[INFO] cloning repository https://github.com/frandelgado/rustlings-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/frandelgado/rustlings-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrandelgado%2Frustlings-solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrandelgado%2Frustlings-solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1d0009f44f08a901d564c7f34619c911b8277831
[INFO] checking frandelgado/rustlings-solutions against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrandelgado%2Frustlings-solutions" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  41% (582/1408)   
Checking out files:  42% (592/1408)   
Checking out files:  43% (606/1408)   
Checking out files:  44% (620/1408)   
Checking out files:  45% (634/1408)   
Checking out files:  46% (648/1408)   
Checking out files:  47% (662/1408)   
Checking out files:  47% (670/1408)   
Checking out files:  48% (676/1408)   
Checking out files:  49% (690/1408)   
Checking out files:  50% (704/1408)   
Checking out files:  51% (719/1408)   
Checking out files:  52% (733/1408)   
Checking out files:  53% (747/1408)   
Checking out files:  54% (761/1408)   
Checking out files:  55% (775/1408)   
Checking out files:  56% (789/1408)   
Checking out files:  57% (803/1408)   
Checking out files:  58% (817/1408)   
Checking out files:  59% (831/1408)   
Checking out files:  60% (845/1408)   
Checking out files:  61% (859/1408)   
Checking out files:  62% (873/1408)   
Checking out files:  63% (888/1408)   
Checking out files:  64% (902/1408)   
Checking out files:  65% (916/1408)   
Checking out files:  66% (930/1408)   
Checking out files:  67% (944/1408)   
Checking out files:  68% (958/1408)   
Checking out files:  69% (972/1408)   
Checking out files:  70% (986/1408)   
Checking out files:  71% (1000/1408)   
Checking out files:  72% (1014/1408)   
Checking out files:  73% (1028/1408)   
Checking out files:  74% (1042/1408)   
Checking out files:  75% (1056/1408)   
Checking out files:  76% (1071/1408)   
Checking out files:  77% (1085/1408)   
Checking out files:  78% (1099/1408)   
Checking out files:  79% (1113/1408)   
Checking out files:  80% (1127/1408)   
Checking out files:  81% (1141/1408)   
Checking out files:  82% (1155/1408)   
Checking out files:  83% (1169/1408)   
Checking out files:  83% (1177/1408)   
Checking out files:  84% (1183/1408)   
Checking out files:  85% (1197/1408)   
Checking out files:  86% (1211/1408)   
Checking out files:  87% (1225/1408)   
Checking out files:  88% (1240/1408)   
Checking out files:  89% (1254/1408)   
Checking out files:  90% (1268/1408)   
Checking out files:  91% (1282/1408)   
Checking out files:  92% (1296/1408)   
Checking out files:  93% (1310/1408)   
Checking out files:  94% (1324/1408)   
Checking out files:  94% (1332/1408)   
Checking out files:  95% (1338/1408)   
Checking out files:  96% (1352/1408)   
Checking out files:  97% (1366/1408)   
Checking out files:  98% (1380/1408)   
Checking out files:  99% (1394/1408)   
Checking out files: 100% (1408/1408)   
Checking out files: 100% (1408/1408), done.
[INFO] validating manifest of git repo https://github.com/frandelgado/rustlings-solutions on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/frandelgado/rustlings-solutions
[INFO] finished tweaking git repo https://github.com/frandelgado/rustlings-solutions
[INFO] tweaked toml for git repo https://github.com/frandelgado/rustlings-solutions written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/frandelgado/rustlings-solutions already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa1fa4a59ea97072ddcc914b157dd4b925370512de1e1e69e385411ab0f390bc
[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" "fa1fa4a59ea97072ddcc914b157dd4b925370512de1e1e69e385411ab0f390bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa1fa4a59ea97072ddcc914b157dd4b925370512de1e1e69e385411ab0f390bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa1fa4a59ea97072ddcc914b157dd4b925370512de1e1e69e385411ab0f390bc", kill_on_drop: false }`
[INFO] [stdout] fa1fa4a59ea97072ddcc914b157dd4b925370512de1e1e69e385411ab0f390bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=forbid" "-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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ffda960b344b6ec904a484b6d44f315272ad08c1258cdfff433ffc42c525d63f
[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" "ffda960b344b6ec904a484b6d44f315272ad08c1258cdfff433ffc42c525d63f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking walkdir v2.2.7
[INFO] [stderr]     Checking lock_api v0.2.0
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]     Checking rand_pcg v0.1.2
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]     Checking aho-corasick v0.7.3
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking clicolors-control v1.0.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.5
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking inotify v0.7.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking notify v4.0.15
[INFO] [stderr]     Checking console v0.8.0
[INFO] [stderr]     Checking console v0.7.7
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking indicatif v0.10.3
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking rustlings v3.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 15s
[INFO] running `Command { std: "docker" "inspect" "ffda960b344b6ec904a484b6d44f315272ad08c1258cdfff433ffc42c525d63f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffda960b344b6ec904a484b6d44f315272ad08c1258cdfff433ffc42c525d63f", kill_on_drop: false }`
[INFO] [stdout] ffda960b344b6ec904a484b6d44f315272ad08c1258cdfff433ffc42c525d63f