zeroize_derive: use of PhantomData #724
Description
I currently try to apply the zeroize v1.5 with the zeroize_derive feature.
I would like to use the zeroize_derive feature for a stuct which contains PhantomData, for example.
This fails to compile and displays following error message:
$ cargo test --features zeroize_derive
Compiling zeroize v1.5.1 (/home/alwagner/working_directory/projects/research/rust_crypto/utils/zeroize)
WARN rustc_metadata::locator no metadata found: incompatible metadata version found: '/home/alwagner/working_directory/projects/research/rust_crypto/utils/target/debug/deps/libzeroize_derive-b9ca4201b79543dd.so'
error[E0034]: multiple applicable items in scope
--> zeroize/tests/zeroize_derive.rs:20:27
|
20 | #[derive(Zeroize, ZeroizeOnDrop)]
| ^^^^^^^^^^^^^ multiple `zeroize_or_on_drop` found
|
= note: candidate #1 is defined in an impl of the trait `AssertZeroizeOnDrop` for the type `&mut T`
= note: candidate #2 is defined in an impl of the trait `AssertZeroize` for the type `T`
= note: this error originates in the derive macro `ZeroizeOnDrop` (in Nightly builds, run with -Z macro-backtrace for more info)
help: disambiguate the associated function for candidate #1
|
20 | #[derive(Zeroize, AssertZeroizeOnDrop::zeroize_or_on_drop(&mut ZeroizeOnDrop))]
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
help: disambiguate the associated function for candidate #2
|
20 | #[derive(Zeroize, AssertZeroize::zeroize_or_on_drop(&mut ZeroizeOnDrop))]
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error[E0034]: multiple applicable items in scope
--> zeroize/tests/zeroize_derive.rs:25:27
|
25 | #[derive(Zeroize, ZeroizeOnDrop)]
| ^^^^^^^^^^^^^ multiple `zeroize_or_on_drop` found
|
= note: candidate #1 is defined in an impl of the trait `AssertZeroizeOnDrop` for the type `&mut T`
= note: candidate #2 is defined in an impl of the trait `AssertZeroize` for the type `T`
= note: this error originates in the derive macro `ZeroizeOnDrop` (in Nightly builds, run with -Z macro-backtrace for more info)
help: disambiguate the associated function for candidate #1
|
25 | #[derive(Zeroize, AssertZeroizeOnDrop::zeroize_or_on_drop(&mut ZeroizeOnDrop))]
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
help: disambiguate the associated function for candidate #2
|
25 | #[derive(Zeroize, AssertZeroize::zeroize_or_on_drop(&mut ZeroizeOnDrop))]
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For more information about this error, try `rustc --explain E0034`.
error: could not compile `zeroize` due to 2 previous errors
Shall this even be supported or am I misusing this feature? (FYI: I created a draft PR on my fork to test a bit.)