[INFO] fetching crate mcai 0.2.2...
[INFO] checking mcai-0.2.2 against try#099e089ab723e6ee96175f3496051098c60a4cd4 for pr-140208
[INFO] extracting crate mcai 0.2.2 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate mcai 0.2.2 on toolchain 099e089ab723e6ee96175f3496051098c60a4cd4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+099e089ab723e6ee96175f3496051098c60a4cd4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mcai 0.2.2
[INFO] finished tweaking crates.io crate mcai 0.2.2
[INFO] tweaked toml for crates.io crate mcai 0.2.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate mcai 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+099e089ab723e6ee96175f3496051098c60a4cd4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mcai-client v0.7.0
[INFO] [stderr]   Downloaded bollard-stubs v1.42.0-rc.0
[INFO] [stderr]   Downloaded mcai-graph v0.3.0
[INFO] [stderr]   Downloaded serde_valid v0.2.0
[INFO] [stderr]   Downloaded cargo-lock v7.1.0
[INFO] [stderr]   Downloaded material-icons v0.2.0
[INFO] [stderr]   Downloaded built v0.5.1
[INFO] [stderr]   Downloaded byte-unit v4.0.14
[INFO] [stderr]   Downloaded assert_float_eq v1.1.3
[INFO] [stderr]   Downloaded bollard v0.12.0
[INFO] [stderr]   Downloaded mcai-types v0.1.0
[INFO] [stderr]   Downloaded serde_valid_derive v0.2.0
[INFO] [stderr]   Downloaded topology-traits v0.1.1
[INFO] [stderr]   Downloaded mcai-docker v0.2.1
[INFO] [stderr]   Downloaded mcai-benchmark v0.3.0
[INFO] [stderr]   Downloaded mcai-graph-renderer v0.2.0
[INFO] [stderr]   Downloaded enterpolation v0.1.1
[INFO] [stderr]   Downloaded mcai_models v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+099e089ab723e6ee96175f3496051098c60a4cd4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 277543c9368bb94fdb96a48ceb82dc07403ee3df7fdc1051e69c880abab9c849
[INFO] running `Command { std: "docker" "start" "-a" "277543c9368bb94fdb96a48ceb82dc07403ee3df7fdc1051e69c880abab9c849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "277543c9368bb94fdb96a48ceb82dc07403ee3df7fdc1051e69c880abab9c849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "277543c9368bb94fdb96a48ceb82dc07403ee3df7fdc1051e69c880abab9c849", kill_on_drop: false }`
[INFO] [stdout] 277543c9368bb94fdb96a48ceb82dc07403ee3df7fdc1051e69c880abab9c849
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+099e089ab723e6ee96175f3496051098c60a4cd4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9b10922ceef225b6d88a6a32f1748c27fe0435fea22f1dfa640ca14c7f3d7c0
[INFO] running `Command { std: "docker" "start" "-a" "e9b10922ceef225b6d88a6a32f1748c27fe0435fea22f1dfa640ca14c7f3d7c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.101
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]    Compiling futures-core v0.3.24
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]     Checking once_cell v1.15.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking itoa v1.0.3
[INFO] [stderr]     Checking futures-io v0.3.24
[INFO] [stderr]    Compiling futures-task v0.3.24
[INFO] [stderr]    Compiling futures-util v0.3.24
[INFO] [stderr]    Compiling serde_json v1.0.85
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling futures-channel v0.3.24
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.9
[INFO] [stderr]     Checking ryu v1.0.11
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.46/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]     Checking tracing-core v0.1.29
[INFO] [stderr]     Checking cache-padded v1.2.0
[INFO] [stderr]    Compiling openssl v0.10.42
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking concurrent-queue v1.2.4
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e9b10922ceef225b6d88a6a32f1748c27fe0435fea22f1dfa640ca14c7f3d7c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9b10922ceef225b6d88a6a32f1748c27fe0435fea22f1dfa640ca14c7f3d7c0", kill_on_drop: false }`
[INFO] [stdout] e9b10922ceef225b6d88a6a32f1748c27fe0435fea22f1dfa640ca14c7f3d7c0