[INFO] fetching crate mom-task 1.3.0...
[INFO] building mom-task-1.3.0 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate mom-task 1.3.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate mom-task 1.3.0
[INFO] finished tweaking crates.io crate mom-task 1.3.0
[INFO] tweaked toml for crates.io crate mom-task 1.3.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mom-task 1.3.0 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mom-task 1.3.0 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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9cd885d8120ac68fbc8882e23e966df80a2bc4802a672dd211b96a3c9759ec24
[INFO] running `Command { std: "docker" "start" "-a" "9cd885d8120ac68fbc8882e23e966df80a2bc4802a672dd211b96a3c9759ec24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cd885d8120ac68fbc8882e23e966df80a2bc4802a672dd211b96a3c9759ec24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cd885d8120ac68fbc8882e23e966df80a2bc4802a672dd211b96a3c9759ec24", kill_on_drop: false }`
[INFO] [stdout] 9cd885d8120ac68fbc8882e23e966df80a2bc4802a672dd211b96a3c9759ec24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6dd05af0e7e89b343e606ced715322c95f54154ad95d3c07bb0d058c3992c34a
[INFO] running `Command { std: "docker" "start" "-a" "6dd05af0e7e89b343e606ced715322c95f54154ad95d3c07bb0d058c3992c34a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling proc-macro2 v1.0.58
[INFO] [stderr]    Compiling quote v1.0.27
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling regex-syntax v0.7.1
[INFO] [stderr]    Compiling uncased v0.9.9
[INFO] [stderr]    Compiling io-lifetimes v1.0.10
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling aho-corasick v1.0.1
[INFO] [stderr]    Compiling linux-raw-sys v0.3.7
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling bstr v1.4.0
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling option-ext v0.2.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.58/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]    Compiling phf_shared v0.10.0
[INFO] [stderr]    Compiling anstyle-parse v0.2.0
[INFO] [stderr]    Compiling walkdir v2.3.3
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling anstyle v1.0.0
[INFO] [stderr]    Compiling phf v0.10.1
[INFO] [stderr]    Compiling iana-time-zone v0.1.56
[INFO] [stderr]    Compiling deunicode v0.4.3
[INFO] [stderr]    Compiling chrono v0.4.24
[INFO] [stderr]    Compiling clap_lex v0.4.1
[INFO] [stderr]    Compiling unsafe-libyaml v0.2.8
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[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" "6dd05af0e7e89b343e606ced715322c95f54154ad95d3c07bb0d058c3992c34a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dd05af0e7e89b343e606ced715322c95f54154ad95d3c07bb0d058c3992c34a", kill_on_drop: false }`
[INFO] [stdout] 6dd05af0e7e89b343e606ced715322c95f54154ad95d3c07bb0d058c3992c34a