[INFO] crate guard_let 0.1.2 is already in cache
[INFO] testing guard_let-0.1.2 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate guard_let 0.1.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate guard_let 0.1.2 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 guard_let 0.1.2
[INFO] finished tweaking crates.io crate guard_let 0.1.2
[INFO] tweaked toml for crates.io crate guard_let 0.1.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 7e233c8f102d7ddc980c440563554a5cba913d5b4e640c499b8e7dd4ed912f45
[INFO] running `"docker" "start" "-a" "7e233c8f102d7ddc980c440563554a5cba913d5b4e640c499b8e7dd4ed912f45"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling pmutil v0.5.3
[INFO] [stderr]    Compiling guard_let v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.94s
[INFO] running `"docker" "inspect" "7e233c8f102d7ddc980c440563554a5cba913d5b4e640c499b8e7dd4ed912f45"`
[INFO] running `"docker" "rm" "-f" "7e233c8f102d7ddc980c440563554a5cba913d5b4e640c499b8e7dd4ed912f45"`
[INFO] [stdout] 7e233c8f102d7ddc980c440563554a5cba913d5b4e640c499b8e7dd4ed912f45
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 52cfbfed217709b0d3d88c5a861f2e0aae38400d910857891b0cd5044392c263
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "52cfbfed217709b0d3d88c5a861f2e0aae38400d910857891b0cd5044392c263"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling guard_let v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0277]: `Enum` doesn't implement `std::fmt::Debug`
[INFO] [stderr]   --> tests/usage.rs:21:38
[INFO] [stderr]    |
[INFO] [stderr] 21 |         println!("v is not A: {:?}", v);
[INFO] [stderr]    |                                      ^ `Enum` cannot be formatted using `{:?}`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::fmt::Debug` is not implemented for `Enum`
[INFO] [stderr]    = note: add `#[derive(Debug)]` or manually implement `std::fmt::Debug`
[INFO] [stderr]    = note: required by `std::fmt::Debug::fmt`
[INFO] [stderr]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: `Enum` doesn't implement `std::fmt::Debug`
[INFO] [stderr]   --> tests/usage.rs:35:38
[INFO] [stderr]    |
[INFO] [stderr] 35 |         println!("v is not C: {:?}", v);
[INFO] [stderr]    |                                      ^ `Enum` cannot be formatted using `{:?}`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::fmt::Debug` is not implemented for `Enum`
[INFO] [stderr]    = note: add `#[derive(Debug)]` or manually implement `std::fmt::Debug`
[INFO] [stderr]    = note: required by `std::fmt::Debug::fmt`
[INFO] [stderr]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `guard_let`.
[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" "52cfbfed217709b0d3d88c5a861f2e0aae38400d910857891b0cd5044392c263"`
[INFO] running `"docker" "rm" "-f" "52cfbfed217709b0d3d88c5a861f2e0aae38400d910857891b0cd5044392c263"`
[INFO] [stdout] 52cfbfed217709b0d3d88c5a861f2e0aae38400d910857891b0cd5044392c263