[INFO] fetching crate modio-mqttbridge 0.6.1...
[INFO] checking modio-mqttbridge-0.6.1 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate modio-mqttbridge 0.6.1 into /workspace/builds/worker-7-tc2/source
[INFO] removed /workspace/builds/worker-7-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate modio-mqttbridge 0.6.1
[INFO] finished tweaking crates.io crate modio-mqttbridge 0.6.1
[INFO] tweaked toml for crates.io crate modio-mqttbridge 0.6.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate modio-mqttbridge 0.6.1 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate modio-mqttbridge 0.6.1 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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90d47ca8cba78fb1b9065d5333917f0f07fe1bd12c0c230b98911d29d2512ef9
[INFO] running `Command { std: "docker" "start" "-a" "90d47ca8cba78fb1b9065d5333917f0f07fe1bd12c0c230b98911d29d2512ef9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90d47ca8cba78fb1b9065d5333917f0f07fe1bd12c0c230b98911d29d2512ef9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90d47ca8cba78fb1b9065d5333917f0f07fe1bd12c0c230b98911d29d2512ef9", kill_on_drop: false }`
[INFO] [stdout] 90d47ca8cba78fb1b9065d5333917f0f07fe1bd12c0c230b98911d29d2512ef9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53357ee080774623a3827a27c7dd07317a8e89bf692d91c298560e58698df0b0
[INFO] running `Command { std: "docker" "start" "-a" "53357ee080774623a3827a27c7dd07317a8e89bf692d91c298560e58698df0b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling syn v1.0.101
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling futures-core v0.3.24
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]     Checking futures-io v0.3.24
[INFO] [stderr]     Checking futures-sink v0.3.24
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling once_cell v1.15.0
[INFO] [stderr]     Checking cache-padded v1.2.0
[INFO] [stderr]    Compiling polling v2.3.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr]    Compiling aho-corasick v0.7.19
[INFO] [stderr]    Compiling async-io v1.9.0
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]     Checking concurrent-queue v1.2.4
[INFO] [stderr]    Compiling rustls v0.20.6
[INFO] [stderr]     Checking futures-channel v0.3.24
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]     Checking tracing-core v0.1.29
[INFO] [stderr]     Checking sha1_smol v1.0.0
[INFO] [stderr]     Checking async-task v4.3.0
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking rustls-pemfile v1.0.1
[INFO] [stderr]     Checking ordered-stream v0.0.1
[INFO] [stderr]     Checking async-lock v2.5.0
[INFO] [stderr]     Checking spin v0.9.4
[INFO] [stderr]    Compiling argh_shared v0.1.9
[INFO] [stderr]    Compiling serde_json v1.0.85
[INFO] [stderr]     Checking async-channel v1.7.1
[INFO] [stderr]     Checking sha1 v0.6.1
[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 rustls-native-certs v0.6.2
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]     Checking rustls-pemfile v0.3.0
[INFO] [stderr]     Checking nibble_vec v0.1.0
[INFO] [stderr]     Checking pollster v0.2.5
[INFO] [stderr]     Checking configparser v3.0.2
[INFO] [stderr]     Checking radix_trie v0.2.1
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[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" "53357ee080774623a3827a27c7dd07317a8e89bf692d91c298560e58698df0b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53357ee080774623a3827a27c7dd07317a8e89bf692d91c298560e58698df0b0", kill_on_drop: false }`
[INFO] [stdout] 53357ee080774623a3827a27c7dd07317a8e89bf692d91c298560e58698df0b0