[INFO] updating cached repository https://github.com/HVHO/rust-study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d08ee95907fd2548326649e3a6de6283e4e8ed8d
[INFO] testing HVHO/rust-study against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHVHO%2Frust-study" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  54% (20/37)   
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Checking out files: 100% (37/37), done.
[INFO] validating manifest of git repo https://github.com/HVHO/rust-study 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 git repo https://github.com/HVHO/rust-study
[INFO] finished tweaking git repo https://github.com/HVHO/rust-study
[INFO] tweaked toml for git repo https://github.com/HVHO/rust-study written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/HVHO/rust-study already has a lockfile, it will not be regenerated
[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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--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] 817f6349c1ad8080cc7c3c8cf16b9f05b634c6bdf91a429caad04e120ce6737e
[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" "817f6349c1ad8080cc7c3c8cf16b9f05b634c6bdf91a429caad04e120ce6737e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "817f6349c1ad8080cc7c3c8cf16b9f05b634c6bdf91a429caad04e120ce6737e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "817f6349c1ad8080cc7c3c8cf16b9f05b634c6bdf91a429caad04e120ce6737e", kill_on_drop: false }`
[INFO] [stdout] 817f6349c1ad8080cc7c3c8cf16b9f05b634c6bdf91a429caad04e120ce6737e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 128cc3d6482791a273f6598b37a22b713118bc9eb7d3f7bfcc30b5764289287c
[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" "128cc3d6482791a273f6598b37a22b713118bc9eb7d3f7bfcc30b5764289287c", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the size for values of type `str` cannot be known at compilation time
[INFO] [stdout]   --> src/main.rs:14:15
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Some(&x)if x == y => println!("case 1"),
[INFO] [stdout]    |               ^ doesn't have a size known at compile-time
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::marker::Sized` is not implemented for `str`
[INFO] [stdout]    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[INFO] [stdout]    = note: all local variables must have a statically known size
[INFO] [stdout]    = help: unsized locals are gated as an unstable feature
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `str` with `{integer}`
[INFO] [stdout]   --> src/main.rs:14:22
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Some(&x)if x == y => println!("case 1"),
[INFO] [stdout]    |                      ^^ no implementation for `str == {integer}`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::cmp::PartialEq<{integer}>` is not implemented for `str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_study`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "128cc3d6482791a273f6598b37a22b713118bc9eb7d3f7bfcc30b5764289287c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "128cc3d6482791a273f6598b37a22b713118bc9eb7d3f7bfcc30b5764289287c", kill_on_drop: false }`
[INFO] [stdout] 128cc3d6482791a273f6598b37a22b713118bc9eb7d3f7bfcc30b5764289287c