[INFO] updating cached repository darkwater/um
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/darkwater/um
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/darkwater/um" "work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/darkwater/um"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/darkwater/um'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/darkwater/um" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/darkwater/um"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/darkwater/um'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 290006bff8a85d175e37e16f89eb0fa19b9114ad
[INFO] sha for GitHub repo darkwater/um: 290006bff8a85d175e37e16f89eb0fa19b9114ad
[INFO] validating manifest of darkwater/um on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of darkwater/um on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing darkwater/um
[INFO] finished frobbing darkwater/um
[INFO] frobbed toml for darkwater/um written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/darkwater/um/Cargo.toml
[INFO] started frobbing darkwater/um
[INFO] finished frobbing darkwater/um
[INFO] frobbed toml for darkwater/um written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/darkwater/um/Cargo.toml
[INFO] crate darkwater/um already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking darkwater/um against try#f45cc3094ee337acd688771b9234318046b0572d for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-0/try#f45cc3094ee337acd688771b9234318046b0572d:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/darkwater/um:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7d6979daa9c1e58c82ad162338b7e8bfacf7de886ea13f903c221f9f1ebfea73
[INFO] running `"docker" "start" "-a" "7d6979daa9c1e58c82ad162338b7e8bfacf7de886ea13f903c221f9f1ebfea73"`
[INFO] [stderr]     Checking um v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `TcpListener`
[INFO] [stderr]  --> src/client.rs:7:18
[INFO] [stderr]   |
[INFO] [stderr] 7 | use tokio::net::{TcpListener, TcpStream};
[INFO] [stderr]   |                  ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BufMut`
[INFO] [stderr]  --> src/commandcodec.rs:1:13
[INFO] [stderr]   |
[INFO] [stderr] 1 | use bytes::{BufMut, BytesMut};
[INFO] [stderr]   |             ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Write`
[INFO] [stderr]  --> src/commandcodec.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::fmt::Write;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::io`
[INFO] [stderr]  --> src/server.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use tokio::io;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: ambiguous associated item
[INFO] [stderr]   --> src/response.rs:54:46
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn into_result(self) -> Result<Self::Ok, Self::Error> {
[INFO] [stderr]    |                                              ^^^^^^^^^^^ help: use fully-qualified syntax: `<response::Response<'a> as Trait>::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(ambiguous_associated_items)] on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #57644 <https://github.com/rust-lang/rust/issues/57644>
[INFO] [stderr] note: `Error` could refer to variant defined here
[INFO] [stderr]   --> src/response.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Error(&'static str),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] note: `Error` could also refer to associated type defined here
[INFO] [stderr] 
[INFO] [stderr] error: ambiguous associated item
[INFO] [stderr]   --> src/response.rs:61:22
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn from_error(v: Self::Error) -> Self {
[INFO] [stderr]    |                      ^^^^^^^^^^^ help: use fully-qualified syntax: `<response::Response<'a> as Trait>::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #57644 <https://github.com/rust-lang/rust/issues/57644>
[INFO] [stderr] note: `Error` could refer to variant defined here
[INFO] [stderr]   --> src/response.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Error(&'static str),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] note: `Error` could also refer to associated type defined here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `um`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused import: `TcpListener`
[INFO] [stderr]  --> src/client.rs:7:18
[INFO] [stderr]   |
[INFO] [stderr] 7 | use tokio::net::{TcpListener, TcpStream};
[INFO] [stderr]   |                  ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BufMut`
[INFO] [stderr]  --> src/commandcodec.rs:1:13
[INFO] [stderr]   |
[INFO] [stderr] 1 | use bytes::{BufMut, BytesMut};
[INFO] [stderr]   |             ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Write`
[INFO] [stderr]  --> src/commandcodec.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::fmt::Write;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/node.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::io`
[INFO] [stderr]  --> src/server.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use tokio::io;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/server.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `::std::io::prelude::*`
[INFO] [stderr]   --> src/server.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     use ::std::io::prelude::*;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `::std::net::TcpStream`
[INFO] [stderr]   --> src/server.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |     use ::std::net::TcpStream;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/value.rs:83:9
[INFO] [stderr]    |
[INFO] [stderr] 83 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: ambiguous associated item
[INFO] [stderr]   --> src/response.rs:54:46
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn into_result(self) -> Result<Self::Ok, Self::Error> {
[INFO] [stderr]    |                                              ^^^^^^^^^^^ help: use fully-qualified syntax: `<response::Response<'a> as Trait>::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(ambiguous_associated_items)] on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #57644 <https://github.com/rust-lang/rust/issues/57644>
[INFO] [stderr] note: `Error` could refer to variant defined here
[INFO] [stderr]   --> src/response.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Error(&'static str),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] note: `Error` could also refer to associated type defined here
[INFO] [stderr] 
[INFO] [stderr] error: ambiguous associated item
[INFO] [stderr]   --> src/response.rs:61:22
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn from_error(v: Self::Error) -> Self {
[INFO] [stderr]    |                      ^^^^^^^^^^^ help: use fully-qualified syntax: `<response::Response<'a> as Trait>::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #57644 <https://github.com/rust-lang/rust/issues/57644>
[INFO] [stderr] note: `Error` could refer to variant defined here
[INFO] [stderr]   --> src/response.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Error(&'static str),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] note: `Error` could also refer to associated type defined here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `um`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7d6979daa9c1e58c82ad162338b7e8bfacf7de886ea13f903c221f9f1ebfea73"`
[INFO] running `"docker" "rm" "-f" "7d6979daa9c1e58c82ad162338b7e8bfacf7de886ea13f903c221f9f1ebfea73"`
[INFO] [stdout] 7d6979daa9c1e58c82ad162338b7e8bfacf7de886ea13f903c221f9f1ebfea73