[INFO] fetching crate safe_attr 1.0.0...
[INFO] testing safe_attr-1.0.0 against 1.75.0 for beta-1.76-1
[INFO] extracting crate safe_attr 1.0.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate safe_attr 1.0.0 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 safe_attr 1.0.0
[INFO] finished tweaking crates.io crate safe_attr 1.0.0
[INFO] tweaked toml for crates.io crate safe_attr 1.0.0 written to /workspace/builds/worker-0-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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ca2e7f26d7a1aa6368e3b3a3fe6508e2f6f8d32708eaf02377d5464672ceb5c0
[INFO] running `Command { std: "docker" "start" "-a" "ca2e7f26d7a1aa6368e3b3a3fe6508e2f6f8d32708eaf02377d5464672ceb5c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca2e7f26d7a1aa6368e3b3a3fe6508e2f6f8d32708eaf02377d5464672ceb5c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca2e7f26d7a1aa6368e3b3a3fe6508e2f6f8d32708eaf02377d5464672ceb5c0", kill_on_drop: false }`
[INFO] [stdout] ca2e7f26d7a1aa6368e3b3a3fe6508e2f6f8d32708eaf02377d5464672ceb5c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 9005cc191454ce4f1851d043f7462184a3a0926712ed164b25e3796419fad9fa
[INFO] running `Command { std: "docker" "start" "-a" "9005cc191454ce4f1851d043f7462184a3a0926712ed164b25e3796419fad9fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling safe_attr v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "9005cc191454ce4f1851d043f7462184a3a0926712ed164b25e3796419fad9fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9005cc191454ce4f1851d043f7462184a3a0926712ed164b25e3796419fad9fa", kill_on_drop: false }`
[INFO] [stdout] 9005cc191454ce4f1851d043f7462184a3a0926712ed164b25e3796419fad9fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 17ee05ea5de3780f301b11bb50ee3782239401db5fb036c1aa4966c5af8238ce
[INFO] running `Command { std: "docker" "start" "-a" "17ee05ea5de3780f301b11bb50ee3782239401db5fb036c1aa4966c5af8238ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling safe_attr v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "17ee05ea5de3780f301b11bb50ee3782239401db5fb036c1aa4966c5af8238ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17ee05ea5de3780f301b11bb50ee3782239401db5fb036c1aa4966c5af8238ce", kill_on_drop: false }`
[INFO] [stdout] 17ee05ea5de3780f301b11bb50ee3782239401db5fb036c1aa4966c5af8238ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 573c0a1e482501a0e6463cff5f6ad649ce6783a3da2e8bcbfda76f4f6e22045c
[INFO] running `Command { std: "docker" "start" "-a" "573c0a1e482501a0e6463cff5f6ad649ce6783a3da2e8bcbfda76f4f6e22045c", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/safe_attr-6cd2e4a09c15ef71)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests safe_attr
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 22) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 5) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 22) stdout ----
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Num` in this scope
[INFO] [stdout]  --> src/lib.rs:28:19
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut num = Num { long: 132 };
[INFO] [stdout]   |                   ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0422`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 22)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.26s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "573c0a1e482501a0e6463cff5f6ad649ce6783a3da2e8bcbfda76f4f6e22045c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "573c0a1e482501a0e6463cff5f6ad649ce6783a3da2e8bcbfda76f4f6e22045c", kill_on_drop: false }`
[INFO] [stdout] 573c0a1e482501a0e6463cff5f6ad649ce6783a3da2e8bcbfda76f4f6e22045c
[INFO] testing safe_attr-1.0.0 against beta-2023-12-22 for beta-1.76-1
[INFO] extracting crate safe_attr 1.0.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate safe_attr 1.0.0 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate safe_attr 1.0.0
[INFO] finished tweaking crates.io crate safe_attr 1.0.0
[INFO] tweaked toml for crates.io crate safe_attr 1.0.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "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" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e1c32d0d8e519b73f076d31f553769a4e5c5ddbc9856a2989024372ed9787ad5
[INFO] running `Command { std: "docker" "start" "-a" "e1c32d0d8e519b73f076d31f553769a4e5c5ddbc9856a2989024372ed9787ad5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1c32d0d8e519b73f076d31f553769a4e5c5ddbc9856a2989024372ed9787ad5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1c32d0d8e519b73f076d31f553769a4e5c5ddbc9856a2989024372ed9787ad5", kill_on_drop: false }`
[INFO] [stdout] e1c32d0d8e519b73f076d31f553769a4e5c5ddbc9856a2989024372ed9787ad5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 579c44cca00c1fa0228fcd6d253445e7c35dfd79224a38c322ecc2165de5458c
[INFO] running `Command { std: "docker" "start" "-a" "579c44cca00c1fa0228fcd6d253445e7c35dfd79224a38c322ecc2165de5458c", kill_on_drop: false }`
[INFO] [stderr]    Compiling safe_attr v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "579c44cca00c1fa0228fcd6d253445e7c35dfd79224a38c322ecc2165de5458c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "579c44cca00c1fa0228fcd6d253445e7c35dfd79224a38c322ecc2165de5458c", kill_on_drop: false }`
[INFO] [stdout] 579c44cca00c1fa0228fcd6d253445e7c35dfd79224a38c322ecc2165de5458c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d84744b4cee081fa0b03d1d061d0fdc51ea88a892e52242131b4fd059ec25cc
[INFO] running `Command { std: "docker" "start" "-a" "0d84744b4cee081fa0b03d1d061d0fdc51ea88a892e52242131b4fd059ec25cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling safe_attr v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "0d84744b4cee081fa0b03d1d061d0fdc51ea88a892e52242131b4fd059ec25cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d84744b4cee081fa0b03d1d061d0fdc51ea88a892e52242131b4fd059ec25cc", kill_on_drop: false }`
[INFO] [stdout] 0d84744b4cee081fa0b03d1d061d0fdc51ea88a892e52242131b4fd059ec25cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8f9628a91a23dde1c9124fd7289f1d770aa49d58a4927b0b2968facb8ee19c9d
[INFO] running `Command { std: "docker" "start" "-a" "8f9628a91a23dde1c9124fd7289f1d770aa49d58a4927b0b2968facb8ee19c9d", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/safe_attr-0d6c696f4f9312d4)
[INFO] [stderr]    Doc-tests safe_attr
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 22) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 5) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 22) stdout ----
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Num` in this scope
[INFO] [stdout]  --> src/lib.rs:28:19
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut num = Num { long: 132 };
[INFO] [stdout]   |                   ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0422`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 22)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.20s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "8f9628a91a23dde1c9124fd7289f1d770aa49d58a4927b0b2968facb8ee19c9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f9628a91a23dde1c9124fd7289f1d770aa49d58a4927b0b2968facb8ee19c9d", kill_on_drop: false }`
[INFO] [stdout] 8f9628a91a23dde1c9124fd7289f1d770aa49d58a4927b0b2968facb8ee19c9d
