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error[E0391]: cycle detected when expanding type alias `X1`
--> $DIR/infinite-type-alias-mutual-recursion.rs:1:11
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LL | type X1 = X2;
| ^^
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note: ...which requires expanding type alias `X2`...
--> $DIR/infinite-type-alias-mutual-recursion.rs:3:11
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LL | type X2 = X3;
| ^^
note: ...which requires expanding type alias `X3`...
--> $DIR/infinite-type-alias-mutual-recursion.rs:4:11
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LL | type X3 = X1;
| ^^
= note: ...which again requires expanding type alias `X1`, completing the cycle
= note: type aliases cannot be recursive
= help: consider using a struct, enum, or union instead to break the cycle
= help: see <https://doc.rust-lang.org/reference/types.html#recursive-types> for more information
note: cycle used when collecting item types in top-level module
--> $DIR/infinite-type-alias-mutual-recursion.rs:1:1
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LL | / type X1 = X2;
LL | |
LL | | type X2 = X3;
LL | | type X3 = X1;
LL | |
LL | | fn main() {}
| |____________^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0391`.
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