[INFO] fetching crate snowcloud 0.4.0...
[INFO] testing snowcloud-0.4.0 against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] extracting crate snowcloud 0.4.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate snowcloud 0.4.0 on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "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-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 76 packages to latest compatible versions
[INFO] [stderr]       Adding anes v0.1.6 (latest: v0.2.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v3.2.25 (latest: v4.5.4)
[INFO] [stderr]       Adding clap_lex v0.2.4 (latest: v0.7.0)
[INFO] [stderr]       Adding criterion v0.4.0 (latest: v0.5.1)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.5)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.13.0)
[INFO] [stderr]       Adding os_str_bytes v6.6.1 (latest: v7.0.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c2366988cf91c39b57383c9a2c51620b0abba116c936ab957dc44b6517579906
[INFO] running `Command { std: "docker" "start" "-a" "c2366988cf91c39b57383c9a2c51620b0abba116c936ab957dc44b6517579906", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2366988cf91c39b57383c9a2c51620b0abba116c936ab957dc44b6517579906", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2366988cf91c39b57383c9a2c51620b0abba116c936ab957dc44b6517579906", kill_on_drop: false }`
[INFO] [stdout] c2366988cf91c39b57383c9a2c51620b0abba116c936ab957dc44b6517579906
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8ddc30f2160217127f1e6e9975ca3f08dd76ad52e1000e6cb8b14ddaa331d35
[INFO] running `Command { std: "docker" "start" "-a" "d8ddc30f2160217127f1e6e9975ca3f08dd76ad52e1000e6cb8b14ddaa331d35", kill_on_drop: false }`
[INFO] [stderr]    Compiling snowcloud v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "d8ddc30f2160217127f1e6e9975ca3f08dd76ad52e1000e6cb8b14ddaa331d35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8ddc30f2160217127f1e6e9975ca3f08dd76ad52e1000e6cb8b14ddaa331d35", kill_on_drop: false }`
[INFO] [stdout] d8ddc30f2160217127f1e6e9975ca3f08dd76ad52e1000e6cb8b14ddaa331d35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab31ca9d5d603853f14cf9d55dcbc8e9faadddf32cc72d0ecdaa4efdea31b6c2
[INFO] running `Command { std: "docker" "start" "-a" "ab31ca9d5d603853f14cf9d55dcbc8e9faadddf32cc72d0ecdaa4efdea31b6c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.83
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling serde v1.0.202
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling serde_json v1.0.117
[INFO] [stderr]    Compiling either v1.12.0
[INFO] [stderr]    Compiling os_str_bytes v6.6.1
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling ciborium-io v0.2.2
[INFO] [stderr]    Compiling plotters-backend v0.3.6
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling regex-syntax v0.8.3
[INFO] [stderr]    Compiling half v2.4.1
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stderr]    Compiling textwrap v0.16.1
[INFO] [stderr]    Compiling cast v0.3.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling plotters-svg v0.3.6
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling ciborium-ll v0.2.2
[INFO] [stderr]    Compiling walkdir v2.5.0
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling anes v0.1.6
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling syn v2.0.66
[INFO] [stderr]    Compiling crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling clap v3.2.25
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]    Compiling plotters v0.3.6
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling criterion-plot v0.5.0
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling serde_derive v1.0.202
[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 14.61s
[INFO] running `Command { std: "docker" "inspect" "ab31ca9d5d603853f14cf9d55dcbc8e9faadddf32cc72d0ecdaa4efdea31b6c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab31ca9d5d603853f14cf9d55dcbc8e9faadddf32cc72d0ecdaa4efdea31b6c2", kill_on_drop: false }`
[INFO] [stdout] ab31ca9d5d603853f14cf9d55dcbc8e9faadddf32cc72d0ecdaa4efdea31b6c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fc868a8cd2d678093b2b69a6ebd4e9b6840fc074439a6518520638e1602b8ff4
[INFO] running `Command { std: "docker" "start" "-a" "fc868a8cd2d678093b2b69a6ebd4e9b6840fc074439a6518520638e1602b8ff4", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/snowcloud-01a5a0bb4325f66d)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test flake::i64::dual::test::properly_shifted_integers ... ok
[INFO] [stdout] test flake::i64::dual::test::to_int_and_back ... ok
[INFO] [stdout] test flake::i64::single::test::properly_shifted_integers ... ok
[INFO] [stdout] test flake::i64::dual::test::properly_calculated_consts ... ok
[INFO] [stdout] test flake::i64::single::test::properly_calculated_consts ... 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::u64::dual::test::to_int_and_back ... ok
[INFO] [stdout] test flake::u64::single::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 cloud::test::unique_ids ... ok
[INFO] [stdout] test cloud::sync::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 0.05s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests snowcloud
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test src/flake/i64/single.rs - flake::i64::single::SingleIdFlake (line 59) ... FAILED
[INFO] [stdout] test src/flake/u64/single.rs - flake::u64::single::SingleIdFlake (line 58) ... FAILED
[INFO] [stdout] test src/flake/u64/dual.rs - flake::u64::dual::DualIdFlake (line 67) ... FAILED
[INFO] [stdout] test src/flake/i64/dual.rs - flake::i64::dual::DualIdFlake (line 67) ... FAILED
[INFO] [stdout] test src/cloud/sync.rs - cloud::sync::MutexGenerator (line 24) ... ok
[INFO] [stdout] test src/flake/i64/single.rs - flake::i64::single::SingleIdFlake (line 82) ... ok
[INFO] [stdout] test src/lib.rs - (line 91) ... ok
[INFO] [stdout] test src/lib.rs - (line 30) ... ok
[INFO] [stdout] test src/flake/u64/single.rs - flake::u64::single::SingleIdFlake (line 81) ... ok
[INFO] [stdout] test src/error.rs - error::Error (line 14) ... ok
[INFO] [stdout] test src/cloud/mod.rs - cloud::Generator (line 23) ... ok
[INFO] [stdout] test src/flake/u64/dual.rs - flake::u64::dual::DualIdFlake (line 90) ... ok
[INFO] [stdout] test src/lib.rs - (line 11) ... ok
[INFO] [stdout] test src/flake/i64/dual.rs - flake::i64::dual::DualIdFlake (line 90) ... 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] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[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[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]                &'a T
[INFO] [stdout]                &'a mut T
[INFO] [stdout]                ()
[INFO] [stdout]                (T0, T1)
[INFO] [stdout]                (T0, T1, T2)
[INFO] [stdout]                (T0, T1, T2, T3)
[INFO] [stdout]                (T0, T1, T2, T3, T4)
[INFO] [stdout]                (T0, T1, T2, T3, T4, T5)
[INFO] [stdout]              and 149 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-1.0.117/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 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 undeclared crate or module `serde`
[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]                &'a T
[INFO] [stdout]                &'a mut T
[INFO] [stdout]                ()
[INFO] [stdout]                (T0, T1)
[INFO] [stdout]                (T0, T1, T2)
[INFO] [stdout]                (T0, T1, T2, T3)
[INFO] [stdout]                (T0, T1, T2, T3, T4)
[INFO] [stdout]                (T0, T1, T2, T3, T4, T5)
[INFO] [stdout]              and 149 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-1.0.117/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 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 undeclared crate or module `serde`
[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]                &'a T
[INFO] [stdout]                &'a mut T
[INFO] [stdout]                ()
[INFO] [stdout]                (T0, T1)
[INFO] [stdout]                (T0, T1, T2)
[INFO] [stdout]                (T0, T1, T2, T3)
[INFO] [stdout]                (T0, T1, T2, T3, T4)
[INFO] [stdout]                (T0, T1, T2, T3, T4, T5)
[INFO] [stdout]              and 149 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-1.0.117/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 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/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[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]                &'a T
[INFO] [stdout]                &'a mut T
[INFO] [stdout]                ()
[INFO] [stdout]                (T0, T1)
[INFO] [stdout]                (T0, T1, T2)
[INFO] [stdout]                (T0, T1, T2, T3)
[INFO] [stdout]                (T0, T1, T2, T3, T4)
[INFO] [stdout]                (T0, T1, T2, T3, T4, T5)
[INFO] [stdout]              and 149 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-1.0.117/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 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 0.25s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "fc868a8cd2d678093b2b69a6ebd4e9b6840fc074439a6518520638e1602b8ff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc868a8cd2d678093b2b69a6ebd4e9b6840fc074439a6518520638e1602b8ff4", kill_on_drop: false }`
[INFO] [stdout] fc868a8cd2d678093b2b69a6ebd4e9b6840fc074439a6518520638e1602b8ff4
