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error: `impl` item signature doesn't match `trait` item signature
--> $DIR/self-without-lifetime-constraint.rs:46:5
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LL | fn column_result(value: ValueRef<'_>) -> FromSqlResult<Self, &Self>;
| -------------------------------------------------------------------- expected `fn(ValueRef<'1>) -> Result<(&'2 str, &'1 &'2 str), FromSqlError>`
...
LL | fn column_result(value: ValueRef<'_>) -> FromSqlResult<&str, &&str> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ found `fn(ValueRef<'1>) -> Result<(&'1 str, &'1 &'1 str), FromSqlError>`
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= note: expected signature `fn(ValueRef<'1>) -> Result<(&'2 str, &'1 &'2 str), FromSqlError>`
found signature `fn(ValueRef<'1>) -> Result<(&'1 str, &'1 &'1 str), FromSqlError>`
help: the lifetime requirements from the `impl` do not correspond to the requirements in the `trait`
--> $DIR/self-without-lifetime-constraint.rs:42:60
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LL | fn column_result(value: ValueRef<'_>) -> FromSqlResult<Self, &Self>;
| ^^^^ consider borrowing this type parameter in the trait
error[E0515]: cannot return value referencing function parameter `x`
--> $DIR/self-without-lifetime-constraint.rs:17:87
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LL | std::str::from_utf8(t).map_err(|_| FromSqlError::InvalidType).map(|x| (x, &x))
| ^^^^--^
| | |
| | `x` is borrowed here
| returns a value referencing data owned by the current function
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0515`.
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