[INFO] fetching crate simple-string-builder 0.2.0...
[INFO] testing simple-string-builder-0.2.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate simple-string-builder 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate simple-string-builder 0.2.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate simple-string-builder 0.2.0
[INFO] finished tweaking crates.io crate simple-string-builder 0.2.0
[INFO] tweaked toml for crates.io crate simple-string-builder 0.2.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d6518889ff37e88a83b15385fabb0958f3965facd529c22999cb4b329fa7dbd
[INFO] running `Command { std: "docker" "start" "-a" "5d6518889ff37e88a83b15385fabb0958f3965facd529c22999cb4b329fa7dbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d6518889ff37e88a83b15385fabb0958f3965facd529c22999cb4b329fa7dbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d6518889ff37e88a83b15385fabb0958f3965facd529c22999cb4b329fa7dbd", kill_on_drop: false }`
[INFO] [stdout] 5d6518889ff37e88a83b15385fabb0958f3965facd529c22999cb4b329fa7dbd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c7ff67eab6e9a173aaa98c7d5ef39a768bd3f7d9cf43d3659deb11a6992de0f
[INFO] running `Command { std: "docker" "start" "-a" "2c7ff67eab6e9a173aaa98c7d5ef39a768bd3f7d9cf43d3659deb11a6992de0f", kill_on_drop: false }`
[INFO] [stderr]    Compiling simple-string-builder v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "2c7ff67eab6e9a173aaa98c7d5ef39a768bd3f7d9cf43d3659deb11a6992de0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c7ff67eab6e9a173aaa98c7d5ef39a768bd3f7d9cf43d3659deb11a6992de0f", kill_on_drop: false }`
[INFO] [stdout] 2c7ff67eab6e9a173aaa98c7d5ef39a768bd3f7d9cf43d3659deb11a6992de0f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c84a5ede31dc11492e384652aa76981b3d5f327d99a8d1d17c116910657ba2f2
[INFO] running `Command { std: "docker" "start" "-a" "c84a5ede31dc11492e384652aa76981b3d5f327d99a8d1d17c116910657ba2f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling simple-string-builder v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.48s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/simple_string_builder-c57fb2506bd9085e)
[INFO] running `Command { std: "docker" "inspect" "c84a5ede31dc11492e384652aa76981b3d5f327d99a8d1d17c116910657ba2f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c84a5ede31dc11492e384652aa76981b3d5f327d99a8d1d17c116910657ba2f2", kill_on_drop: false }`
[INFO] [stdout] c84a5ede31dc11492e384652aa76981b3d5f327d99a8d1d17c116910657ba2f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d6cf4dc3feefc4c3d9eb0797a8d46393313fc0185fcee4773c512e5d22d539b7
[INFO] running `Command { std: "docker" "start" "-a" "d6cf4dc3feefc4c3d9eb0797a8d46393313fc0185fcee4773c512e5d22d539b7", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/simple_string_builder-c57fb2506bd9085e)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests simple-string-builder
[INFO] [stdout] test tests::test_string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - Builder (line 9) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Builder (line 9) stdout ----
[INFO] [stdout] error: expected pattern, found `:`
[INFO] [stdout]  --> src/lib.rs:15:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | let: Result<String, Utf8Error> = b.try_to_string();
[INFO] [stdout]   |    ^ expected pattern
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Builder`
[INFO] [stdout]  --> src/lib.rs:11:13
[INFO] [stdout]   |
[INFO] [stdout] 4 | let mut b = Builder::new();
[INFO] [stdout]   |             ^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 2 | use simple_string_builder::Builder;
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::thread::Builder;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Builder (line 9)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "d6cf4dc3feefc4c3d9eb0797a8d46393313fc0185fcee4773c512e5d22d539b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6cf4dc3feefc4c3d9eb0797a8d46393313fc0185fcee4773c512e5d22d539b7", kill_on_drop: false }`
[INFO] [stdout] d6cf4dc3feefc4c3d9eb0797a8d46393313fc0185fcee4773c512e5d22d539b7