[INFO] fetching crate inkwell 0.2.0...
[INFO] checking inkwell-0.2.0 against master#4d1bd0db7f489b22c6d8aa2385937a95412c015b for pr-114682
[INFO] extracting crate inkwell 0.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate inkwell 0.2.0 on toolchain 4d1bd0db7f489b22c6d8aa2385937a95412c015b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate inkwell 0.2.0
[INFO] finished tweaking crates.io crate inkwell 0.2.0
[INFO] tweaked toml for crates.io crate inkwell 0.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate inkwell 0.2.0 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" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cc v1.0.60
[INFO] [stderr]   Downloaded llvm-sys v150.0.3
[INFO] [stderr]   Downloaded inkwell_internals v0.8.0
[INFO] [stderr]   Downloaded semver v1.0.9
[INFO] [stderr]   Downloaded llvm-sys v120.2.4
[INFO] [stderr]   Downloaded llvm-sys v130.0.4
[INFO] [stderr]   Downloaded llvm-sys v70.4.0
[INFO] [stderr]   Downloaded llvm-sys v60.6.0
[INFO] [stderr]   Downloaded llvm-sys v90.2.1
[INFO] [stderr]   Downloaded llvm-sys v80.3.0
[INFO] [stderr]   Downloaded llvm-sys v100.2.3
[INFO] [stderr]   Downloaded llvm-sys v160.0.2
[INFO] [stderr]   Downloaded llvm-sys v140.0.2
[INFO] [stderr]   Downloaded static-alloc v0.2.1
[INFO] [stderr]   Downloaded llvm-sys v40.4.0
[INFO] [stderr]   Downloaded llvm-sys v50.4.0
[INFO] [stderr]   Downloaded llvm-sys v110.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4b8cea58d9caaa2bdf91edf6355c95c68b206369d7d302b49cbb21875087401
[INFO] running `Command { std: "docker" "start" "-a" "b4b8cea58d9caaa2bdf91edf6355c95c68b206369d7d302b49cbb21875087401", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4b8cea58d9caaa2bdf91edf6355c95c68b206369d7d302b49cbb21875087401", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4b8cea58d9caaa2bdf91edf6355c95c68b206369d7d302b49cbb21875087401", kill_on_drop: false }`
[INFO] [stdout] b4b8cea58d9caaa2bdf91edf6355c95c68b206369d7d302b49cbb21875087401
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b49b498d2b27b362f9ded19367d0322d3604c55ea95f9d541c5b535752fcf7de
[INFO] running `Command { std: "docker" "start" "-a" "b49b498d2b27b362f9ded19367d0322d3604c55ea95f9d541c5b535752fcf7de", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]    Compiling inkwell v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking once_cell v1.17.0
[INFO] [stderr]     Checking either v1.6.1
[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" "b49b498d2b27b362f9ded19367d0322d3604c55ea95f9d541c5b535752fcf7de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b49b498d2b27b362f9ded19367d0322d3604c55ea95f9d541c5b535752fcf7de", kill_on_drop: false }`
[INFO] [stdout] b49b498d2b27b362f9ded19367d0322d3604c55ea95f9d541c5b535752fcf7de
