[INFO] crate may 0.3.17 is already in cache
[INFO] testing may-0.3.17 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate may 0.3.17 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate may 0.3.17 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 may 0.3.17
[INFO] finished tweaking crates.io crate may 0.3.17
[INFO] tweaked toml for crates.io crate may 0.3.17 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate may 0.3.17 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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stdout] b958b4140aaf79a024490b28c276ea04ce6012369b6e584f0adadceddebd48b2
[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" "b958b4140aaf79a024490b28c276ea04ce6012369b6e584f0adadceddebd48b2"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling generator v0.6.20
[INFO] [stderr]    Compiling may_queue v0.1.7
[INFO] [stderr]    Compiling may v0.3.17 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling crossbeam v0.7.3
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling socket2 v0.3.11
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.68s
[INFO] running `"docker" "inspect" "b958b4140aaf79a024490b28c276ea04ce6012369b6e584f0adadceddebd48b2"`
[INFO] running `"docker" "rm" "-f" "b958b4140aaf79a024490b28c276ea04ce6012369b6e584f0adadceddebd48b2"`
[INFO] [stdout] b958b4140aaf79a024490b28c276ea04ce6012369b6e584f0adadceddebd48b2
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a7491a5764e769633d188234c7c97741853abb97eded1ef17153185ab187548c
[INFO] running `"docker" "start" "-a" "a7491a5764e769633d188234c7c97741853abb97eded1ef17153185ab187548c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling openssl v0.10.27
[INFO] [stderr]    Compiling input_buffer v0.3.1
[INFO] [stderr]    Compiling aho-corasick v0.7.7
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling openssl-sys v0.9.54
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling sha-1 v0.8.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling regex v1.3.4
[INFO] [stderr]    Compiling tungstenite v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling may v0.3.17 (/opt/rustwide/workdir)
[INFO] [stderr] warning: value assigned to `a` is never read
[INFO] [stderr]    --> tests/lib.rs:225:13
[INFO] [stderr]     |
[INFO] [stderr] 225 |             a = 5;
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `may`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name may --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --emit=dep-info,link -Cembed-bitcode=no -C debuginfo=2 --test -C metadata=8f35c897dc02c618 -C extra-filename=-8f35c897dc02c618 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bytes=/opt/rustwide/target/debug/deps/libbytes-f84ed14a388d339f.rlib --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-9ff44be1a8858f99.rlib --extern docopt=/opt/rustwide/target/debug/deps/libdocopt-738962a150449053.rlib --extern generator=/opt/rustwide/target/debug/deps/libgenerator-771eb3fa8cca925c.rlib --extern httparse=/opt/rustwide/target/debug/deps/libhttparse-d5a9ecda4ab3c948.rlib --extern libc=/opt/rustwide/target/debug/deps/liblibc-1e2f9ce041dcd58a.rlib --extern log=/opt/rustwide/target/debug/deps/liblog-c709ae7ff9aa4321.rlib --extern may_queue=/opt/rustwide/target/debug/deps/libmay_queue-683ed367cfcd3adf.rlib --extern native_tls=/opt/rustwide/target/debug/deps/libnative_tls-6754b629b107e0e4.rlib --extern nix=/opt/rustwide/target/debug/deps/libnix-acd80e4dae94ee8f.rlib --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-c0676f31d0aee2dc.rlib --extern serde=/opt/rustwide/target/debug/deps/libserde-59bac45bd4d0864c.rlib --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-32ca765e35838087.so --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-70291f35d2e6b061.rlib --extern socket2=/opt/rustwide/target/debug/deps/libsocket2-df0eaf6fcf5ddd19.rlib --extern tempdir=/opt/rustwide/target/debug/deps/libtempdir-e89c631a306e08a7.rlib --extern tungstenite=/opt/rustwide/target/debug/deps/libtungstenite-9844cae42b73c5e0.rlib --cap-lints=warn -L native=/opt/rustwide/target/debug/build/generator-b1f5d2ff828d5125/out` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a7491a5764e769633d188234c7c97741853abb97eded1ef17153185ab187548c"`
[INFO] running `"docker" "rm" "-f" "a7491a5764e769633d188234c7c97741853abb97eded1ef17153185ab187548c"`
[INFO] [stdout] a7491a5764e769633d188234c7c97741853abb97eded1ef17153185ab187548c