[INFO] cloning repository https://github.com/SaiintBrisson/RustFirst
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SaiintBrisson/RustFirst" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaiintBrisson%2FRustFirst", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaiintBrisson%2FRustFirst'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1ad2c62620f9118a35d73afc618f184d47223e2c
[INFO] checking SaiintBrisson/RustFirst against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaiintBrisson%2FRustFirst" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SaiintBrisson/RustFirst on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SaiintBrisson/RustFirst
[INFO] finished tweaking git repo https://github.com/SaiintBrisson/RustFirst
[INFO] tweaked toml for git repo https://github.com/SaiintBrisson/RustFirst written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/SaiintBrisson/RustFirst already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tinytemplate v1.0.3
[INFO] [stderr]   Downloaded diesel v1.4.3
[INFO] [stderr]   Downloaded bstr v0.2.9
[INFO] [stderr]   Downloaded csv v1.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2d83de28d446e3dd5521fb8a008ed65322feb0aa9d89358784650ddbe8aca41
[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" "a2d83de28d446e3dd5521fb8a008ed65322feb0aa9d89358784650ddbe8aca41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2d83de28d446e3dd5521fb8a008ed65322feb0aa9d89358784650ddbe8aca41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2d83de28d446e3dd5521fb8a008ed65322feb0aa9d89358784650ddbe8aca41", kill_on_drop: false }`
[INFO] [stdout] a2d83de28d446e3dd5521fb8a008ed65322feb0aa9d89358784650ddbe8aca41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c910a3d5d4f64e24e48fd41eb89d00645c04a6ad331793f66290e96c52b4ea40
[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" "c910a3d5d4f64e24e48fd41eb89d00645c04a6ad331793f66290e96c52b4ea40", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling pq-sys v0.4.6
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking ucd-util v0.1.7
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking bstr v0.2.9
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking rand_os v0.2.2
[INFO] [stderr]     Checking rand_xoshiro v0.3.1
[INFO] [stderr]     Checking criterion-plot v0.4.0
[INFO] [stderr]     Checking tinytemplate v1.0.3
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking csv v1.1.2
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking dotenv v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling diesel_derives v1.4.1
[INFO] [stderr]     Checking diesel v1.4.3
[INFO] [stderr]     Checking criterion v0.3.0
[INFO] [stderr]     Checking rust_first v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let x = establish_connection();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let x = establish_connection();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 38s
[INFO] running `Command { std: "docker" "inspect" "c910a3d5d4f64e24e48fd41eb89d00645c04a6ad331793f66290e96c52b4ea40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c910a3d5d4f64e24e48fd41eb89d00645c04a6ad331793f66290e96c52b4ea40", kill_on_drop: false }`
[INFO] [stdout] c910a3d5d4f64e24e48fd41eb89d00645c04a6ad331793f66290e96c52b4ea40