[INFO] fetching crate wesers 0.4.1...
[INFO] testing wesers-0.4.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate wesers 0.4.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate wesers 0.4.1 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 crates.io crate wesers 0.4.1
[INFO] finished tweaking crates.io crate wesers 0.4.1
[INFO] tweaked toml for crates.io crate wesers 0.4.1 written to /workspace/builds/worker-9/source/Cargo.toml
[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] 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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stdout] 8345cacdd4dc70f4bff3fb11b24ef74e99daffad2c666f0e5e1655262dcb4aec
[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" "8345cacdd4dc70f4bff3fb11b24ef74e99daffad2c666f0e5e1655262dcb4aec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8345cacdd4dc70f4bff3fb11b24ef74e99daffad2c666f0e5e1655262dcb4aec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8345cacdd4dc70f4bff3fb11b24ef74e99daffad2c666f0e5e1655262dcb4aec", kill_on_drop: false }`
[INFO] [stdout] 8345cacdd4dc70f4bff3fb11b24ef74e99daffad2c666f0e5e1655262dcb4aec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] afd4f5d63507fafbf73ac161eb774e0e3491416c0bed914e05d7ebb7fce3d1ca
[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" "afd4f5d63507fafbf73ac161eb774e0e3491416c0bed914e05d7ebb7fce3d1ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling traitobject v0.0.1
[INFO] [stderr]    Compiling modifier v0.1.0
[INFO] [stderr]    Compiling yaml-rust v0.3.5
[INFO] [stderr]    Compiling sequence_trie v0.0.13
[INFO] [stderr]    Compiling conduit-mime-types v0.7.3
[INFO] [stderr]    Compiling error v0.1.9
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stderr]    Compiling num_cpus v0.2.13
[INFO] [stderr]    Compiling hpack v0.2.0
[INFO] [stderr]    Compiling mustache v0.7.0
[INFO] [stderr]    Compiling cookie v0.2.5
[INFO] [stderr]    Compiling plugin v0.2.6
[INFO] [stderr]    Compiling solicit v0.4.4
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling hyper v0.9.18
[INFO] [stderr]    Compiling iron v0.4.0
[INFO] [stderr]    Compiling mount v0.2.1
[INFO] [stderr]    Compiling logger v0.1.0
[INFO] [stderr]    Compiling staticfile v0.3.1
[INFO] [stderr]    Compiling wesers v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: environment variable `OUT_DIR` not defined
[INFO] [stdout]   --> build.rs:10:38
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let cargo_target_dir = Path::new(env!("OUT_DIR"))
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wesers`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "afd4f5d63507fafbf73ac161eb774e0e3491416c0bed914e05d7ebb7fce3d1ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afd4f5d63507fafbf73ac161eb774e0e3491416c0bed914e05d7ebb7fce3d1ca", kill_on_drop: false }`
[INFO] [stdout] afd4f5d63507fafbf73ac161eb774e0e3491416c0bed914e05d7ebb7fce3d1ca