[INFO] fetching crate llvm-plugin-inkwell 0.3.0...
[INFO] checking llvm-plugin-inkwell-0.3.0 against master#5518eaa946291f00471af8b254b2a1715f234882 for pr-120393
[INFO] extracting crate llvm-plugin-inkwell 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate llvm-plugin-inkwell 0.3.0 on toolchain 5518eaa946291f00471af8b254b2a1715f234882
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate llvm-plugin-inkwell 0.3.0
[INFO] finished tweaking crates.io crate llvm-plugin-inkwell 0.3.0
[INFO] tweaked toml for crates.io crate llvm-plugin-inkwell 0.3.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate llvm-plugin-inkwell 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" "+5518eaa946291f00471af8b254b2a1715f234882" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded semver v1.0.16
[INFO] [stderr]   Downloaded llvm-sys v70.4.0
[INFO] [stderr]   Downloaded llvm-plugin-inkwell-internals v0.7.0
[INFO] [stderr]   Downloaded alloc-traits v0.1.1
[INFO] [stderr]   Downloaded llvm-sys v160.0.2
[INFO] [stderr]   Downloaded llvm-sys v60.6.0
[INFO] [stderr]   Downloaded pest v2.5.3
[INFO] [stderr]   Downloaded static-alloc v0.2.4
[INFO] [stderr]   Downloaded llvm-sys v50.4.0
[INFO] [stderr]   Downloaded llvm-sys v150.0.3
[INFO] [stderr]   Downloaded llvm-sys v40.4.0
[INFO] [stderr]   Downloaded llvm-sys v120.2.5
[INFO] [stderr]   Downloaded llvm-sys v140.0.3
[INFO] [stderr]   Downloaded llvm-sys v130.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad7090a8f7d9f89fe29661e213b54a7515f6d78839962737b3abd7039c8e23fb
[INFO] running `Command { std: "docker" "start" "-a" "ad7090a8f7d9f89fe29661e213b54a7515f6d78839962737b3abd7039c8e23fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad7090a8f7d9f89fe29661e213b54a7515f6d78839962737b3abd7039c8e23fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad7090a8f7d9f89fe29661e213b54a7515f6d78839962737b3abd7039c8e23fb", kill_on_drop: false }`
[INFO] [stdout] ad7090a8f7d9f89fe29661e213b54a7515f6d78839962737b3abd7039c8e23fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+5518eaa946291f00471af8b254b2a1715f234882" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1dd191da4cb9034a18b36920666bc824358513486147894eed8509677b6d94fa
[INFO] running `Command { std: "docker" "start" "-a" "1dd191da4cb9034a18b36920666bc824358513486147894eed8509677b6d94fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling parking_lot_core v0.9.6
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling llvm-plugin-inkwell v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking once_cell v1.17.0
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]    Compiling lock_api v0.4.9
[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" "1dd191da4cb9034a18b36920666bc824358513486147894eed8509677b6d94fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dd191da4cb9034a18b36920666bc824358513486147894eed8509677b6d94fa", kill_on_drop: false }`
[INFO] [stdout] 1dd191da4cb9034a18b36920666bc824358513486147894eed8509677b6d94fa
