[INFO] crate difference_engine 0.1.0 is already in cache
[INFO] checking difference_engine-0.1.0 against beta-2019-10-27 for pr-65897
[INFO] extracting crate difference_engine 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate difference_engine 0.1.0 on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate difference_engine 0.1.0
[INFO] finished tweaking crates.io crate difference_engine 0.1.0
[INFO] tweaked toml for crates.io crate difference_engine 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] eb5b4f0f632f119a98425324bced5622b82178ae1e9bbf1cfeb34e0630a8f524
[INFO] running `"docker" "start" "-a" "eb5b4f0f632f119a98425324bced5622b82178ae1e9bbf1cfeb34e0630a8f524"`
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling dtoa v0.2.2
[INFO] [stderr]    Compiling itoa v0.1.1
[INFO] [stderr]     Checking vec_map v0.6.0
[INFO] [stderr]     Checking strsim v0.4.1
[INFO] [stderr]     Checking bitflags v0.5.0
[INFO] [stderr]     Checking ansi_term v0.7.5
[INFO] [stderr]     Checking colored v1.2.0
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling target_build_utils v0.1.2
[INFO] [stderr]     Checking clap v2.5.2
[INFO] [stderr]    Compiling serde_json v0.8.6
[INFO] [stderr]    Compiling libloading v0.2.4
[INFO] [stderr]     Checking difference_engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]   --> src/main.rs:85:6
[INFO] [stderr]    |
[INFO] [stderr] 85 |     .flatten()
[INFO] [stderr]    |      ^^^^^^^ multiple `flatten` found
[INFO] [stderr]    |
[INFO] [stderr]    = note: candidate #1 is defined in an impl of the trait `std::iter::Iterator` for the type `std::iter::FlatMap<_, _, _>`
[INFO] [stderr]    = help: to disambiguate the method call, write `std::iter::Iterator::flatten(env::current_dir()
[INFO] [stderr]                .into_iter()
[INFO] [stderr]                .map(|d| d.join(".deng").join("languages").join("raw"))
[INFO] [stderr]                .chain(raw_language_plugin_path.as_ref().into_iter().flat_map(env::split_paths))
[INFO] [stderr]                .chain(env::home_dir().into_iter().map(|d| d.join(".deng").join("languages").join("raw")))
[INFO] [stderr]                .flat_map(|d| d.read_dir().into_iter()))` instead
[INFO] [stderr]    = note: candidate #2 is defined in an impl of the trait `itertools::Itertools` for the type `_`
[INFO] [stderr]    = help: to disambiguate the method call, write `itertools::Itertools::flatten(env::current_dir()
[INFO] [stderr]                .into_iter()
[INFO] [stderr]                .map(|d| d.join(".deng").join("languages").join("raw"))
[INFO] [stderr]                .chain(raw_language_plugin_path.as_ref().into_iter().flat_map(env::split_paths))
[INFO] [stderr]                .chain(env::home_dir().into_iter().map(|d| d.join(".deng").join("languages").join("raw")))
[INFO] [stderr]                .flat_map(|d| d.read_dir().into_iter()))` instead
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
[INFO] [stderr]   --> src/main.rs:92:16
[INFO] [stderr]    |
[INFO] [stderr] 92 |     .flat_map(|p| RawPluginLanguage::load(&p).into_iter()) {
[INFO] [stderr]    |                ^ borrow the `Path` instead
[INFO] [stderr]    |
[INFO] [stderr]    = help: within `std::path::Path`, the trait `std::marker::Sized` is not implemented for `[u8]`
[INFO] [stderr]    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[INFO] [stderr]    = note: required because it appears within the type `std::path::Path`
[INFO] [stderr]    = note: all local variables must have a statically known size
[INFO] [stderr]    = help: unsized locals are gated as an unstable feature
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]    --> src/main.rs:106:6
[INFO] [stderr]     |
[INFO] [stderr] 106 |     .flatten()
[INFO] [stderr]     |      ^^^^^^^ multiple `flatten` found
[INFO] [stderr]     |
[INFO] [stderr]     = note: candidate #1 is defined in an impl of the trait `std::iter::Iterator` for the type `std::iter::FlatMap<_, _, _>`
[INFO] [stderr]     = help: to disambiguate the method call, write `std::iter::Iterator::flatten(env::current_dir()
[INFO] [stderr]                 .into_iter()
[INFO] [stderr]                 .map(|d| d.join(".deng").join("presentations").join("raw"))
[INFO] [stderr]                 .chain(raw_presentation_plugin_path.as_ref().into_iter().flat_map(env::split_paths))
[INFO] [stderr]                 .chain(env::home_dir().into_iter().map(|d| d.join(".deng").join("presentations").join("raw")))
[INFO] [stderr]                 .flat_map(|d| d.read_dir().into_iter()))` instead
[INFO] [stderr]     = note: candidate #2 is defined in an impl of the trait `itertools::Itertools` for the type `_`
[INFO] [stderr]     = help: to disambiguate the method call, write `itertools::Itertools::flatten(env::current_dir()
[INFO] [stderr]                 .into_iter()
[INFO] [stderr]                 .map(|d| d.join(".deng").join("presentations").join("raw"))
[INFO] [stderr]                 .chain(raw_presentation_plugin_path.as_ref().into_iter().flat_map(env::split_paths))
[INFO] [stderr]                 .chain(env::home_dir().into_iter().map(|d| d.join(".deng").join("presentations").join("raw")))
[INFO] [stderr]                 .flat_map(|d| d.read_dir().into_iter()))` instead
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
[INFO] [stderr]    --> src/main.rs:113:16
[INFO] [stderr]     |
[INFO] [stderr] 113 |     .flat_map(|p| RawPluginPresentation::load(&p).into_iter()) {
[INFO] [stderr]     |                ^ borrow the `Path` instead
[INFO] [stderr]     |
[INFO] [stderr]     = help: within `std::path::Path`, the trait `std::marker::Sized` is not implemented for `[u8]`
[INFO] [stderr]     = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[INFO] [stderr]     = note: required because it appears within the type `std::path::Path`
[INFO] [stderr]     = note: all local variables must have a statically known size
[INFO] [stderr]     = help: unsized locals are gated as an unstable feature
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]   --> src/main.rs:85:6
[INFO] [stderr]    |
[INFO] [stderr] 85 |     .flatten()
[INFO] [stderr]    |      ^^^^^^^ multiple `flatten` found
[INFO] [stderr]    |
[INFO] [stderr]    = note: candidate #1 is defined in an impl of the trait `std::iter::Iterator` for the type `std::iter::FlatMap<_, _, _>`
[INFO] [stderr]    = help: to disambiguate the method call, write `std::iter::Iterator::flatten(env::current_dir()
[INFO] [stderr]                .into_iter()
[INFO] [stderr]                .map(|d| d.join(".deng").join("languages").join("raw"))
[INFO] [stderr]                .chain(raw_language_plugin_path.as_ref().into_iter().flat_map(env::split_paths))
[INFO] [stderr]                .chain(env::home_dir().into_iter().map(|d| d.join(".deng").join("languages").join("raw")))
[INFO] [stderr]                .flat_map(|d| d.read_dir().into_iter()))` instead
[INFO] [stderr]    = note: candidate #2 is defined in an impl of the trait `itertools::Itertools` for the type `_`
[INFO] [stderr]    = help: to disambiguate the method call, write `itertools::Itertools::flatten(env::current_dir()
[INFO] [stderr]                .into_iter()
[INFO] [stderr]                .map(|d| d.join(".deng").join("languages").join("raw"))
[INFO] [stderr]                .chain(raw_language_plugin_path.as_ref().into_iter().flat_map(env::split_paths))
[INFO] [stderr]                .chain(env::home_dir().into_iter().map(|d| d.join(".deng").join("languages").join("raw")))
[INFO] [stderr]                .flat_map(|d| d.read_dir().into_iter()))` instead
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
[INFO] [stderr]   --> src/main.rs:92:16
[INFO] [stderr]    |
[INFO] [stderr] 92 |     .flat_map(|p| RawPluginLanguage::load(&p).into_iter()) {
[INFO] [stderr]    |                ^ borrow the `Path` instead
[INFO] [stderr]    |
[INFO] [stderr]    = help: within `std::path::Path`, the trait `std::marker::Sized` is not implemented for `[u8]`
[INFO] [stderr]    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[INFO] [stderr]    = note: required because it appears within the type `std::path::Path`
[INFO] [stderr]    = note: all local variables must have a statically known size
[INFO] [stderr]    = help: unsized locals are gated as an unstable feature
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]    --> src/main.rs:106:6
[INFO] [stderr]     |
[INFO] [stderr] 106 |     .flatten()
[INFO] [stderr]     |      ^^^^^^^ multiple `flatten` found
[INFO] [stderr]     |
[INFO] [stderr]     = note: candidate #1 is defined in an impl of the trait `std::iter::Iterator` for the type `std::iter::FlatMap<_, _, _>`
[INFO] [stderr]     = help: to disambiguate the method call, write `std::iter::Iterator::flatten(env::current_dir()
[INFO] [stderr]                 .into_iter()
[INFO] [stderr]                 .map(|d| d.join(".deng").join("presentations").join("raw"))
[INFO] [stderr]                 .chain(raw_presentation_plugin_path.as_ref().into_iter().flat_map(env::split_paths))
[INFO] [stderr]                 .chain(env::home_dir().into_iter().map(|d| d.join(".deng").join("presentations").join("raw")))
[INFO] [stderr]                 .flat_map(|d| d.read_dir().into_iter()))` instead
[INFO] [stderr]     = note: candidate #2 is defined in an impl of the trait `itertools::Itertools` for the type `_`
[INFO] [stderr]     = help: to disambiguate the method call, write `itertools::Itertools::flatten(env::current_dir()
[INFO] [stderr]                 .into_iter()
[INFO] [stderr]                 .map(|d| d.join(".deng").join("presentations").join("raw"))
[INFO] [stderr]                 .chain(raw_presentation_plugin_path.as_ref().into_iter().flat_map(env::split_paths))
[INFO] [stderr]                 .chain(env::home_dir().into_iter().map(|d| d.join(".deng").join("presentations").join("raw")))
[INFO] [stderr]                 .flat_map(|d| d.read_dir().into_iter()))` instead
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
[INFO] [stderr]    --> src/main.rs:113:16
[INFO] [stderr]     |
[INFO] [stderr] 113 |     .flat_map(|p| RawPluginPresentation::load(&p).into_iter()) {
[INFO] [stderr]     |                ^ borrow the `Path` instead
[INFO] [stderr]     |
[INFO] [stderr]     = help: within `std::path::Path`, the trait `std::marker::Sized` is not implemented for `[u8]`
[INFO] [stderr]     = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[INFO] [stderr]     = note: required because it appears within the type `std::path::Path`
[INFO] [stderr]     = note: all local variables must have a statically known size
[INFO] [stderr]     = help: unsized locals are gated as an unstable feature
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0034, E0277.
[INFO] [stderr] For more information about an error, try `rustc --explain E0034`.
[INFO] [stderr] error: could not compile `difference_engine`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0034, E0277.
[INFO] [stderr] For more information about an error, try `rustc --explain E0034`.
[INFO] [stderr] error: could not compile `difference_engine`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "eb5b4f0f632f119a98425324bced5622b82178ae1e9bbf1cfeb34e0630a8f524"`
[INFO] running `"docker" "rm" "-f" "eb5b4f0f632f119a98425324bced5622b82178ae1e9bbf1cfeb34e0630a8f524"`
[INFO] [stdout] eb5b4f0f632f119a98425324bced5622b82178ae1e9bbf1cfeb34e0630a8f524