I have crate A
that depend on B
and B
depend on rust-nmea crate.
If I build crate A
I got bunch of errors (all of them that missed use std::error::Error;
) during build of rust-nmea dependency:
error[E0599]: no method named `description` found for type `nom::Err<&[u8]>` in the current scope
--> /home/evgeniy/.cargo/registry/src/github.com-1ecc6299db9ec823/nmea-0.0.6/src/parse.rs:100:44
|
100 | IError::Error(e) => e.description().to_string(),
| ^^^^^^^^^^^
|
= help: items from traits can only be used if the trait is in scope
= note: the following trait is implemented but not in scope, perhaps add a `use` for it:
candidate #1: `use std::error::Error;`
But if I go to source tree of B
crate and run cargo build
,
all build without any error (if you follow me A
depend on B
and B
depend on rust-nmea),
also if go to /home/evgeniy/.cargo/registry/src/github.com-1ecc6299db9ec823/nmea-0.0.6/
(see compile error) and run cargo build
then all good.
cargo tree show for A
:
│ ├── chrono v0.4.0
│ │ ├── num v0.1.40
│ │ │ ├── num-integer v0.1.35
│ │ │ │ └── num-traits v0.1.40
│ │ │ ├── num-iter v0.1.34
│ │ │ │ ├── num-integer v0.1.35 (*)
│ │ │ │ └── num-traits v0.1.40 (*)
│ │ │ └── num-traits v0.1.40 (*)
│ │ └── time v0.1.38
│ │ └── libc v0.2.27
├── nmea v0.0.6
│ ├── chrono v0.4.0 (*)
│ └── nom v3.2.0
│ └── memchr v1.0.1 (*)
and for cached by cargo
rust-nmea:
├── chrono v0.4.0
│ ├── num v0.1.40
│ │ ├── num-integer v0.1.35
│ │ │ └── num-traits v0.1.40
│ │ ├── num-iter v0.1.34
│ │ │ ├── num-integer v0.1.35 (*)
│ │ │ └── num-traits v0.1.40 (*)
│ │ └── num-traits v0.1.40 (*)
│ └── time v0.1.38
│ └── libc v0.2.27
└── nom v3.2.0
└── memchr v1.0.1
└── libc v0.2.27 (*)
so for both good and bad case used the same dependencies.
If run cargo build -v -j1
, I got rustc
command line for both cases.
The only difference for good and bad case is this part:
-L dependency=/home/evgeniy/.cargo/registry/src/github.com-1ecc6299db9ec823/nmea-0.0.6/target/debug/deps --extern chrono=/home/evgeniy/.cargo/registry/src/github.com-1ecc6299db9ec823/nmea-0.0.6/target/debug/deps/libchrono-8e9e54e691d9b988.rlib --extern nom=/home/evgeniy/.cargo/registry/src/github.com-1ecc6299db9ec823/nmea-0.0.6/target/debug/deps/libnom-b72336f662b090c1.rlib
bad case have different path to libraries and libnom-e2ec53418967eac0.rlib
instead of libnom-b72336f662b090c1.rlib
, while libchrono-8e9e54e691d9b988.rlib
match.
The crates A
and B
are close sourced and I can not reduce problem to more simple case. nom crates not used in A
and B
except via rust-nmea.
rust-nmea is used in simple way, just nmea = 0.0.6
in Cargo.toml
.
No flags or so on things.
Any idea why crate dependecy with the same flags (no flags at all) may produce or not produce syntax error?