[INFO] fetching crate source-span 2.6.0...
[INFO] checking source-span-2.6.0 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate source-span 2.6.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate source-span 2.6.0 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate source-span 2.6.0
[INFO] finished tweaking crates.io crate source-span 2.6.0
[INFO] tweaked toml for crates.io crate source-span 2.6.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate source-span 2.6.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8-decode v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a949eeae177859cecd886a06fd4d8ea81085db1f9d42aa2a28fdc05b972d68ec
[INFO] running `Command { std: "docker" "start" "-a" "a949eeae177859cecd886a06fd4d8ea81085db1f9d42aa2a28fdc05b972d68ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a949eeae177859cecd886a06fd4d8ea81085db1f9d42aa2a28fdc05b972d68ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a949eeae177859cecd886a06fd4d8ea81085db1f9d42aa2a28fdc05b972d68ec", kill_on_drop: false }`
[INFO] [stdout] a949eeae177859cecd886a06fd4d8ea81085db1f9d42aa2a28fdc05b972d68ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0a81ad977ca8652b812ee6a10a8c03abd469b7a63692aa43d9de09908815fac
[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" "b0a81ad977ca8652b812ee6a10a8c03abd469b7a63692aa43d9de09908815fac", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]     Checking utf8-decode v1.0.1
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Checking source-span v2.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `string`
[INFO] [stdout]  --> examples/formatting_challenge.rs:8:2
[INFO] [stdout]   |
[INFO] [stdout] 8 |     string: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `span`
[INFO] [stdout]  --> examples/formatting_challenge.rs:9:2
[INFO] [stdout]   |
[INFO] [stdout] 9 |     span: Span,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.58s
[INFO] running `Command { std: "docker" "inspect" "b0a81ad977ca8652b812ee6a10a8c03abd469b7a63692aa43d9de09908815fac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0a81ad977ca8652b812ee6a10a8c03abd469b7a63692aa43d9de09908815fac", kill_on_drop: false }`
[INFO] [stdout] b0a81ad977ca8652b812ee6a10a8c03abd469b7a63692aa43d9de09908815fac