[INFO] fetching crate query-params-serialize 0.0.1...
[INFO] testing query-params-serialize-0.0.1 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate query-params-serialize 0.0.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate query-params-serialize 0.0.1 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 query-params-serialize 0.0.1
[INFO] finished tweaking crates.io crate query-params-serialize 0.0.1
[INFO] tweaked toml for crates.io crate query-params-serialize 0.0.1 written to /workspace/builds/worker-2/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "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] 1359555916fd1e5abb8a5747abe05541f368b6f6786464144d1342edc3697109
[INFO] running `"docker" "start" "-a" "1359555916fd1e5abb8a5747abe05541f368b6f6786464144d1342edc3697109"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling gimli v0.21.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling object v0.19.0
[INFO] [stderr]    Compiling bytes v0.5.4
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling addr2line v0.12.1
[INFO] [stderr]    Compiling backtrace v0.3.48
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling query-params-serialize v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(str_strip)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `query-params-serialize`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1359555916fd1e5abb8a5747abe05541f368b6f6786464144d1342edc3697109"`
[INFO] running `"docker" "rm" "-f" "1359555916fd1e5abb8a5747abe05541f368b6f6786464144d1342edc3697109"`
[INFO] [stdout] 1359555916fd1e5abb8a5747abe05541f368b6f6786464144d1342edc3697109