[INFO] fetching crate rstring-builder 0.1.4...
[INFO] testing rstring-builder-0.1.4 against 1.49.0 for beta-1.50-1
[INFO] extracting crate rstring-builder 0.1.4 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rstring-builder 0.1.4 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rstring-builder 0.1.4
[INFO] finished tweaking crates.io crate rstring-builder 0.1.4
[INFO] tweaked toml for crates.io crate rstring-builder 0.1.4 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cc40659921ab66398ca2312d626e3af74f6cb7b1e70154c88a96bd572a5a408b
[INFO] running `Command { std: "docker" "start" "-a" "cc40659921ab66398ca2312d626e3af74f6cb7b1e70154c88a96bd572a5a408b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc40659921ab66398ca2312d626e3af74f6cb7b1e70154c88a96bd572a5a408b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc40659921ab66398ca2312d626e3af74f6cb7b1e70154c88a96bd572a5a408b", kill_on_drop: false }`
[INFO] [stdout] cc40659921ab66398ca2312d626e3af74f6cb7b1e70154c88a96bd572a5a408b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 740a58a9053d49e34ce95b51645569d615fa59c8aa8ac8f8f540eaea3342800e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "740a58a9053d49e34ce95b51645569d615fa59c8aa8ac8f8f540eaea3342800e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rstring-builder v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `Command { std: "docker" "inspect" "740a58a9053d49e34ce95b51645569d615fa59c8aa8ac8f8f540eaea3342800e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "740a58a9053d49e34ce95b51645569d615fa59c8aa8ac8f8f540eaea3342800e", kill_on_drop: false }`
[INFO] [stdout] 740a58a9053d49e34ce95b51645569d615fa59c8aa8ac8f8f540eaea3342800e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9929b0c2a4d1bde5d2566475623280d398f556febf8e88b115d347f4e3cb6d06
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9929b0c2a4d1bde5d2566475623280d398f556febf8e88b115d347f4e3cb6d06", kill_on_drop: false }`
[INFO] [stderr]    Compiling rstring-builder v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "9929b0c2a4d1bde5d2566475623280d398f556febf8e88b115d347f4e3cb6d06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9929b0c2a4d1bde5d2566475623280d398f556febf8e88b115d347f4e3cb6d06", kill_on_drop: false }`
[INFO] [stdout] 9929b0c2a4d1bde5d2566475623280d398f556febf8e88b115d347f4e3cb6d06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 97a7757570ebd71cdc70c75ff9cb68afeb2770d1da3b56a837f6f28b457df957
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "97a7757570ebd71cdc70c75ff9cb68afeb2770d1da3b56a837f6f28b457df957", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rstring_builder-9c6b1f11ebc4fcde
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/test_string_builder-75656a8ada2f85d9
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test_string_builder ... ok
[INFO] [stderr]    Doc-tests rstring-builder
[INFO] [stdout] test test_bool ... ok
[INFO] [stdout] test test_num ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/lib.rs - StringBuilder::clear (line 105) ... ok
[INFO] [stdout] test src/lib.rs - StringBuilder::delete_at (line 61) ... ok
[INFO] [stdout] test src/lib.rs - StringBuilder::append (line 30) ... ok
[INFO] [stdout] test src/lib.rs - StringBuilder::is_empty (line 134) ... ok
[INFO] [stdout] test src/lib.rs - StringBuilder::len (line 44) ... ok
[INFO] [stdout] test src/lib.rs - StringBuilder::delete (line 77) ... ok
[INFO] [stdout] test src/lib.rs - StringBuilder::string (line 121) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "97a7757570ebd71cdc70c75ff9cb68afeb2770d1da3b56a837f6f28b457df957", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97a7757570ebd71cdc70c75ff9cb68afeb2770d1da3b56a837f6f28b457df957", kill_on_drop: false }`
[INFO] [stdout] 97a7757570ebd71cdc70c75ff9cb68afeb2770d1da3b56a837f6f28b457df957