[INFO] fetching crate buchberger 0.1.0...
[INFO] testing buchberger-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate buchberger 0.1.0 into /workspace/builds/worker-45/source
[INFO] validating manifest of crates.io crate buchberger 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate buchberger 0.1.0
[INFO] finished tweaking crates.io crate buchberger 0.1.0
[INFO] tweaked toml for crates.io crate buchberger 0.1.0 written to /workspace/builds/worker-45/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f371ee49c4b27f41c02bea6a6c26cc892a2097d500e1f69b43e4293d11f2f8ab
[INFO] running `Command { std: "docker" "start" "-a" "f371ee49c4b27f41c02bea6a6c26cc892a2097d500e1f69b43e4293d11f2f8ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f371ee49c4b27f41c02bea6a6c26cc892a2097d500e1f69b43e4293d11f2f8ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f371ee49c4b27f41c02bea6a6c26cc892a2097d500e1f69b43e4293d11f2f8ab", kill_on_drop: false }`
[INFO] [stdout] f371ee49c4b27f41c02bea6a6c26cc892a2097d500e1f69b43e4293d11f2f8ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 646011d6d705effa9a77b3cf1652c0adb24a10fa9c02f5b830c2437b554fc13d
[INFO] running `Command { std: "docker" "start" "-a" "646011d6d705effa9a77b3cf1652c0adb24a10fa9c02f5b830c2437b554fc13d", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling ordered-float v1.1.1
[INFO] [stderr]    Compiling buchberger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.04s
[INFO] running `Command { std: "docker" "inspect" "646011d6d705effa9a77b3cf1652c0adb24a10fa9c02f5b830c2437b554fc13d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "646011d6d705effa9a77b3cf1652c0adb24a10fa9c02f5b830c2437b554fc13d", kill_on_drop: false }`
[INFO] [stdout] 646011d6d705effa9a77b3cf1652c0adb24a10fa9c02f5b830c2437b554fc13d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a6b4d69428163d5f793fe6026ac12f7c48961b34b49a7d014058f5432b244f2
[INFO] running `Command { std: "docker" "start" "-a" "0a6b4d69428163d5f793fe6026ac12f7c48961b34b49a7d014058f5432b244f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling buchberger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "0a6b4d69428163d5f793fe6026ac12f7c48961b34b49a7d014058f5432b244f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a6b4d69428163d5f793fe6026ac12f7c48961b34b49a7d014058f5432b244f2", kill_on_drop: false }`
[INFO] [stdout] 0a6b4d69428163d5f793fe6026ac12f7c48961b34b49a7d014058f5432b244f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8a3aa92f2b32fafe3f2b9f82311d8c6f64279062e63bf47f1b6b70282c5339cb
[INFO] running `Command { std: "docker" "start" "-a" "8a3aa92f2b32fafe3f2b9f82311d8c6f64279062e63bf47f1b6b70282c5339cb", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/buchberger-b1934e69d97ddb86)
[INFO] [stdout] 
[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] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/buchberger-b5ddfd2aa4377673)
[INFO] [stdout] 
[INFO] [stdout] 
[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]    Doc-tests buchberger
[INFO] [stderr] error[E0659]: `buchberger` is ambiguous (name vs any other name during import resolution)
[INFO] [stderr]   --> /opt/rustwide/workdir/src/lib.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub use buchberger::groebner;
[INFO] [stderr]    |         ^^^^^^^^^^ ambiguous name
[INFO] [stderr]    |
[INFO] [stderr]    = note: `buchberger` could refer to a crate passed with `--extern`
[INFO] [stderr]    = help: use `::buchberger` to refer to this crate unambiguously
[INFO] [stderr] note: `buchberger` could also refer to the module defined here
[INFO] [stderr]   --> /opt/rustwide/workdir/src/lib.rs:4:1
[INFO] [stderr]    |
[INFO] [stderr] 4  | mod buchberger;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: use `crate::buchberger` 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" "8a3aa92f2b32fafe3f2b9f82311d8c6f64279062e63bf47f1b6b70282c5339cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a3aa92f2b32fafe3f2b9f82311d8c6f64279062e63bf47f1b6b70282c5339cb", kill_on_drop: false }`
[INFO] [stdout] 8a3aa92f2b32fafe3f2b9f82311d8c6f64279062e63bf47f1b6b70282c5339cb