[INFO] fetching crate cargo-readme 3.2.0...
[INFO] building cargo-readme-3.2.0 against master#d5c88c22807925c189328ef9d923c5d2b11a95b8 for pr-87066-3
[INFO] extracting crate cargo-readme 3.2.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate cargo-readme 3.2.0 on toolchain d5c88c22807925c189328ef9d923c5d2b11a95b8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-readme 3.2.0
[INFO] finished tweaking crates.io crate cargo-readme 3.2.0
[INFO] tweaked toml for crates.io crate cargo-readme 3.2.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate cargo-readme 3.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8991d6b57c499fca95e4d8e9eead47d22a32f909831fbf500d38208bf7c1276
[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" "d8991d6b57c499fca95e4d8e9eead47d22a32f909831fbf500d38208bf7c1276", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8991d6b57c499fca95e4d8e9eead47d22a32f909831fbf500d38208bf7c1276", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8991d6b57c499fca95e4d8e9eead47d22a32f909831fbf500d38208bf7c1276", kill_on_drop: false }`
[INFO] [stdout] d8991d6b57c499fca95e4d8e9eead47d22a32f909831fbf500d38208bf7c1276
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "build" "--frozen" "--message-format=json", 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] 7913a353887ef71d8b88fd6636c225869f6b85b61a750866d679cfd22a7defbd
[INFO] running `Command { std: "docker" "start" "-a" "7913a353887ef71d8b88fd6636c225869f6b85b61a750866d679cfd22a7defbd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling regex v1.3.6
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]    Compiling cargo-readme v3.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::string::String::split_off` that must be used
[INFO] [stdout]   --> src/readme/extract.rs:64:17
[INFO] [stdout]    |
[INFO] [stdout] 64 |                 line.split_off(pos);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.08s
[INFO] running `Command { std: "docker" "inspect" "7913a353887ef71d8b88fd6636c225869f6b85b61a750866d679cfd22a7defbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7913a353887ef71d8b88fd6636c225869f6b85b61a750866d679cfd22a7defbd", kill_on_drop: false }`
[INFO] [stdout] 7913a353887ef71d8b88fd6636c225869f6b85b61a750866d679cfd22a7defbd
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "test" "--frozen" "--no-run" "--message-format=json", 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] f02bf26aa85ce16df504d9148bfcc39de9207da23810f6d06f23f6315984c107
[INFO] running `Command { std: "docker" "start" "-a" "f02bf26aa85ce16df504d9148bfcc39de9207da23810f6d06f23f6315984c107", kill_on_drop: false }`
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling environment v0.1.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]    Compiling serde_json v1.0.50
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stdout] warning: unused return value of `std::string::String::split_off` that must be used
[INFO] [stdout]   --> src/readme/extract.rs:64:17
[INFO] [stdout]    |
[INFO] [stdout] 64 |                 line.split_off(pos);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling failure v0.1.7
[INFO] [stderr]    Compiling assert_cli v0.6.3
[INFO] [stderr]    Compiling cargo-readme v3.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::string::String::split_off` that must be used
[INFO] [stdout]   --> src/readme/extract.rs:64:17
[INFO] [stdout]    |
[INFO] [stdout] 64 |                 line.split_off(pos);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 9.43s
[INFO] running `Command { std: "docker" "inspect" "f02bf26aa85ce16df504d9148bfcc39de9207da23810f6d06f23f6315984c107", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f02bf26aa85ce16df504d9148bfcc39de9207da23810f6d06f23f6315984c107", kill_on_drop: false }`
[INFO] [stdout] f02bf26aa85ce16df504d9148bfcc39de9207da23810f6d06f23f6315984c107