[INFO] crate concat-string 1.0.1 is already in cache
[INFO] testing concat-string-1.0.1 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate concat-string 1.0.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate concat-string 1.0.1 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate concat-string 1.0.1
[INFO] finished tweaking crates.io crate concat-string 1.0.1
[INFO] tweaked toml for crates.io crate concat-string 1.0.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f00c418e2024db9a595f3cac03c221f839cf7a9603fadedd25a15e2aae5b5729
[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" "f00c418e2024db9a595f3cac03c221f839cf7a9603fadedd25a15e2aae5b5729", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f00c418e2024db9a595f3cac03c221f839cf7a9603fadedd25a15e2aae5b5729", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f00c418e2024db9a595f3cac03c221f839cf7a9603fadedd25a15e2aae5b5729", kill_on_drop: false }`
[INFO] [stdout] f00c418e2024db9a595f3cac03c221f839cf7a9603fadedd25a15e2aae5b5729
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd1c9fb3395f63f42672403a84d615dba5a66626ee668cb33b5253f0523c82d3
[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" "cd1c9fb3395f63f42672403a84d615dba5a66626ee668cb33b5253f0523c82d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling concat-string v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "cd1c9fb3395f63f42672403a84d615dba5a66626ee668cb33b5253f0523c82d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd1c9fb3395f63f42672403a84d615dba5a66626ee668cb33b5253f0523c82d3", kill_on_drop: false }`
[INFO] [stdout] cd1c9fb3395f63f42672403a84d615dba5a66626ee668cb33b5253f0523c82d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67e828b5115a9ed6561dfa37fdd28f51a9c84b3ff193d5183174ac8690742382
[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" "67e828b5115a9ed6561dfa37fdd28f51a9c84b3ff193d5183174ac8690742382", kill_on_drop: false }`
[INFO] [stderr]    Compiling concat-string v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "67e828b5115a9ed6561dfa37fdd28f51a9c84b3ff193d5183174ac8690742382", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67e828b5115a9ed6561dfa37fdd28f51a9c84b3ff193d5183174ac8690742382", kill_on_drop: false }`
[INFO] [stdout] 67e828b5115a9ed6561dfa37fdd28f51a9c84b3ff193d5183174ac8690742382
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9f6d53f7f136025118f28d911fc649aad2beb4d9888f398a255e3760fdef0dfa
[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" "9f6d53f7f136025118f28d911fc649aad2beb4d9888f398a255e3760fdef0dfa", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/concat_string-3bde820c4b83f922
[INFO] [stdout] test tests::concat_string_0_args ... ok
[INFO] [stdout] test tests::concat_string_1_arg ... ok
[INFO] [stderr]    Doc-tests concat-string
[INFO] [stdout] test tests::concat_string_str_string ... 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 2 tests
[INFO] [stdout] test src/lib.rs - (line 17) ... ok
[INFO] [stdout] test src/lib.rs - concat_string (line 61) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9f6d53f7f136025118f28d911fc649aad2beb4d9888f398a255e3760fdef0dfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f6d53f7f136025118f28d911fc649aad2beb4d9888f398a255e3760fdef0dfa", kill_on_drop: false }`
[INFO] [stdout] 9f6d53f7f136025118f28d911fc649aad2beb4d9888f398a255e3760fdef0dfa