[INFO] fetching crate ascn-rs 0.3.0...
[INFO] checking ascn-rs-0.3.0 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] extracting crate ascn-rs 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate ascn-rs 0.3.0
[INFO] finished tweaking crates.io crate ascn-rs 0.3.0
[INFO] tweaked toml for crates.io crate ascn-rs 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ascn-rs 0.3.0 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ascn-rs 0.3.0 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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indicatif v0.17.3
[INFO] [stderr]   Downloaded chess v3.2.0
[INFO] [stderr]   Downloaded console v0.15.5
[INFO] [stderr]   Downloaded portable-atomic v0.3.19
[INFO] [stderr]   Downloaded object v0.30.3
[INFO] [stderr]   Downloaded pgn-rs v0.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4cedaf09d1a1223fb16e568f0393b235890a5d4b4cbff4ab31b07a9954d4d898
[INFO] running `Command { std: "docker" "start" "-a" "4cedaf09d1a1223fb16e568f0393b235890a5d4b4cbff4ab31b07a9954d4d898", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cedaf09d1a1223fb16e568f0393b235890a5d4b4cbff4ab31b07a9954d4d898", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cedaf09d1a1223fb16e568f0393b235890a5d4b4cbff4ab31b07a9954d4d898", kill_on_drop: false }`
[INFO] [stdout] 4cedaf09d1a1223fb16e568f0393b235890a5d4b4cbff4ab31b07a9954d4d898
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43dd8e7f09eea0fda8264fbb60298b6be86e5dd29b0d8423860c4931b790b8fb
[INFO] running `Command { std: "docker" "start" "-a" "43dd8e7f09eea0fda8264fbb60298b6be86e5dd29b0d8423860c4931b790b8fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling gimli v0.27.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling rustc-demangle v0.1.23
[INFO] [stderr]    Compiling backtrace v0.3.67
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling portable-atomic v0.3.19
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/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 rand_chacha v0.2.2
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]    Compiling rand v0.7.3
[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" "43dd8e7f09eea0fda8264fbb60298b6be86e5dd29b0d8423860c4931b790b8fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43dd8e7f09eea0fda8264fbb60298b6be86e5dd29b0d8423860c4931b790b8fb", kill_on_drop: false }`
[INFO] [stdout] 43dd8e7f09eea0fda8264fbb60298b6be86e5dd29b0d8423860c4931b790b8fb