[INFO] cloning repository https://github.com/Yasir900aslam/Rustlings-solved
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Yasir900aslam/Rustlings-solved" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYasir900aslam%2FRustlings-solved", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYasir900aslam%2FRustlings-solved'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 09298f5b14d929aab116553eb97812011d9fcdb9
[INFO] building Yasir900aslam/Rustlings-solved against master#222c5724ecc922fe67815f428c19f82c129d9386 for pr-97334
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYasir900aslam%2FRustlings-solved" "/workspace/builds/worker-21/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-21/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Yasir900aslam/Rustlings-solved on toolchain 222c5724ecc922fe67815f428c19f82c129d9386
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Yasir900aslam/Rustlings-solved
[INFO] finished tweaking git repo https://github.com/Yasir900aslam/Rustlings-solved
[INFO] tweaked toml for git repo https://github.com/Yasir900aslam/Rustlings-solved written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] crate git repo https://github.com/Yasir900aslam/Rustlings-solved already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded float-cmp v0.4.0
[INFO] [stderr]   Downloaded normalize-line-endings v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe0e13077aad14454ccbc7f64cb2450fc6d323fb7c0521dcdf4a75005f844ba1
[INFO] running `Command { std: "docker" "start" "-a" "fe0e13077aad14454ccbc7f64cb2450fc6d323fb7c0521dcdf4a75005f844ba1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe0e13077aad14454ccbc7f64cb2450fc6d323fb7c0521dcdf4a75005f844ba1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe0e13077aad14454ccbc7f64cb2450fc6d323fb7c0521dcdf4a75005f844ba1", kill_on_drop: false }`
[INFO] [stdout] fe0e13077aad14454ccbc7f64cb2450fc6d323fb7c0521dcdf4a75005f844ba1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cfff59bf97d9e1d4edcba2a5b641707a032828c5cf167860cfed7adb18ac8bc3
[INFO] running `Command { std: "docker" "start" "-a" "cfff59bf97d9e1d4edcba2a5b641707a032828c5cf167860cfed7adb18ac8bc3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]    Compiling smallvec v0.6.9
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]    Compiling same-file v1.0.4
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling lock_api v0.2.0
[INFO] [stderr]    Compiling walkdir v2.2.7
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling termios v0.3.1
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling clicolors-control v1.0.0
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling inotify-sys v0.1.3
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling filetime v0.2.5
[INFO] [stderr]    Compiling inotify v0.7.0
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling notify v4.0.15
[INFO] [stderr]    Compiling number_prefix v0.2.8
[INFO] [stderr]    Compiling console v0.8.0
[INFO] [stderr]    Compiling console v0.7.7
[INFO] [stderr]    Compiling indicatif v0.10.3
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling rustlings v4.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.63s
[INFO] running `Command { std: "docker" "inspect" "cfff59bf97d9e1d4edcba2a5b641707a032828c5cf167860cfed7adb18ac8bc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfff59bf97d9e1d4edcba2a5b641707a032828c5cf167860cfed7adb18ac8bc3", kill_on_drop: false }`
[INFO] [stdout] cfff59bf97d9e1d4edcba2a5b641707a032828c5cf167860cfed7adb18ac8bc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e875d7c791444d22be38d80b812208c4e7d079c23feb2b836d8256beae9dd9e4
[INFO] running `Command { std: "docker" "start" "-a" "e875d7c791444d22be38d80b812208c4e7d079c23feb2b836d8256beae9dd9e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling predicates-core v1.0.0
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling normalize-line-endings v0.2.2
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling float-cmp v0.4.0
[INFO] [stderr]    Compiling predicates-tree v1.0.0
[INFO] [stderr]    Compiling predicates v1.0.1
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling assert_cmd v0.11.1
[INFO] [stderr]    Compiling rustlings v4.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.57s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-4cd3d4ef980ee747)
[INFO] [stderr]   Executable tests/integration_tests.rs (/opt/rustwide/target/debug/deps/integration_tests-a137819360b20a5d)
[INFO] running `Command { std: "docker" "inspect" "e875d7c791444d22be38d80b812208c4e7d079c23feb2b836d8256beae9dd9e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e875d7c791444d22be38d80b812208c4e7d079c23feb2b836d8256beae9dd9e4", kill_on_drop: false }`
[INFO] [stdout] e875d7c791444d22be38d80b812208c4e7d079c23feb2b836d8256beae9dd9e4