[INFO] cloning repository https://github.com/lekha2809/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lekha2809/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flekha2809%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flekha2809%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52fb1a37d0d95bbbc10dc4915382a44226973fc7
[INFO] checking lekha2809/rust_learning against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flekha2809%2Frust_learning" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lekha2809/rust_learning on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lekha2809/rust_learning
[INFO] finished tweaking git repo https://github.com/lekha2809/rust_learning
[INFO] tweaked toml for git repo https://github.com/lekha2809/rust_learning written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/lekha2809/rust_learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pear_codegen v0.1.5
[INFO] [stderr]   Downloaded rocket_http v0.4.11
[INFO] [stderr]   Downloaded devise_core v0.2.1
[INFO] [stderr]   Downloaded devise v0.2.1
[INFO] [stderr]   Downloaded pear v0.1.5
[INFO] [stderr]   Downloaded cookie v0.11.5
[INFO] [stderr]   Downloaded rocket_codegen v0.4.11
[INFO] [stderr]   Downloaded devise_codegen v0.2.1
[INFO] [stderr]   Downloaded rocket v0.4.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be98970559967f6c5cfd7b51194d59d8239858d5c36dceafacd32745e6e1bc3b
[INFO] running `Command { std: "docker" "start" "-a" "be98970559967f6c5cfd7b51194d59d8239858d5c36dceafacd32745e6e1bc3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be98970559967f6c5cfd7b51194d59d8239858d5c36dceafacd32745e6e1bc3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be98970559967f6c5cfd7b51194d59d8239858d5c36dceafacd32745e6e1bc3b", kill_on_drop: false }`
[INFO] [stdout] be98970559967f6c5cfd7b51194d59d8239858d5c36dceafacd32745e6e1bc3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 46c67da4071468899714c0cf924bdf38f6be9608fa0b9988e3f1917fb3791366
[INFO] running `Command { std: "docker" "start" "-a" "46c67da4071468899714c0cf924bdf38f6be9608fa0b9988e3f1917fb3791366", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling yansi v0.5.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling log v0.4.19
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling matches v0.1.10
[INFO] [stderr]     Checking cpuid-bool v0.2.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling unicode-bidi v0.3.13
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling pear_codegen v0.1.5
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling percent-encoding v2.3.0
[INFO] [stderr]     Checking cpufeatures v0.2.9
[INFO] [stderr]    Compiling serde v1.0.171
[INFO] [stderr]    Compiling rocket_codegen v0.4.11
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]    Compiling smallvec v1.11.0
[INFO] [stderr]    Compiling state v0.4.2
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]    Compiling rocket v0.4.11
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling cookie v0.11.5
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]     Checking cipher v0.2.5
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking universal-hash v0.4.1
[INFO] [stderr]     Checking crypto-mac v0.10.1
[INFO] [stderr]     Checking aead v0.3.2
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking polyval v0.4.5
[INFO] [stderr]     Checking hmac v0.10.1
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]     Checking hkdf v0.10.0
[INFO] [stderr]     Checking aes-soft v0.6.4
[INFO] [stderr]     Checking ctr v0.6.0
[INFO] [stderr]     Checking ghash v0.3.1
[INFO] [stderr]     Checking aes v0.6.0
[INFO] [stderr]     Checking aes-gcm v0.8.0
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]    Compiling devise_core v0.2.1
[INFO] [stderr]    Compiling devise_codegen v0.2.1
[INFO] [stderr]    Compiling devise v0.2.1
[INFO] [stderr]    Compiling pear v0.1.5
[INFO] [stderr]     Checking rocket_http v0.4.11
[INFO] [stderr]     Checking linhtinh v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.27s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: traitobject v0.1.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "46c67da4071468899714c0cf924bdf38f6be9608fa0b9988e3f1917fb3791366", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46c67da4071468899714c0cf924bdf38f6be9608fa0b9988e3f1917fb3791366", kill_on_drop: false }`
[INFO] [stdout] 46c67da4071468899714c0cf924bdf38f6be9608fa0b9988e3f1917fb3791366