[INFO] fetching crate snowcloud 0.4.0...
[INFO] testing snowcloud-0.4.0 against 1.75.0 for beta-1.76-1
[INFO] extracting crate snowcloud 0.4.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate snowcloud 0.4.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate snowcloud 0.4.0
[INFO] finished tweaking crates.io crate snowcloud 0.4.0
[INFO] tweaked toml for crates.io crate snowcloud 0.4.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2cde9b9682108d14f2188486a0e1a707097892205e47b4a03ad3d1a8c61f308
[INFO] running `Command { std: "docker" "start" "-a" "d2cde9b9682108d14f2188486a0e1a707097892205e47b4a03ad3d1a8c61f308", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2cde9b9682108d14f2188486a0e1a707097892205e47b4a03ad3d1a8c61f308", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2cde9b9682108d14f2188486a0e1a707097892205e47b4a03ad3d1a8c61f308", kill_on_drop: false }`
[INFO] [stdout] d2cde9b9682108d14f2188486a0e1a707097892205e47b4a03ad3d1a8c61f308
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ee396a39af452f9898dff199061879072520e5ebb2e37995ab51275245d5538
[INFO] running `Command { std: "docker" "start" "-a" "1ee396a39af452f9898dff199061879072520e5ebb2e37995ab51275245d5538", kill_on_drop: false }`
[INFO] [stderr]    Compiling snowcloud v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "1ee396a39af452f9898dff199061879072520e5ebb2e37995ab51275245d5538", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ee396a39af452f9898dff199061879072520e5ebb2e37995ab51275245d5538", kill_on_drop: false }`
[INFO] [stdout] 1ee396a39af452f9898dff199061879072520e5ebb2e37995ab51275245d5538
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f22bdfb2e2886c8c973c6d0d87aa471e0838004f335d0b183f6c9320bcdb4f48
[INFO] running `Command { std: "docker" "start" "-a" "f22bdfb2e2886c8c973c6d0d87aa471e0838004f335d0b183f6c9320bcdb4f48", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling plotters v0.3.5
[INFO] [stderr]    Compiling criterion v0.4.0
[INFO] [stderr]    Compiling snowcloud v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 8.15s
[INFO] running `Command { std: "docker" "inspect" "f22bdfb2e2886c8c973c6d0d87aa471e0838004f335d0b183f6c9320bcdb4f48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f22bdfb2e2886c8c973c6d0d87aa471e0838004f335d0b183f6c9320bcdb4f48", kill_on_drop: false }`
[INFO] [stdout] f22bdfb2e2886c8c973c6d0d87aa471e0838004f335d0b183f6c9320bcdb4f48
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 46c152de8c436063a542f709cdb82a55c4b4eb051996197cbe08c77e78208897
[INFO] running `Command { std: "docker" "start" "-a" "46c152de8c436063a542f709cdb82a55c4b4eb051996197cbe08c77e78208897", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/snowcloud-15a22a5e146ee006)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test flake::i64::single::test::properly_calculated_consts ... ok
[INFO] [stdout] test flake::i64::dual::test::to_int_and_back ... ok
[INFO] [stdout] test flake::i64::single::test::to_int_and_back ... ok
[INFO] [stdout] test flake::u64::dual::test::properly_calculated_consts ... ok
[INFO] [stdout] test flake::u64::dual::test::properly_shifted_integers ... ok
[INFO] [stdout] test flake::i64::dual::test::properly_calculated_consts ... ok
[INFO] [stdout] test flake::i64::single::test::properly_shifted_integers ... ok
[INFO] [stdout] test flake::u64::single::test::properly_shifted_integers ... ok
[INFO] [stdout] test flake::u64::single::test::properly_calculated_consts ... ok
[INFO] [stdout] test flake::i64::dual::test::properly_shifted_integers ... ok
[INFO] [stdout] test flake::u64::dual::test::to_int_and_back ... ok
[INFO] [stdout] test flake::u64::single::test::to_int_and_back ... ok
[INFO] [stdout] test cloud::sync::test::unique_ids ... ok
[INFO] [stdout] test cloud::test::unique_ids ... ok
[INFO] [stdout] test cloud::sync::test::unique_ids_threaded ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.13s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests snowcloud
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test src/cloud/mod.rs - cloud::Generator (line 23) ... ok
[INFO] [stdout] test src/flake/i64/single.rs - flake::i64::single::SingleIdFlake (line 82) ... ok
[INFO] [stdout] test src/error.rs - error::Error (line 14) ... ok
[INFO] [stdout] test src/flake/i64/dual.rs - flake::i64::dual::DualIdFlake (line 67) ... FAILED
[INFO] [stdout] test src/flake/i64/single.rs - flake::i64::single::SingleIdFlake (line 59) ... FAILED
[INFO] [stdout] test src/flake/u64/dual.rs - flake::u64::dual::DualIdFlake (line 67) ... FAILED
[INFO] [stdout] test src/cloud/sync.rs - cloud::sync::MutexGenerator (line 24) ... ok
[INFO] [stdout] test src/flake/i64/dual.rs - flake::i64::dual::DualIdFlake (line 90) ... ok
[INFO] [stdout] test src/flake/u64/single.rs - flake::u64::single::SingleIdFlake (line 58) ... FAILED
[INFO] [stdout] test src/flake/u64/single.rs - flake::u64::single::SingleIdFlake (line 81) ... ok
[INFO] [stdout] test src/flake/u64/dual.rs - flake::u64::dual::DualIdFlake (line 90) ... ok
[INFO] [stdout] test src/lib.rs - (line 91) ... ok
[INFO] [stdout] test src/wait.rs - wait::blocking_next_id (line 38) ... ok
[INFO] [stdout] test src/lib.rs - (line 11) ... ok
[INFO] [stdout] test src/wait.rs - wait::blocking_next_id_mut (line 90) ... ok
[INFO] [stdout] test src/lib.rs - (line 30) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/flake/i64/dual.rs - flake::i64::dual::DualIdFlake (line 67) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `serde`
[INFO] [stdout]  --> src/flake/i64/dual.rs:69:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde::{Serialize, Deserialize};
[INFO] [stdout]   |     ^^^^^ use of undeclared crate or module `serde`
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `Serialize`
[INFO] [stdout]  --> src/flake/i64/dual.rs:73:10
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Serialize, Deserialize)]
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `Deserialize`
[INFO] [stdout]  --> src/flake/i64/dual.rs:73:21
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Serialize, Deserialize)]
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `MyStruct: serde::ser::Serialize` is not satisfied
[INFO] [stdout]     --> src/flake/i64/dual.rs:82:41
[INFO] [stdout]      |
[INFO] [stdout] 18   | let json_string = serde_json::to_string(&my_struct).unwrap();
[INFO] [stdout]      |                   --------------------- ^^^^^^^^^^ the trait `serde::ser::Serialize` is not implemented for `MyStruct`
[INFO] [stdout]      |                   |
[INFO] [stdout]      |                   required by a bound introduced by this call
[INFO] [stdout]      |
[INFO] [stdout]      = help: the following other types implement trait `serde::ser::Serialize`:
[INFO] [stdout]                bool
[INFO] [stdout]                char
[INFO] [stdout]                isize
[INFO] [stdout]                i8
[INFO] [stdout]                i16
[INFO] [stdout]                i32
[INFO] [stdout]                i64
[INFO] [stdout]                i128
[INFO] [stdout]              and 148 others
[INFO] [stdout] note: required by a bound in `serde_json::to_string`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/serde_json-1.0.111/src/ser.rs:2209:17
[INFO] [stdout]      |
[INFO] [stdout] 2207 | pub fn to_string<T>(value: &T) -> Result<String>
[INFO] [stdout]      |        --------- required by a bound in this function
[INFO] [stdout] 2208 | where
[INFO] [stdout] 2209 |     T: ?Sized + Serialize,
[INFO] [stdout]      |                 ^^^^^^^^^ required by this bound in `to_string`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/flake/i64/single.rs - flake::i64::single::SingleIdFlake (line 59) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `serde`
[INFO] [stdout]  --> src/flake/i64/single.rs:61:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde::{Serialize, Deserialize};
[INFO] [stdout]   |     ^^^^^ use of undeclared crate or module `serde`
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `Serialize`
[INFO] [stdout]  --> src/flake/i64/single.rs:65:10
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Serialize, Deserialize)]
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `Deserialize`
[INFO] [stdout]  --> src/flake/i64/single.rs:65:21
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Serialize, Deserialize)]
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `MyStruct: serde::ser::Serialize` is not satisfied
[INFO] [stdout]     --> src/flake/i64/single.rs:74:41
[INFO] [stdout]      |
[INFO] [stdout] 18   | let json_string = serde_json::to_string(&my_struct).unwrap();
[INFO] [stdout]      |                   --------------------- ^^^^^^^^^^ the trait `serde::ser::Serialize` is not implemented for `MyStruct`
[INFO] [stdout]      |                   |
[INFO] [stdout]      |                   required by a bound introduced by this call
[INFO] [stdout]      |
[INFO] [stdout]      = help: the following other types implement trait `serde::ser::Serialize`:
[INFO] [stdout]                bool
[INFO] [stdout]                char
[INFO] [stdout]                isize
[INFO] [stdout]                i8
[INFO] [stdout]                i16
[INFO] [stdout]                i32
[INFO] [stdout]                i64
[INFO] [stdout]                i128
[INFO] [stdout]              and 148 others
[INFO] [stdout] note: required by a bound in `serde_json::to_string`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/serde_json-1.0.111/src/ser.rs:2209:17
[INFO] [stdout]      |
[INFO] [stdout] 2207 | pub fn to_string<T>(value: &T) -> Result<String>
[INFO] [stdout]      |        --------- required by a bound in this function
[INFO] [stdout] 2208 | where
[INFO] [stdout] 2209 |     T: ?Sized + Serialize,
[INFO] [stdout]      |                 ^^^^^^^^^ required by this bound in `to_string`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/flake/u64/dual.rs - flake::u64::dual::DualIdFlake (line 67) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `serde`
[INFO] [stdout]  --> src/flake/u64/dual.rs:69:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde::{Serialize, Deserialize};
[INFO] [stdout]   |     ^^^^^ use of undeclared crate or module `serde`
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `Serialize`
[INFO] [stdout]  --> src/flake/u64/dual.rs:73:10
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Serialize, Deserialize)]
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `Deserialize`
[INFO] [stdout]  --> src/flake/u64/dual.rs:73:21
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Serialize, Deserialize)]
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `MyStruct: serde::ser::Serialize` is not satisfied
[INFO] [stdout]     --> src/flake/u64/dual.rs:82:41
[INFO] [stdout]      |
[INFO] [stdout] 18   | let json_string = serde_json::to_string(&my_struct).unwrap();
[INFO] [stdout]      |                   --------------------- ^^^^^^^^^^ the trait `serde::ser::Serialize` is not implemented for `MyStruct`
[INFO] [stdout]      |                   |
[INFO] [stdout]      |                   required by a bound introduced by this call
[INFO] [stdout]      |
[INFO] [stdout]      = help: the following other types implement trait `serde::ser::Serialize`:
[INFO] [stdout]                bool
[INFO] [stdout]                char
[INFO] [stdout]                isize
[INFO] [stdout]                i8
[INFO] [stdout]                i16
[INFO] [stdout]                i32
[INFO] [stdout]                i64
[INFO] [stdout]                i128
[INFO] [stdout]              and 148 others
[INFO] [stdout] note: required by a bound in `serde_json::to_string`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/serde_json-1.0.111/src/ser.rs:2209:17
[INFO] [stdout]      |
[INFO] [stdout] 2207 | pub fn to_string<T>(value: &T) -> Result<String>
[INFO] [stdout]      |        --------- required by a bound in this function
[INFO] [stdout] 2208 | where
[INFO] [stdout] 2209 |     T: ?Sized + Serialize,
[INFO] [stdout]      |                 ^^^^^^^^^ required by this bound in `to_string`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/flake/u64/single.rs - flake::u64::single::SingleIdFlake (line 58) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `serde`
[INFO] [stdout]  --> src/flake/u64/single.rs:60:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde::{Serialize, Deserialize};
[INFO] [stdout]   |     ^^^^^ use of undeclared crate or module `serde`
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `Serialize`
[INFO] [stdout]  --> src/flake/u64/single.rs:64:10
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Serialize, Deserialize)]
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `Deserialize`
[INFO] [stdout]  --> src/flake/u64/single.rs:64:21
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Serialize, Deserialize)]
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `MyStruct: serde::ser::Serialize` is not satisfied
[INFO] [stdout]     --> src/flake/u64/single.rs:73:41
[INFO] [stdout]      |
[INFO] [stdout] 18   | let json_string = serde_json::to_string(&my_struct).unwrap();
[INFO] [stdout]      |                   --------------------- ^^^^^^^^^^ the trait `serde::ser::Serialize` is not implemented for `MyStruct`
[INFO] [stdout]      |                   |
[INFO] [stdout]      |                   required by a bound introduced by this call
[INFO] [stdout]      |
[INFO] [stdout]      = help: the following other types implement trait `serde::ser::Serialize`:
[INFO] [stdout]                bool
[INFO] [stdout]                char
[INFO] [stdout]                isize
[INFO] [stdout]                i8
[INFO] [stdout]                i16
[INFO] [stdout]                i32
[INFO] [stdout]                i64
[INFO] [stdout]                i128
[INFO] [stdout]              and 148 others
[INFO] [stdout] note: required by a bound in `serde_json::to_string`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/serde_json-1.0.111/src/ser.rs:2209:17
[INFO] [stdout]      |
[INFO] [stdout] 2207 | pub fn to_string<T>(value: &T) -> Result<String>
[INFO] [stdout]      |        --------- required by a bound in this function
[INFO] [stdout] 2208 | where
[INFO] [stdout] 2209 |     T: ?Sized + Serialize,
[INFO] [stdout]      |                 ^^^^^^^^^ required by this bound in `to_string`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/flake/i64/dual.rs - flake::i64::dual::DualIdFlake (line 67)
[INFO] [stdout]     src/flake/i64/single.rs - flake::i64::single::SingleIdFlake (line 59)
[INFO] [stdout]     src/flake/u64/dual.rs - flake::u64::dual::DualIdFlake (line 67)
[INFO] [stdout]     src/flake/u64/single.rs - flake::u64::single::SingleIdFlake (line 58)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 12 passed; 4 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.38s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "46c152de8c436063a542f709cdb82a55c4b4eb051996197cbe08c77e78208897", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46c152de8c436063a542f709cdb82a55c4b4eb051996197cbe08c77e78208897", kill_on_drop: false }`
[INFO] [stdout] 46c152de8c436063a542f709cdb82a55c4b4eb051996197cbe08c77e78208897
