[INFO] cloning repository https://github.com/dcchut/robbot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dcchut/robbot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcchut%2Frobbot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcchut%2Frobbot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8da6407bd495e6e3804c76bbb94a1f86723c68f3
[INFO] checking dcchut/robbot against master#195ad4830e11a544391abe296b146450dea8411b for pr-82781
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcchut%2Frobbot" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dcchut/robbot on toolchain 195ad4830e11a544391abe296b146450dea8411b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dcchut/robbot
[INFO] finished tweaking git repo https://github.com/dcchut/robbot
[INFO] tweaked toml for git repo https://github.com/dcchut/robbot written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/dcchut/robbot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--no-deps" "--format-version=1", 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] 77b62eb59dd9fe12f521556b11dd59aeeef7048994a49d65ee606006f93ada3f
[INFO] running `Command { std: "docker" "start" "-a" "77b62eb59dd9fe12f521556b11dd59aeeef7048994a49d65ee606006f93ada3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77b62eb59dd9fe12f521556b11dd59aeeef7048994a49d65ee606006f93ada3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77b62eb59dd9fe12f521556b11dd59aeeef7048994a49d65ee606006f93ada3f", kill_on_drop: false }`
[INFO] [stdout] 77b62eb59dd9fe12f521556b11dd59aeeef7048994a49d65ee606006f93ada3f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f047147e24cd738e5149e74bd844cc8ff70d8b1e744a85f7270ce5bfecd45552
[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" "f047147e24cd738e5149e74bd844cc8ff70d8b1e744a85f7270ce5bfecd45552", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking pin-project-lite v0.2.0
[INFO] [stderr]     Checking futures-io v0.3.12
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking smallvec v1.1.0
[INFO] [stderr]     Checking futures-task v0.3.1
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling encoding_rs v0.8.22
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking ipnet v2.3.0
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]    Compiling serenity v0.8.1 (https://github.com/dcchut/serenity?branch=serenity-async-await#51561dd1)
[INFO] [stderr]     Checking regex-syntax v0.6.13
[INFO] [stderr]     Checking humantime v2.0.1
[INFO] [stderr]     Checking uwl v0.6.0
[INFO] [stderr]     Checking random v0.12.2
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]    Compiling openssl-sys v0.9.60
[INFO] [stderr]    Compiling tokio v1.3.0
[INFO] [stderr]    Compiling indexmap v1.3.1
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling libsqlite3-sys v0.20.1
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking input_buffer v0.4.0
[INFO] [stderr]     Checking futures-channel v0.3.12
[INFO] [stderr]     Checking form_urlencoded v1.0.0
[INFO] [stderr]     Checking async-lock v2.3.0
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking http v0.2.0
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling openssl v0.10.32
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking sha-1 v0.9.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking parking_lot_core v0.8.2
[INFO] [stderr]     Checking special v0.8.1
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking regex v1.3.3
[INFO] [stderr]     Checking rand_core v0.6.1
[INFO] [stderr]     Checking dashmap v4.0.2
[INFO] [stderr]     Checking probability v0.17.0
[INFO] [stderr]     Checking num-integer v0.1.42
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking url v2.2.0
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.2
[INFO] [stderr]     Checking http-body v0.4.0
[INFO] [stderr]    Compiling ctor v0.1.16
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling pin-project-internal v0.4.7
[INFO] [stderr]    Compiling pin-project-internal v1.0.3
[INFO] [stderr]    Compiling async-stream-impl v0.3.0
[INFO] [stderr]    Compiling command_attr v0.2.0 (https://github.com/dcchut/serenity?branch=serenity-async-await#51561dd1)
[INFO] [stderr]    Compiling async-trait v0.1.30
[INFO] [stderr]    Compiling diesel_derives v1.4.1
[INFO] [stderr]    Compiling async-recursion v0.3.1
[INFO] [stderr]     Checking value-bag v1.0.0-alpha.6
[INFO] [stderr]     Checking async-stream v0.3.0
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking mio v0.7.7
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking tungstenite v0.12.0
[INFO] [stderr]     Checking pin-project v1.0.3
[INFO] [stderr]     Checking pin-project v0.4.7
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stdout] error[E0432]: unresolved import `futures_core::core_reexport`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/futures-util-0.3.1/src/lib.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub use futures_core::core_reexport;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `core_reexport` in the root
[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 E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures-util`
[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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f047147e24cd738e5149e74bd844cc8ff70d8b1e744a85f7270ce5bfecd45552", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f047147e24cd738e5149e74bd844cc8ff70d8b1e744a85f7270ce5bfecd45552", kill_on_drop: false }`
[INFO] [stdout] f047147e24cd738e5149e74bd844cc8ff70d8b1e744a85f7270ce5bfecd45552