[INFO] cloning repository https://github.com/medfahmy/kvs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/medfahmy/kvs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmedfahmy%2Fkvs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmedfahmy%2Fkvs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e1c89f415972991628b4c2b7267a777a03dfa1d6
[INFO] testing medfahmy/kvs against master#d98a5da813da67eb189387b8ccfb73cf481275d8+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmedfahmy%2Fkvs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/medfahmy/kvs
[INFO] finished tweaking git repo https://github.com/medfahmy/kvs
[INFO] tweaked toml for git repo https://github.com/medfahmy/kvs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/medfahmy/kvs on toolchain d98a5da813da67eb189387b8ccfb73cf481275d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/medfahmy/kvs 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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8f7cfa13958efa0c04f556d378a7786ddea46e82402f1b06d9473ccb27597fcd
[INFO] running `Command { std: "docker" "start" "-a" "8f7cfa13958efa0c04f556d378a7786ddea46e82402f1b06d9473ccb27597fcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f7cfa13958efa0c04f556d378a7786ddea46e82402f1b06d9473ccb27597fcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f7cfa13958efa0c04f556d378a7786ddea46e82402f1b06d9473ccb27597fcd", kill_on_drop: false }`
[INFO] [stdout] 8f7cfa13958efa0c04f556d378a7786ddea46e82402f1b06d9473ccb27597fcd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 057db67e7e0658298c1bf0ee35ee4b21aaf121c71f634cbf06cc4575c18f1c4e
[INFO] running `Command { std: "docker" "start" "-a" "057db67e7e0658298c1bf0ee35ee4b21aaf121c71f634cbf06cc4575c18f1c4e", kill_on_drop: false }`
[INFO] [stderr]    Compiling kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: cannot find attribute `error` in this scope
[INFO] [stdout]  --> src/errors.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 |     #[error("failed to parse command")]
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kvs` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "057db67e7e0658298c1bf0ee35ee4b21aaf121c71f634cbf06cc4575c18f1c4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "057db67e7e0658298c1bf0ee35ee4b21aaf121c71f634cbf06cc4575c18f1c4e", kill_on_drop: false }`
[INFO] [stdout] 057db67e7e0658298c1bf0ee35ee4b21aaf121c71f634cbf06cc4575c18f1c4e