[INFO] fetching crate dargo 0.0.6...
[INFO] testing dargo-0.0.6 against 1.90.0 for beta-1.91-3
[INFO] extracting crate dargo 0.0.6 into /workspace/builds/worker-3-tc1/source
[INFO] removed /workspace/builds/worker-3-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate dargo 0.0.6
[INFO] finished tweaking crates.io crate dargo 0.0.6
[INFO] tweaked toml for crates.io crate dargo 0.0.6 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dargo 0.0.6 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 206 packages to latest compatible versions
[INFO] [stderr]       Adding cargo v0.36.0 (available: v0.91.0)
[INFO] [stderr]       Adding colored v1.9.4 (available: v3.0.0)
[INFO] [stderr]       Adding flexi_logger v0.13.4 (available: v0.31.4)
[INFO] [stderr]       Adding semver v0.9.0 (available: v1.0.27)
[INFO] [stderr]       Adding structopt v0.2.18 (available: v0.3.26)
[INFO] [stderr]       Adding toml_edit v0.1.5 (available: v0.23.6)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tabwriter v1.4.1
[INFO] [stderr]   Downloaded shell-escape v0.1.5
[INFO] [stderr]   Downloaded rustfix v0.4.6
[INFO] [stderr]   Downloaded url_serde v0.2.0
[INFO] [stderr]   Downloaded rustc-workspace-hack v1.0.0
[INFO] [stderr]   Downloaded flexi_logger v0.13.4
[INFO] [stderr]   Downloaded serde_ignored v0.0.4
[INFO] [stderr]   Downloaded toml_edit v0.1.5
[INFO] [stderr]   Downloaded crates-io v0.24.0
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[INFO] [stderr]   Downloaded git2-curl v0.9.0
[INFO] [stderr]   Downloaded sized-chunks v0.1.3
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[INFO] [stderr]   Downloaded crypto-hash v0.3.4
[INFO] [stderr]   Downloaded home v0.3.4
[INFO] [stderr]   Downloaded cargo v0.36.0
[INFO] [stderr]   Downloaded im-rc v12.3.4
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[INFO] [stderr]   Downloaded libnghttp2-sys v0.1.11+1.64.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ffd47402bda48843d736c9f534638a0ef93aaae9495a9cc9922fb2d6fc2b3fc
[INFO] running `Command { std: "docker" "start" "-a" "0ffd47402bda48843d736c9f534638a0ef93aaae9495a9cc9922fb2d6fc2b3fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ffd47402bda48843d736c9f534638a0ef93aaae9495a9cc9922fb2d6fc2b3fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ffd47402bda48843d736c9f534638a0ef93aaae9495a9cc9922fb2d6fc2b3fc", kill_on_drop: false }`
[INFO] [stdout] 0ffd47402bda48843d736c9f534638a0ef93aaae9495a9cc9922fb2d6fc2b3fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa391be5251c43eaa3ec56a654f350af7fd7a4cba68892134ad8dc287193cf48
[INFO] running `Command { std: "docker" "start" "-a" "aa391be5251c43eaa3ec56a654f350af7fd7a4cba68892134ad8dc287193cf48", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]    Compiling tinyvec v1.10.0
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling gimli v0.32.3
[INFO] [stderr]    Compiling matches v0.1.10
[INFO] [stderr]    Compiling libz-sys v1.1.22
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.11+1.64.0
[INFO] [stderr]    Compiling curl-sys v0.4.83+curl-8.15.0
[INFO] [stderr]    Compiling libssh2-sys v0.2.23
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.26
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling libgit2-sys v0.7.11
[INFO] [stderr]    Compiling curl v0.4.49
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling socket2 v0.6.0
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling unicode-normalization v0.1.24
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling bstr v1.12.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling linux-raw-sys v0.11.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling http v0.1.21
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling chrono v0.4.42
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling sized-chunks v0.1.3
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling regex-automata v0.4.11
[INFO] [stderr]    Compiling filetime v0.2.26
[INFO] [stderr]    Compiling fastrand v2.3.0
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling addr2line v0.25.1
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]    Compiling tar v0.4.44
[INFO] [stderr]    Compiling flate2 v1.1.2
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]    Compiling is-terminal v0.4.16
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling num_cpus v1.17.0
[INFO] [stderr]    Compiling tempfile v3.23.0
[INFO] [stderr]    Compiling home v0.3.4
[INFO] [stderr]    Compiling bytesize v1.3.3
[INFO] [stderr]    Compiling unicode-width v0.2.1
[INFO] [stderr]    Compiling backtrace v0.3.76
[INFO] [stderr]    Compiling rustc-workspace-hack v1.0.0
[INFO] [stderr]    Compiling shell-escape v0.1.5
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling colored v1.9.4
[INFO] [stderr]    Compiling structopt v0.2.18
[INFO] [stderr]    Compiling tabwriter v1.4.1
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling regex v1.11.3
[INFO] [stderr]    Compiling globset v0.4.16
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling opener v0.3.2
[INFO] [stderr]    Compiling ignore v0.4.23
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling flexi_logger v0.13.4
[INFO] [stderr]    Compiling openssl v0.10.73
[INFO] [stderr]    Compiling toml_edit v0.1.5
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustfix v0.4.6
[INFO] [stderr]    Compiling crates-io v0.24.0
[INFO] [stderr]    Compiling url_serde v0.2.0
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]    Compiling serde_ignored v0.0.4
[INFO] [stderr]    Compiling crypto-hash v0.3.4
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling im-rc v12.3.4
[INFO] [stderr]    Compiling git2 v0.8.0
[INFO] [stderr]    Compiling git2-curl v0.9.0
[INFO] [stderr]    Compiling cargo v0.36.0
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/cargo-0.36.0/src/cargo/util/flock.rs:229:49
[INFO] [stdout]     |
[INFO] [stdout] 229 |                 acquire(config, msg, &path, &|| f.try_lock_shared(), &|| {
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^ expected `Result<(), Error>`, found `Result<(), TryLockError>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected enum `Result<_, std::io::Error>`
[INFO] [stdout]                found enum `Result<_, std::fs::TryLockError>`
[INFO] [stdout] help: use `?` to coerce and return an appropriate `Err`, and wrap the resulting value in `Ok` so the expression remains of type `Result`
[INFO] [stdout]     |
[INFO] [stdout] 229 |                 acquire(config, msg, &path, &|| Ok(f.try_lock_shared()?), &|| {
[INFO] [stdout]     |                                                 +++                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cargo` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "aa391be5251c43eaa3ec56a654f350af7fd7a4cba68892134ad8dc287193cf48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa391be5251c43eaa3ec56a654f350af7fd7a4cba68892134ad8dc287193cf48", kill_on_drop: false }`
[INFO] [stdout] aa391be5251c43eaa3ec56a654f350af7fd7a4cba68892134ad8dc287193cf48