[INFO] fetching crate unic-langid 0.9.1...
[INFO] checking unic-langid-0.9.1 against master#020bbe46bdf613c0b8211984eaa8e5fe97d6c92d for pr-122960
[INFO] extracting crate unic-langid 0.9.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate unic-langid 0.9.1 on toolchain 020bbe46bdf613c0b8211984eaa8e5fe97d6c92d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unic-langid 0.9.1
[INFO] finished tweaking crates.io crate unic-langid 0.9.1
[INFO] tweaked toml for crates.io crate unic-langid 0.9.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate unic-langid 0.9.1 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" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unic-langid-macros-impl v0.9.1
[INFO] [stderr]   Downloaded unic-langid-macros v0.9.1
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.19
[INFO] [stderr]   Downloaded unic-langid-impl v0.9.1
[INFO] [stderr]   Downloaded serde v1.0.145
[INFO] [stderr]   Downloaded displaydoc v0.2.3
[INFO] [stderr]   Downloaded syn v1.0.102
[INFO] [stderr]   Downloaded tinystr v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f29ba1124c5b1db880422987d298025a8733125d790bdd9a2e7fdff78b82387
[INFO] running `Command { std: "docker" "start" "-a" "2f29ba1124c5b1db880422987d298025a8733125d790bdd9a2e7fdff78b82387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f29ba1124c5b1db880422987d298025a8733125d790bdd9a2e7fdff78b82387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f29ba1124c5b1db880422987d298025a8733125d790bdd9a2e7fdff78b82387", kill_on_drop: false }`
[INFO] [stdout] 2f29ba1124c5b1db880422987d298025a8733125d790bdd9a2e7fdff78b82387
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48233cca6f03567bb03f4ca678c4818149e40976174a7daf7afd9fac95e8ce21
[INFO] running `Command { std: "docker" "start" "-a" "48233cca6f03567bb03f4ca678c4818149e40976174a7daf7afd9fac95e8ce21", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling syn v1.0.102
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.47/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] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[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 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "48233cca6f03567bb03f4ca678c4818149e40976174a7daf7afd9fac95e8ce21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48233cca6f03567bb03f4ca678c4818149e40976174a7daf7afd9fac95e8ce21", kill_on_drop: false }`
[INFO] [stdout] 48233cca6f03567bb03f4ca678c4818149e40976174a7daf7afd9fac95e8ce21