[INFO] fetching crate buff 0.1.0...
[INFO] testing buff-0.1.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate buff 0.1.0 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate buff 0.1.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate buff 0.1.0
[INFO] finished tweaking crates.io crate buff 0.1.0
[INFO] tweaked toml for crates.io crate buff 0.1.0 written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5bed287a09a0608fe7856bd78c407eb0b3c5e392aca177a0ff916bb9cc7d33e4
[INFO] running `Command { std: "docker" "start" "-a" "5bed287a09a0608fe7856bd78c407eb0b3c5e392aca177a0ff916bb9cc7d33e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5bed287a09a0608fe7856bd78c407eb0b3c5e392aca177a0ff916bb9cc7d33e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bed287a09a0608fe7856bd78c407eb0b3c5e392aca177a0ff916bb9cc7d33e4", kill_on_drop: false }`
[INFO] [stdout] 5bed287a09a0608fe7856bd78c407eb0b3c5e392aca177a0ff916bb9cc7d33e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1c89cf891fb2c18039afe709cc85d6b2ec3c976faf93981a34b4192a20c2c18
[INFO] running `Command { std: "docker" "start" "-a" "a1c89cf891fb2c18039afe709cc85d6b2ec3c976faf93981a34b4192a20c2c18", kill_on_drop: false }`
[INFO] [stderr]    Compiling buff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "a1c89cf891fb2c18039afe709cc85d6b2ec3c976faf93981a34b4192a20c2c18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1c89cf891fb2c18039afe709cc85d6b2ec3c976faf93981a34b4192a20c2c18", kill_on_drop: false }`
[INFO] [stdout] a1c89cf891fb2c18039afe709cc85d6b2ec3c976faf93981a34b4192a20c2c18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fbad2c5465fbc08636d4597b9eab7d16a0d5b710e92cbb50901a51c301b1f7a
[INFO] running `Command { std: "docker" "start" "-a" "5fbad2c5465fbc08636d4597b9eab7d16a0d5b710e92cbb50901a51c301b1f7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling buff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "5fbad2c5465fbc08636d4597b9eab7d16a0d5b710e92cbb50901a51c301b1f7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fbad2c5465fbc08636d4597b9eab7d16a0d5b710e92cbb50901a51c301b1f7a", kill_on_drop: false }`
[INFO] [stdout] 5fbad2c5465fbc08636d4597b9eab7d16a0d5b710e92cbb50901a51c301b1f7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 03cddd2c264e0848cf190a64102f522fdb399140939f12358e462a34e9b0575e
[INFO] running `Command { std: "docker" "start" "-a" "03cddd2c264e0848cf190a64102f522fdb399140939f12358e462a34e9b0575e", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/buff-148db8e64f3bcb3a)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests buff
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] error[E0659]: `buff` is ambiguous
[INFO] [stderr]  --> /opt/rustwide/workdir/src/lib.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub use buff::Buffer;
[INFO] [stderr]   |         ^^^^ ambiguous name
[INFO] [stderr]   |
[INFO] [stderr]   = note: ambiguous because of multiple potential import sources
[INFO] [stderr]   = note: `buff` could refer to a crate passed with `--extern`
[INFO] [stderr]   = help: use `::buff` to refer to this crate unambiguously
[INFO] [stderr] note: `buff` could also refer to the module defined here
[INFO] [stderr]  --> /opt/rustwide/workdir/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | mod buff;
[INFO] [stderr]   | ^^^^^^^^^
[INFO] [stderr]   = help: use `crate::buff` to refer to this module unambiguously
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0659`.
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "03cddd2c264e0848cf190a64102f522fdb399140939f12358e462a34e9b0575e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03cddd2c264e0848cf190a64102f522fdb399140939f12358e462a34e9b0575e", kill_on_drop: false }`
[INFO] [stdout] 03cddd2c264e0848cf190a64102f522fdb399140939f12358e462a34e9b0575e