[INFO] crate fabric 0.1.2 is already in cache
[INFO] testing fabric-0.1.2 against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] extracting crate fabric 0.1.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate fabric 0.1.2 on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate fabric 0.1.2
[INFO] finished tweaking crates.io crate fabric 0.1.2
[INFO] tweaked toml for crates.io crate fabric 0.1.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7413edfb688097c3ca59792a1f4d2dc4d5db05acbf27d3a406dfca09ada094dd
[INFO] running `"docker" "start" "-a" "7413edfb688097c3ca59792a1f4d2dc4d5db05acbf27d3a406dfca09ada094dd"`
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling aes_frast v0.1.5
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling crossbeam v0.3.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.51
[INFO] [stderr]    Compiling bincode v1.2.1
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling cargo_metadata v0.5.8
[INFO] [stderr]    Compiling deploy-common v0.1.2
[INFO] [stderr]    Compiling fabric v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] error: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:325:8
[INFO] [stderr]     |
[INFO] [stderr] 325 |             let mut pending = &sync::RwLock::new(&mut pending_inner);
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]    --> src/main.rs:55:23
[INFO] [stderr]     |
[INFO] [stderr] 55  | #![deny(missing_docs, warnings, deprecated)]
[INFO] [stderr]     |                       ^^^^^^^^
[INFO] [stderr]     = note: `#[deny(unused_mut)]` implied by `#[deny(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] error: variable does not need to be mutable
[INFO] [stderr]    --> src/scheduler.rs:173:8
[INFO] [stderr]     |
[INFO] [stderr] 173 |             let mut stream = stream.unwrap();
[INFO] [stderr]     |                 ----^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `fabric`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7413edfb688097c3ca59792a1f4d2dc4d5db05acbf27d3a406dfca09ada094dd"`
[INFO] running `"docker" "rm" "-f" "7413edfb688097c3ca59792a1f4d2dc4d5db05acbf27d3a406dfca09ada094dd"`
[INFO] [stdout] 7413edfb688097c3ca59792a1f4d2dc4d5db05acbf27d3a406dfca09ada094dd