[INFO] fetching crate imag-counter 0.4.0...
[INFO] documenting imag-counter-0.4.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate imag-counter 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate imag-counter 0.4.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate imag-counter 0.4.0
[INFO] finished tweaking crates.io crate imag-counter 0.4.0
[INFO] tweaked toml for crates.io crate imag-counter 0.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded semver v0.8.0
[INFO] [stderr]   Downloaded error-chain v0.10.0
[INFO] [stderr]   Downloaded pest v0.3.3
[INFO] [stderr]   Downloaded itertools v0.6.5
[INFO] [stderr]   Downloaded handlebars v0.29.1
[INFO] [stderr]   Downloaded libimagrt v0.4.0
[INFO] [stderr]   Downloaded libimagutil v0.4.0
[INFO] [stderr]   Downloaded libimagerror v0.4.0
[INFO] [stderr]   Downloaded toml-query v0.3.1
[INFO] [stderr]   Downloaded libimagstore v0.4.0
[INFO] [stderr]   Downloaded libimagcounter v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d38f481a2e52fde536f87ed4f31d0376490b056536bfdfe5b335b53569db5d7
[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" "1d38f481a2e52fde536f87ed4f31d0376490b056536bfdfe5b335b53569db5d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d38f481a2e52fde536f87ed4f31d0376490b056536bfdfe5b335b53569db5d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d38f481a2e52fde536f87ed4f31d0376490b056536bfdfe5b335b53569db5d7", kill_on_drop: false }`
[INFO] [stdout] 1d38f481a2e52fde536f87ed4f31d0376490b056536bfdfe5b335b53569db5d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] 433e5a41416efbd6e773f5a0f59c941f9ea79c650c25950f071c6175ff4172bb
[INFO] running `Command { std: "docker" "start" "-a" "433e5a41416efbd6e773f5a0f59c941f9ea79c650c25950f071c6175ff4172bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking ucd-util v0.1.8
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]     Checking utf8-ranges v1.0.4
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking tinyvec v0.3.4
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking object v0.20.0
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking same-file v0.1.3
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking version v2.0.1
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]     Checking pest v0.3.3
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking miniz_oxide v0.4.1
[INFO] [stderr]     Checking semver v0.8.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking unicode-normalization v0.1.13
[INFO] [stderr]     Checking walkdir v1.0.7
[INFO] [stderr]     Checking itertools v0.6.5
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking libimagerror v0.4.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking tempfile v2.2.0
[INFO] [stderr]     Checking addr2line v0.13.0
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking libimagutil v0.4.0
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking toml-query v0.3.1
[INFO] [stderr]     Checking handlebars v0.29.1
[INFO] [stderr]     Checking libimagstore v0.4.0
[INFO] [stderr]     Checking libimagcounter v0.4.0
[INFO] [stderr]     Checking libimagrt v0.4.0
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libimagrt-0.4.0/src/configuration.rs:270:10
[INFO] [stdout]     |
[INFO] [stdout] 270 |         .flatten()
[INFO] [stdout]     |          ^^^^^^^ multiple `flatten` found
[INFO] [stdout]     |
[INFO] [stdout]     = note: candidate #1 is defined in an impl of the trait `std::iter::Iterator` for the type `std::slice::Iter<'a, T>`
[INFO] [stdout]     = note: candidate #2 is defined in an impl of the trait `itertools::Itertools` for the type `T`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]     |
[INFO] [stdout] 260 |     std::iter::Iterator::flatten(vec![
[INFO] [stdout] 261 |         vec![searchpath.clone()],
[INFO] [stdout] 262 |         gen_vars(searchpath.clone(), variants.clone(), &modifier),
[INFO] [stdout] 263 | 
[INFO] [stdout] 264 |         env::var("HOME").map(|home| gen_vars(PathBuf::from(home), variants.clone(), &modifier))
[INFO] [stdout] 265 |                         .unwrap_or(vec![]),
[INFO] [stdout]   ...
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 260 |     itertools::Itertools::flatten(vec![
[INFO] [stdout] 261 |         vec![searchpath.clone()],
[INFO] [stdout] 262 |         gen_vars(searchpath.clone(), variants.clone(), &modifier),
[INFO] [stdout] 263 | 
[INFO] [stdout] 264 |         env::var("HOME").map(|home| gen_vars(PathBuf::from(home), variants.clone(), &modifier))
[INFO] [stdout] 265 |                         .unwrap_or(vec![]),
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `libimagrt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "433e5a41416efbd6e773f5a0f59c941f9ea79c650c25950f071c6175ff4172bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "433e5a41416efbd6e773f5a0f59c941f9ea79c650c25950f071c6175ff4172bb", kill_on_drop: false }`
[INFO] [stdout] 433e5a41416efbd6e773f5a0f59c941f9ea79c650c25950f071c6175ff4172bb