[INFO] crate mdmatter 0.0.1 is already in cache
[INFO] checking mdmatter-0.0.1 against master#4007d4ef26eab44bdabc2b7574d032152264d3ad for pr-66919
[INFO] extracting crate mdmatter 0.0.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate mdmatter 0.0.1 on toolchain 4007d4ef26eab44bdabc2b7574d032152264d3ad
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4007d4ef26eab44bdabc2b7574d032152264d3ad" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mdmatter 0.0.1
[INFO] finished tweaking crates.io crate mdmatter 0.0.1
[INFO] tweaked toml for crates.io crate mdmatter 0.0.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4007d4ef26eab44bdabc2b7574d032152264d3ad" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4007d4ef26eab44bdabc2b7574d032152264d3ad" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+4007d4ef26eab44bdabc2b7574d032152264d3ad" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 104b1df13b54ff2b54fb5d8421fdfd84cf154017a47d3af639321e5a01f52e20
[INFO] running `"docker" "start" "-a" "104b1df13b54ff2b54fb5d8421fdfd84cf154017a47d3af639321e5a01f52e20"`
[INFO] [stderr]     Checking nom v1.2.4
[INFO] [stderr]    Compiling stainless v0.1.12
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/stainless-0.1.12/src/lib.rs:7:30
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(plugin_registrar, quote, rustc_private)]
[INFO] [stderr]   |                              ^^^^^ feature has been removed
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `syntax`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/stainless-0.1.12/src/lib.rs:171:1
[INFO] [stderr]     |
[INFO] [stderr] 171 | extern crate syntax;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0463, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `stainless`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "104b1df13b54ff2b54fb5d8421fdfd84cf154017a47d3af639321e5a01f52e20"`
[INFO] running `"docker" "rm" "-f" "104b1df13b54ff2b54fb5d8421fdfd84cf154017a47d3af639321e5a01f52e20"`
[INFO] [stdout] 104b1df13b54ff2b54fb5d8421fdfd84cf154017a47d3af639321e5a01f52e20