[INFO] fetching crate semververfork 0.1.63...
[INFO] testing semververfork-0.1.63 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate semververfork 0.1.63 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate semververfork 0.1.63 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate semververfork 0.1.63
[INFO] finished tweaking crates.io crate semververfork 0.1.63
[INFO] tweaked toml for crates.io crate semververfork 0.1.63 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate semververfork 0.1.63 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b61b3412dd549b6dbb041c57106515a813b9fba1f7032cf61a77ed8675d824e8
[INFO] running `"docker" "start" "-a" "b61b3412dd549b6dbb041c57106515a813b9fba1f7032cf61a77ed8675d824e8"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling proc-macro2 v1.0.17
[INFO] [stderr]    Compiling syn v1.0.28
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling curl v0.4.29
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling hex v0.4.2
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling opener v0.4.1
[INFO] [stderr]    Compiling humantime v2.0.0
[INFO] [stderr]    Compiling rustc-workspace-hack v1.0.0
[INFO] [stderr]    Compiling bytesize v1.0.1
[INFO] [stderr]    Compiling semververfork v0.1.63 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling im-rc v14.3.0
[INFO] [stderr]    Compiling vte v0.3.3
[INFO] [stderr]    Compiling semver v0.10.0
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling bstr v0.2.13
[INFO] [stderr]    Compiling strip-ansi-escapes v0.1.0
[INFO] [stderr]    Compiling tar v0.4.28
[INFO] [stderr]    Compiling rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling globset v0.4.5
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling bitmaps v2.1.0
[INFO] [stderr]    Compiling openssl-sys v0.9.57
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.3
[INFO] [stderr]    Compiling curl-sys v0.4.31+curl-7.70.0
[INFO] [stderr]    Compiling libssh2-sys v0.2.17
[INFO] [stderr]    Compiling libgit2-sys v0.12.6+1.0.0
[INFO] [stderr]    Compiling ignore v0.4.16
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling openssl v0.10.29
[INFO] [stderr]    Compiling sized-chunks v0.5.3
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]    Compiling crypto-hash v0.3.4
[INFO] [stderr]    Compiling git2 v0.13.6
[INFO] [stderr]    Compiling git2-curl v0.14.0
[INFO] [stderr]    Compiling serde_json v1.0.53
[INFO] [stderr]    Compiling cargo-platform v0.1.1
[INFO] [stderr]    Compiling serde_ignored v0.1.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling crates-io v0.31.0
[INFO] [stderr]    Compiling rustfix v0.5.1
[INFO] [stderr]    Compiling crates-io v0.32.0
[INFO] [stderr]    Compiling cargo v0.44.1
[INFO] [stderr] error[E0463]: can't find crate for `rustc_ast`
[INFO] [stderr]  --> src/lib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | extern crate rustc_ast;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `semververfork`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "b61b3412dd549b6dbb041c57106515a813b9fba1f7032cf61a77ed8675d824e8"`
[INFO] running `"docker" "rm" "-f" "b61b3412dd549b6dbb041c57106515a813b9fba1f7032cf61a77ed8675d824e8"`
[INFO] [stdout] b61b3412dd549b6dbb041c57106515a813b9fba1f7032cf61a77ed8675d824e8