[INFO] fetching crate snowcloud 0.4.0...
[INFO] testing snowcloud-0.4.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate snowcloud 0.4.0 into /workspace/builds/worker-6-tc2/source
[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-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate snowcloud 0.4.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 69 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.4.0 (available: v0.7.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b2b44e96ecc5a8dd33cca3137996c46ef86c713f8ae0e81cdca5d86103d6186
[INFO] running `Command { std: "docker" "start" "-a" "6b2b44e96ecc5a8dd33cca3137996c46ef86c713f8ae0e81cdca5d86103d6186", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b2b44e96ecc5a8dd33cca3137996c46ef86c713f8ae0e81cdca5d86103d6186", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b2b44e96ecc5a8dd33cca3137996c46ef86c713f8ae0e81cdca5d86103d6186", kill_on_drop: false }`
[INFO] [stdout] 6b2b44e96ecc5a8dd33cca3137996c46ef86c713f8ae0e81cdca5d86103d6186
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2fc7ddab0b3fd81999fb439965c3ca6f309958af1d81992f045670fb3bbf8dd
[INFO] running `Command { std: "docker" "start" "-a" "d2fc7ddab0b3fd81999fb439965c3ca6f309958af1d81992f045670fb3bbf8dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling snowcloud v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "d2fc7ddab0b3fd81999fb439965c3ca6f309958af1d81992f045670fb3bbf8dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2fc7ddab0b3fd81999fb439965c3ca6f309958af1d81992f045670fb3bbf8dd", kill_on_drop: false }`
[INFO] [stdout] d2fc7ddab0b3fd81999fb439965c3ca6f309958af1d81992f045670fb3bbf8dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18f153582fd7eb0709e990043cebb48b8db5c12a180c401595239139017c4c71
[INFO] running `Command { std: "docker" "start" "-a" "18f153582fd7eb0709e990043cebb48b8db5c12a180c401595239139017c4c71", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]    Compiling half v2.6.0
[INFO] [stderr]    Compiling regex-syntax v0.8.6
[INFO] [stderr]    Compiling os_str_bytes v6.6.1
[INFO] [stderr]    Compiling textwrap v0.16.2
[INFO] [stderr]    Compiling criterion-plot v0.5.0
[INFO] [stderr]    Compiling ciborium-ll v0.2.2
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling plotters v0.3.7
[INFO] [stderr]    Compiling oorandom v11.1.5
[INFO] [stderr]    Compiling clap v3.2.25
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling regex-automata v0.4.11
[INFO] [stderr]    Compiling regex v1.11.3
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling ciborium v0.2.2
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.4.0
[INFO] [stderr]    Compiling snowcloud v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 34.73s
[INFO] running `Command { std: "docker" "inspect" "18f153582fd7eb0709e990043cebb48b8db5c12a180c401595239139017c4c71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18f153582fd7eb0709e990043cebb48b8db5c12a180c401595239139017c4c71", kill_on_drop: false }`
[INFO] [stdout] 18f153582fd7eb0709e990043cebb48b8db5c12a180c401595239139017c4c71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 963d7fc59d16e7852ec72f6352265ee5df2cbe7eb0fbf919f0638d36132ecc7b
[INFO] running `Command { std: "docker" "start" "-a" "963d7fc59d16e7852ec72f6352265ee5df2cbe7eb0fbf919f0638d36132ecc7b", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/snowcloud-330990941334531b)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test flake::i64::dual::test::properly_calculated_consts ... ok
[INFO] [stdout] test flake::i64::dual::test::to_int_and_back ... ok
[INFO] [stdout] test flake::i64::single::test::properly_calculated_consts ... ok
[INFO] [stdout] test flake::i64::single::test::properly_shifted_integers ... ok
[INFO] [stdout] test flake::i64::single::test::to_int_and_back ... ok
[INFO] [stdout] test flake::u64::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::properly_calculated_consts ... ok
[INFO] [stdout] test flake::u64::dual::test::properly_calculated_consts ... ok
[INFO] [stdout] test flake::u64::single::test::properly_shifted_integers ... ok
[INFO] [stdout] test flake::u64::single::test::to_int_and_back ... ok
[INFO] [stdout] test flake::i64::dual::test::properly_shifted_integers ... 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 0.08s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests snowcloud
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test src/flake/i64/dual.rs - flake::i64::dual::DualIdFlake (line 67) ... FAILED
[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/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/error.rs - error::Error (line 14) ... ok
[INFO] [stdout] test src/flake/u64/dual.rs - flake::u64::dual::DualIdFlake (line 90) ... ok
[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/lib.rs - (line 91) ... ok
[INFO] [stdout] test src/flake/u64/single.rs - flake::u64::single::SingleIdFlake (line 81) ... ok
[INFO] [stdout] test src/wait.rs - wait::blocking_next_id_mut (line 90) ... 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/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 unresolved module or unlinked crate `serde`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `serde`, use `cargo add serde` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `MyStruct: serde::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]      |                   --------------------- ^^^^^^^^^^ unsatisfied trait bound
[INFO] [stdout]      |                   |
[INFO] [stdout]      |                   required by a bound introduced by this call
[INFO] [stdout]      |
[INFO] [stdout] help: the trait `serde::Serialize` is not implemented for `MyStruct`
[INFO] [stdout]     --> src/flake/i64/dual.rs:74:1
[INFO] [stdout]      |
[INFO] [stdout]   10 | pub struct MyStruct {
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      = note: for local types consider adding `#[derive(serde::Serialize)]` to your `MyStruct` type
[INFO] [stdout]      = note: for types from other crates check whether the crate offers a `serde` feature flag
[INFO] [stdout]      = help: the following other types implement trait `serde::Serialize`:
[INFO] [stdout]                &'a T
[INFO] [stdout]                &'a mut T
[INFO] [stdout]                ()
[INFO] [stdout]                (T,)
[INFO] [stdout]                (T0, T1)
[INFO] [stdout]                (T0, T1, T2)
[INFO] [stdout]                (T0, T1, T2, T3)
[INFO] [stdout]                (T0, T1, T2, T3, T4)
[INFO] [stdout]              and 147 others
[INFO] [stdout] note: required by a bound in `serde_json::to_string`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/serde_json-1.0.145/src/ser.rs:2247:17
[INFO] [stdout]      |
[INFO] [stdout] 2245 | pub fn to_string<T>(value: &T) -> Result<String>
[INFO] [stdout]      |        --------- required by a bound in this function
[INFO] [stdout] 2246 | where
[INFO] [stdout] 2247 |     T: ?Sized + Serialize,
[INFO] [stdout]      |                 ^^^^^^^^^ required by this bound in `to_string`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 unresolved module or unlinked crate `serde`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `serde`, use `cargo add serde` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `MyStruct: serde::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]      |                   --------------------- ^^^^^^^^^^ unsatisfied trait bound
[INFO] [stdout]      |                   |
[INFO] [stdout]      |                   required by a bound introduced by this call
[INFO] [stdout]      |
[INFO] [stdout] help: the trait `serde::Serialize` is not implemented for `MyStruct`
[INFO] [stdout]     --> src/flake/i64/single.rs:66:1
[INFO] [stdout]      |
[INFO] [stdout]   10 | pub struct MyStruct {
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      = note: for local types consider adding `#[derive(serde::Serialize)]` to your `MyStruct` type
[INFO] [stdout]      = note: for types from other crates check whether the crate offers a `serde` feature flag
[INFO] [stdout]      = help: the following other types implement trait `serde::Serialize`:
[INFO] [stdout]                &'a T
[INFO] [stdout]                &'a mut T
[INFO] [stdout]                ()
[INFO] [stdout]                (T,)
[INFO] [stdout]                (T0, T1)
[INFO] [stdout]                (T0, T1, T2)
[INFO] [stdout]                (T0, T1, T2, T3)
[INFO] [stdout]                (T0, T1, T2, T3, T4)
[INFO] [stdout]              and 147 others
[INFO] [stdout] note: required by a bound in `serde_json::to_string`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/serde_json-1.0.145/src/ser.rs:2247:17
[INFO] [stdout]      |
[INFO] [stdout] 2245 | pub fn to_string<T>(value: &T) -> Result<String>
[INFO] [stdout]      |        --------- required by a bound in this function
[INFO] [stdout] 2246 | where
[INFO] [stdout] 2247 |     T: ?Sized + Serialize,
[INFO] [stdout]      |                 ^^^^^^^^^ required by this bound in `to_string`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 unresolved module or unlinked crate `serde`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `serde`, use `cargo add serde` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `MyStruct: serde::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]      |                   --------------------- ^^^^^^^^^^ unsatisfied trait bound
[INFO] [stdout]      |                   |
[INFO] [stdout]      |                   required by a bound introduced by this call
[INFO] [stdout]      |
[INFO] [stdout] help: the trait `serde::Serialize` is not implemented for `MyStruct`
[INFO] [stdout]     --> src/flake/u64/dual.rs:74:1
[INFO] [stdout]      |
[INFO] [stdout]   10 | pub struct MyStruct {
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      = note: for local types consider adding `#[derive(serde::Serialize)]` to your `MyStruct` type
[INFO] [stdout]      = note: for types from other crates check whether the crate offers a `serde` feature flag
[INFO] [stdout]      = help: the following other types implement trait `serde::Serialize`:
[INFO] [stdout]                &'a T
[INFO] [stdout]                &'a mut T
[INFO] [stdout]                ()
[INFO] [stdout]                (T,)
[INFO] [stdout]                (T0, T1)
[INFO] [stdout]                (T0, T1, T2)
[INFO] [stdout]                (T0, T1, T2, T3)
[INFO] [stdout]                (T0, T1, T2, T3, T4)
[INFO] [stdout]              and 147 others
[INFO] [stdout] note: required by a bound in `serde_json::to_string`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/serde_json-1.0.145/src/ser.rs:2247:17
[INFO] [stdout]      |
[INFO] [stdout] 2245 | pub fn to_string<T>(value: &T) -> Result<String>
[INFO] [stdout]      |        --------- required by a bound in this function
[INFO] [stdout] 2246 | where
[INFO] [stdout] 2247 |     T: ?Sized + Serialize,
[INFO] [stdout]      |                 ^^^^^^^^^ required by this bound in `to_string`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 unresolved module or unlinked crate `serde`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `serde`, use `cargo add serde` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `MyStruct: serde::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]      |                   --------------------- ^^^^^^^^^^ unsatisfied trait bound
[INFO] [stdout]      |                   |
[INFO] [stdout]      |                   required by a bound introduced by this call
[INFO] [stdout]      |
[INFO] [stdout] help: the trait `serde::Serialize` is not implemented for `MyStruct`
[INFO] [stdout]     --> src/flake/u64/single.rs:65:1
[INFO] [stdout]      |
[INFO] [stdout]   10 | pub struct MyStruct {
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      = note: for local types consider adding `#[derive(serde::Serialize)]` to your `MyStruct` type
[INFO] [stdout]      = note: for types from other crates check whether the crate offers a `serde` feature flag
[INFO] [stdout]      = help: the following other types implement trait `serde::Serialize`:
[INFO] [stdout]                &'a T
[INFO] [stdout]                &'a mut T
[INFO] [stdout]                ()
[INFO] [stdout]                (T,)
[INFO] [stdout]                (T0, T1)
[INFO] [stdout]                (T0, T1, T2)
[INFO] [stdout]                (T0, T1, T2, T3)
[INFO] [stdout]                (T0, T1, T2, T3, T4)
[INFO] [stdout]              and 147 others
[INFO] [stdout] note: required by a bound in `serde_json::to_string`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/serde_json-1.0.145/src/ser.rs:2247:17
[INFO] [stdout]      |
[INFO] [stdout] 2245 | pub fn to_string<T>(value: &T) -> Result<String>
[INFO] [stdout]      |        --------- required by a bound in this function
[INFO] [stdout] 2246 | where
[INFO] [stdout] 2247 |     T: ?Sized + Serialize,
[INFO] [stdout]      |                 ^^^^^^^^^ required by this bound in `to_string`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 1.17s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "963d7fc59d16e7852ec72f6352265ee5df2cbe7eb0fbf919f0638d36132ecc7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "963d7fc59d16e7852ec72f6352265ee5df2cbe7eb0fbf919f0638d36132ecc7b", kill_on_drop: false }`
[INFO] [stdout] 963d7fc59d16e7852ec72f6352265ee5df2cbe7eb0fbf919f0638d36132ecc7b