromA`
--> $DIR/issue-39448.rs:20:1
|
LL | trait FromA<T> {
| ^^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0391`.