[INFO] fetching crate singularity 0.7.0...
[INFO] testing singularity-0.7.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate singularity 0.7.0 into /workspace/builds/worker-50/source
[INFO] validating manifest of crates.io crate singularity 0.7.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate singularity 0.7.0
[INFO] finished tweaking crates.io crate singularity 0.7.0
[INFO] tweaked toml for crates.io crate singularity 0.7.0 written to /workspace/builds/worker-50/source/Cargo.toml
[INFO] crate crates.io crate singularity 0.7.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1977c1ab238c9f3f838c0330f28686d998be0670ddbbcc6f1e492abb6c66bdbe
[INFO] running `Command { std: "docker" "start" "-a" "1977c1ab238c9f3f838c0330f28686d998be0670ddbbcc6f1e492abb6c66bdbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1977c1ab238c9f3f838c0330f28686d998be0670ddbbcc6f1e492abb6c66bdbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1977c1ab238c9f3f838c0330f28686d998be0670ddbbcc6f1e492abb6c66bdbe", kill_on_drop: false }`
[INFO] [stdout] 1977c1ab238c9f3f838c0330f28686d998be0670ddbbcc6f1e492abb6c66bdbe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e461a26d3d26c414db3647ad8d78debbda5dbe3b773cfd7aa7bdc0988759401e
[INFO] running `Command { std: "docker" "start" "-a" "e461a26d3d26c414db3647ad8d78debbda5dbe3b773cfd7aa7bdc0988759401e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling regex-syntax v0.6.22
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling number_prefix v0.3.0
[INFO] [stderr]    Compiling chunked_transfer v1.4.0
[INFO] [stderr]    Compiling tinyvec v1.1.1
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling fern v0.6.0
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling unicode-normalization v0.1.17
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling terminal_size v0.1.16
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling directories v2.0.2
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling num-format v0.4.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling idna v0.2.2
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling regex v1.4.3
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling console v0.14.0
[INFO] [stderr]    Compiling indicatif v0.15.0
[INFO] [stderr]    Compiling webpki v0.21.4
[INFO] [stderr]    Compiling sct v0.6.0
[INFO] [stderr]    Compiling webpki-roots v0.21.0
[INFO] [stderr]    Compiling rustls v0.19.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling structopt v0.3.21
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling url v2.2.1
[INFO] [stderr]    Compiling ureq v2.0.1
[INFO] [stderr]    Compiling confy v0.4.0
[INFO] [stderr]    Compiling singularity v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 51.32s
[INFO] running `Command { std: "docker" "inspect" "e461a26d3d26c414db3647ad8d78debbda5dbe3b773cfd7aa7bdc0988759401e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e461a26d3d26c414db3647ad8d78debbda5dbe3b773cfd7aa7bdc0988759401e", kill_on_drop: false }`
[INFO] [stdout] e461a26d3d26c414db3647ad8d78debbda5dbe3b773cfd7aa7bdc0988759401e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a76e7cc6cfae3a0cf5e533e39227eb1e84cc301cd535b9aebf6fd0c784dd429
[INFO] running `Command { std: "docker" "start" "-a" "9a76e7cc6cfae3a0cf5e533e39227eb1e84cc301cd535b9aebf6fd0c784dd429", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling singularity v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.31s
[INFO] running `Command { std: "docker" "inspect" "9a76e7cc6cfae3a0cf5e533e39227eb1e84cc301cd535b9aebf6fd0c784dd429", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a76e7cc6cfae3a0cf5e533e39227eb1e84cc301cd535b9aebf6fd0c784dd429", kill_on_drop: false }`
[INFO] [stdout] 9a76e7cc6cfae3a0cf5e533e39227eb1e84cc301cd535b9aebf6fd0c784dd429
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c38a98637ba7ed59893b2225ab15cb20b9f7f0c965d6b0e382162a0460168f1f
[INFO] running `Command { std: "docker" "start" "-a" "c38a98637ba7ed59893b2225ab15cb20b9f7f0c965d6b0e382162a0460168f1f", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/singularity-9f2ff8e268e1fa39)
[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] running `Command { std: "docker" "inspect" "c38a98637ba7ed59893b2225ab15cb20b9f7f0c965d6b0e382162a0460168f1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c38a98637ba7ed59893b2225ab15cb20b9f7f0c965d6b0e382162a0460168f1f", kill_on_drop: false }`
[INFO] [stdout] c38a98637ba7ed59893b2225ab15cb20b9f7f0c965d6b0e382162a0460168f1f