[INFO] fetching crate v_jsonescape 0.4.0...
[INFO] testing v_jsonescape-0.4.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate v_jsonescape 0.4.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate v_jsonescape 0.4.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate v_jsonescape 0.4.0
[INFO] finished tweaking crates.io crate v_jsonescape 0.4.0
[INFO] tweaked toml for crates.io crate v_jsonescape 0.4.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dbe944f3d1fdd91cbcfd57afd4f2750b18e53c9763ca02181dd74485de202fd5
[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" "dbe944f3d1fdd91cbcfd57afd4f2750b18e53c9763ca02181dd74485de202fd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbe944f3d1fdd91cbcfd57afd4f2750b18e53c9763ca02181dd74485de202fd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbe944f3d1fdd91cbcfd57afd4f2750b18e53c9763ca02181dd74485de202fd5", kill_on_drop: false }`
[INFO] [stdout] dbe944f3d1fdd91cbcfd57afd4f2750b18e53c9763ca02181dd74485de202fd5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6845785c223b5b9ff3372b09768944bf2a5f699347429332394b905cd239b858
[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" "6845785c223b5b9ff3372b09768944bf2a5f699347429332394b905cd239b858", kill_on_drop: false }`
[INFO] [stderr]    Compiling v_escape v0.15.0
[INFO] [stderr]    Compiling v_jsonescape v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling buf-min v0.4.0
[INFO] [stderr]    Compiling v_escape_derive v0.8.4
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.17s
[INFO] running `Command { std: "docker" "inspect" "6845785c223b5b9ff3372b09768944bf2a5f699347429332394b905cd239b858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6845785c223b5b9ff3372b09768944bf2a5f699347429332394b905cd239b858", kill_on_drop: false }`
[INFO] [stdout] 6845785c223b5b9ff3372b09768944bf2a5f699347429332394b905cd239b858
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 66a5037612e7aaa3e99f252b6eb6f919163d9eb8433512039c0f72685580d197
[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" "66a5037612e7aaa3e99f252b6eb6f919163d9eb8433512039c0f72685580d197", kill_on_drop: false }`
[INFO] [stderr]    Compiling v_jsonescape v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.77s
[INFO] running `Command { std: "docker" "inspect" "66a5037612e7aaa3e99f252b6eb6f919163d9eb8433512039c0f72685580d197", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66a5037612e7aaa3e99f252b6eb6f919163d9eb8433512039c0f72685580d197", kill_on_drop: false }`
[INFO] [stdout] 66a5037612e7aaa3e99f252b6eb6f919163d9eb8433512039c0f72685580d197
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 81d7ea0119aa29791f9880f093ee5482333544c7da26d43da3f7655b9003da71
[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" "81d7ea0119aa29791f9880f093ee5482333544c7da26d43da3f7655b9003da71", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/v_jsonescape-8d3cecac04996a7e
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests v_jsonescape
[INFO] [stdout] test test::test_escape ... 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 - (line 3) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.58s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "81d7ea0119aa29791f9880f093ee5482333544c7da26d43da3f7655b9003da71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81d7ea0119aa29791f9880f093ee5482333544c7da26d43da3f7655b9003da71", kill_on_drop: false }`
[INFO] [stdout] 81d7ea0119aa29791f9880f093ee5482333544c7da26d43da3f7655b9003da71