[INFO] fetching crate lark-cli 0.1.0...
[INFO] checking lark-cli-0.1.0 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate lark-cli 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate lark-cli 0.1.0 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lark-cli 0.1.0
[INFO] finished tweaking crates.io crate lark-cli 0.1.0
[INFO] tweaked toml for crates.io crate lark-cli 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac56851c57eed8687d159628a5909aca5fc219730c6000927793164148bf2aed
[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" "ac56851c57eed8687d159628a5909aca5fc219730c6000927793164148bf2aed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac56851c57eed8687d159628a5909aca5fc219730c6000927793164148bf2aed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac56851c57eed8687d159628a5909aca5fc219730c6000927793164148bf2aed", kill_on_drop: false }`
[INFO] [stdout] ac56851c57eed8687d159628a5909aca5fc219730c6000927793164148bf2aed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 610503d74f27ff06ec7afd52b415c8c0087651dcadc555be95b7e8d6ae12930c
[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" "610503d74f27ff06ec7afd52b415c8c0087651dcadc555be95b7e8d6ae12930c", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking render-tree v0.1.1
[INFO] [stderr]     Checking salsa v0.9.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking tempfile v2.2.0
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking flexi_logger v0.10.7
[INFO] [stderr]     Checking url_serde v0.2.0
[INFO] [stderr]     Checking serde_json v1.0.58
[INFO] [stderr]     Checking language-reporting v0.3.1
[INFO] [stderr]     Checking languageserver-types v0.53.1
[INFO] [stderr]     Checking lark-span v0.1.0
[INFO] [stderr]     Checking lark-actor v0.1.0
[INFO] [stderr]     Checking lark-language-server v0.1.0
[INFO] [stderr]     Checking lark-error v0.1.0
[INFO] [stderr]     Checking lark-entity v0.1.0
[INFO] [stderr]     Checking lark-ty v0.1.0
[INFO] [stderr]     Checking lark-hir v0.1.0
[INFO] [stderr]     Checking lark-parser v0.1.0
[INFO] [stderr]     Checking lark-pretty-print v0.1.0
[INFO] [stderr]     Checking lark-type-check v0.1.0
[INFO] [stderr]     Checking lark-query-system v0.1.0
[INFO] [stderr]     Checking lark-eval v0.1.0
[INFO] [stderr]     Checking lark-build v0.1.0
[INFO] [stderr]     Checking lark-cli v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(existential_type)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of `#![feature(type_alias_impl_trait)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(existential_type)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of `#![feature(type_alias_impl_trait)]`
[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 E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lark-cli`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "610503d74f27ff06ec7afd52b415c8c0087651dcadc555be95b7e8d6ae12930c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "610503d74f27ff06ec7afd52b415c8c0087651dcadc555be95b7e8d6ae12930c", kill_on_drop: false }`
[INFO] [stdout] 610503d74f27ff06ec7afd52b415c8c0087651dcadc555be95b7e8d6ae12930c