[INFO] cloning repository https://github.com/RustyGecko/cargo-linkargs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RustyGecko/cargo-linkargs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustyGecko%2Fcargo-linkargs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustyGecko%2Fcargo-linkargs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ee039cd66f65541f4f8b7df22bd4d9bf4579133c
[INFO] testing RustyGecko/cargo-linkargs against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustyGecko%2Fcargo-linkargs" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RustyGecko/cargo-linkargs on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/RustyGecko/cargo-linkargs
[INFO] finished tweaking git repo https://github.com/RustyGecko/cargo-linkargs
[INFO] tweaked toml for git repo https://github.com/RustyGecko/cargo-linkargs written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/RustyGecko/cargo-linkargs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /workspace/builds/worker-1/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang/cargo`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2a031881f90bfa738aa88844e007af9bc36ee62c61fc13bfe864b360ad8d135f
[INFO] running `Command { std: "docker" "start" "-a" "2a031881f90bfa738aa88844e007af9bc36ee62c61fc13bfe864b360ad8d135f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a031881f90bfa738aa88844e007af9bc36ee62c61fc13bfe864b360ad8d135f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a031881f90bfa738aa88844e007af9bc36ee62c61fc13bfe864b360ad8d135f", kill_on_drop: false }`
[INFO] [stdout] 2a031881f90bfa738aa88844e007af9bc36ee62c61fc13bfe864b360ad8d135f
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc2e48c34d8a2a049d2e5f49ebc34d635f489ea26ead6b13f4addf5d58d45850
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bc2e48c34d8a2a049d2e5f49ebc34d635f489ea26ead6b13f4addf5d58d45850", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling curl v0.4.34
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling bytesize v1.0.1
[INFO] [stderr]    Compiling rustc-workspace-hack v1.0.0
[INFO] [stderr]    Compiling opener v0.4.1
[INFO] [stderr]    Compiling shell-escape v0.1.5
[INFO] [stderr]    Compiling im-rc v15.0.0
[INFO] [stderr]    Compiling vte v0.3.3
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling filetime v0.2.13
[INFO] [stderr]    Compiling bstr v0.2.14
[INFO] [stderr]    Compiling bitmaps v2.1.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling strip-ansi-escapes v0.1.0
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling env_logger v0.8.2
[INFO] [stderr]    Compiling tar v0.4.30
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling globset v0.4.6
[INFO] [stderr]    Compiling ignore v0.4.17
[INFO] [stderr]    Compiling openssl-sys v0.9.60
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.5+1.42.0
[INFO] [stderr]    Compiling curl-sys v0.4.39+curl-7.74.0
[INFO] [stderr]    Compiling libssh2-sys v0.2.20
[INFO] [stderr]    Compiling libgit2-sys v0.12.17+1.1.0
[INFO] [stderr]    Compiling docopt v0.6.86
[INFO] [stderr]    Compiling flate2 v1.0.19
[INFO] [stderr]    Compiling sized-chunks v0.6.2
[INFO] [stderr]    Compiling openssl v0.10.32
[INFO] [stderr]    Compiling cargo v0.52.0 (https://github.com/rust-lang/cargo#3bb0968e)
[INFO] [stderr]    Compiling docopt_macros v0.6.88
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/docopt_macros-0.6.88/src/macro.rs:4:30
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(plugin_registrar, quote, rustc_private)]
[INFO] [stdout]   |                              ^^^^^ feature has been removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/docopt_macros-0.6.88/src/macro.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | extern crate syntax;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `docopt_macros`
[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 `Command { std: "docker" "inspect" "bc2e48c34d8a2a049d2e5f49ebc34d635f489ea26ead6b13f4addf5d58d45850", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc2e48c34d8a2a049d2e5f49ebc34d635f489ea26ead6b13f4addf5d58d45850", kill_on_drop: false }`
[INFO] [stdout] bc2e48c34d8a2a049d2e5f49ebc34d635f489ea26ead6b13f4addf5d58d45850