[INFO] fetching crate mdrend-dont-use-test-jop0693 0.1.0...
[INFO] checking mdrend-dont-use-test-jop0693-0.1.0 against try#5d9095c550fcec9e458ce8d6b0c04a217641db66 for pr-77153
[INFO] extracting crate mdrend-dont-use-test-jop0693 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate mdrend-dont-use-test-jop0693 0.1.0 on toolchain 5d9095c550fcec9e458ce8d6b0c04a217641db66
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdrend-dont-use-test-jop0693 0.1.0
[INFO] finished tweaking crates.io crate mdrend-dont-use-test-jop0693 0.1.0
[INFO] tweaked toml for crates.io crate mdrend-dont-use-test-jop0693 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate mdrend-dont-use-test-jop0693 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 189990bb2d0025374815306c4891102e7d8d7a5b2d1579a88922a28f540c03dd
[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" "189990bb2d0025374815306c4891102e7d8d7a5b2d1579a88922a28f540c03dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "189990bb2d0025374815306c4891102e7d8d7a5b2d1579a88922a28f540c03dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "189990bb2d0025374815306c4891102e7d8d7a5b2d1579a88922a28f540c03dd", kill_on_drop: false }`
[INFO] [stdout] 189990bb2d0025374815306c4891102e7d8d7a5b2d1579a88922a28f540c03dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f6b61321f7776bcb04d485a1e74008ec19635d28c8607434758123959c4542b8
[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" "f6b61321f7776bcb04d485a1e74008ec19635d28c8607434758123959c4542b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking pulldown-cmark v0.4.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking mdrend-dont-use-test-jop0693 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut res = String::new();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut res = String::new();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut res = String::new();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut res = String::new();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.59s
[INFO] running `Command { std: "docker" "inspect" "f6b61321f7776bcb04d485a1e74008ec19635d28c8607434758123959c4542b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6b61321f7776bcb04d485a1e74008ec19635d28c8607434758123959c4542b8", kill_on_drop: false }`
[INFO] [stdout] f6b61321f7776bcb04d485a1e74008ec19635d28c8607434758123959c4542b8