[INFO] fetching crate tree-crasher-c 0.4.0...
[INFO] checking tree-crasher-c-0.4.0 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate tree-crasher-c 0.4.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate tree-crasher-c 0.4.0
[INFO] finished tweaking crates.io crate tree-crasher-c 0.4.0
[INFO] tweaked toml for crates.io crate tree-crasher-c 0.4.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tree-crasher-c 0.4.0 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 tree-crasher-c 0.4.0 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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 74858795ab8ad29a005f3f71e2b0a8c8b04bd0259d62fba329b77263f18ca108
[INFO] running `Command { std: "docker" "start" "-a" "74858795ab8ad29a005f3f71e2b0a8c8b04bd0259d62fba329b77263f18ca108", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74858795ab8ad29a005f3f71e2b0a8c8b04bd0259d62fba329b77263f18ca108", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74858795ab8ad29a005f3f71e2b0a8c8b04bd0259d62fba329b77263f18ca108", kill_on_drop: false }`
[INFO] [stdout] 74858795ab8ad29a005f3f71e2b0a8c8b04bd0259d62fba329b77263f18ca108
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] f843bb805764da0d1c6443a577e22d94f022e38904e0a7820d5fb2a97e58d724
[INFO] running `Command { std: "docker" "start" "-a" "f843bb805764da0d1c6443a577e22d94f022e38904e0a7820d5fb2a97e58d724", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.55
[INFO] [stderr]    Compiling io-lifetimes v1.0.9
[INFO] [stderr]    Compiling rustix v0.37.6
[INFO] [stderr]     Checking regex-syntax v0.7.4
[INFO] [stderr]     Checking linux-raw-sys v0.3.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_derive v1.0.159
[INFO] [stderr]    Compiling tree-sitter v0.20.10
[INFO] [stderr]    Compiling serde v1.0.159
[INFO] [stderr]     Checking anstyle-parse v0.2.0
[INFO] [stderr]    Compiling serde_json v1.0.95
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking anstyle v1.0.0
[INFO] [stderr]     Checking aho-corasick v1.0.1
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking clap_lex v0.5.0
[INFO] [stderr]     Checking fastrand v1.9.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling anyhow v1.0.72
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]    Compiling tree-sitter-c v0.20.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking nu-ansi-term v0.48.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.55/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] 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" "f843bb805764da0d1c6443a577e22d94f022e38904e0a7820d5fb2a97e58d724", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f843bb805764da0d1c6443a577e22d94f022e38904e0a7820d5fb2a97e58d724", kill_on_drop: false }`
[INFO] [stdout] f843bb805764da0d1c6443a577e22d94f022e38904e0a7820d5fb2a97e58d724