[INFO] fetching crate pytrace 0.3.3...
[INFO] checking pytrace-0.3.3 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate pytrace 0.3.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate pytrace 0.3.3 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pytrace 0.3.3
[INFO] finished tweaking crates.io crate pytrace 0.3.3
[INFO] tweaked toml for crates.io crate pytrace 0.3.3 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "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" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3cd0b8967455a7f00e6a48467a42f8722f9a0aeb38a191c316279accddf51cc1
[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" "3cd0b8967455a7f00e6a48467a42f8722f9a0aeb38a191c316279accddf51cc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3cd0b8967455a7f00e6a48467a42f8722f9a0aeb38a191c316279accddf51cc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cd0b8967455a7f00e6a48467a42f8722f9a0aeb38a191c316279accddf51cc1", kill_on_drop: false }`
[INFO] [stdout] 3cd0b8967455a7f00e6a48467a42f8722f9a0aeb38a191c316279accddf51cc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8850d1474c35a9b38c7988713493e3513425dea2531e5e3d747422098c8f997
[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" "e8850d1474c35a9b38c7988713493e3513425dea2531e5e3d747422098c8f997", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]    Compiling inventory v0.1.8
[INFO] [stderr]    Compiling unindent v0.1.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]    Compiling pyo3 v0.10.1
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking nix v0.17.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr] error: failed to run custom build command for `pyo3 v0.10.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/pyo3-bc93ef4a50fd9225/build-script-build` (exit code: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Error: "PyO3 requires a nightly or dev version of Rust."
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e8850d1474c35a9b38c7988713493e3513425dea2531e5e3d747422098c8f997", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8850d1474c35a9b38c7988713493e3513425dea2531e5e3d747422098c8f997", kill_on_drop: false }`
[INFO] [stdout] e8850d1474c35a9b38c7988713493e3513425dea2531e5e3d747422098c8f997
