[INFO] fetching crate code-blocks-server 0.6.0...
[INFO] checking code-blocks-server-0.6.0 against master#b3bd7058c139e71bae0862ef8f8ac936208873e9 for pr-123752
[INFO] extracting crate code-blocks-server 0.6.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate code-blocks-server 0.6.0 on toolchain b3bd7058c139e71bae0862ef8f8ac936208873e9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b3bd7058c139e71bae0862ef8f8ac936208873e9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate code-blocks-server 0.6.0
[INFO] finished tweaking crates.io crate code-blocks-server 0.6.0
[INFO] tweaked toml for crates.io crate code-blocks-server 0.6.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate code-blocks-server 0.6.0 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" "+b3bd7058c139e71bae0862ef8f8ac936208873e9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded similar v2.2.1
[INFO] [stderr]   Downloaded code-blocks v0.3.0
[INFO] [stderr]   Downloaded console v0.15.5
[INFO] [stderr]   Downloaded tree-sitter v0.20.9
[INFO] [stderr]   Downloaded tree-sitter-python v0.20.2
[INFO] [stderr]   Downloaded tree-sitter-rust v0.20.3
[INFO] [stderr]   Downloaded insta v1.29.0
[INFO] [stderr]   Downloaded tree-sitter-typescript v0.20.2
[INFO] [stderr]   Downloaded tree-sitter-installer v0.2.0
[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" "+b3bd7058c139e71bae0862ef8f8ac936208873e9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d07a51b1a37a4578e3863aeea09a45567063df4647f7eb998d8944ace33998fe
[INFO] running `Command { std: "docker" "start" "-a" "d07a51b1a37a4578e3863aeea09a45567063df4647f7eb998d8944ace33998fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d07a51b1a37a4578e3863aeea09a45567063df4647f7eb998d8944ace33998fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d07a51b1a37a4578e3863aeea09a45567063df4647f7eb998d8944ace33998fe", kill_on_drop: false }`
[INFO] [stdout] d07a51b1a37a4578e3863aeea09a45567063df4647f7eb998d8944ace33998fe
[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" "+b3bd7058c139e71bae0862ef8f8ac936208873e9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b38503a742d560e3bee954063ef07d728502210c878c4c2f7ad67147c15831e3
[INFO] running `Command { std: "docker" "start" "-a" "b38503a742d560e3bee954063ef07d728502210c878c4c2f7ad67147c15831e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling serde_derive v1.0.159
[INFO] [stderr]    Compiling serde v1.0.159
[INFO] [stderr]    Compiling io-lifetimes v1.0.9
[INFO] [stderr]    Compiling rustix v0.37.6
[INFO] [stderr]     Checking libloading v0.7.4
[INFO] [stderr]     Checking similar v2.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.56/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] [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" "b38503a742d560e3bee954063ef07d728502210c878c4c2f7ad67147c15831e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b38503a742d560e3bee954063ef07d728502210c878c4c2f7ad67147c15831e3", kill_on_drop: false }`
[INFO] [stdout] b38503a742d560e3bee954063ef07d728502210c878c4c2f7ad67147c15831e3
