[INFO] fetching crate runner 0.5.0...
[INFO] testing runner-0.5.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate runner 0.5.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate runner 0.5.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate runner 0.5.0
[INFO] finished tweaking crates.io crate runner 0.5.0
[INFO] tweaked toml for crates.io crate runner 0.5.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate runner 0.5.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded redox_users v0.3.0
[INFO] [stderr]   Downloaded cfg-if v0.1.7
[INFO] [stderr]   Downloaded scoped_threadpool v0.1.9
[INFO] [stderr]   Downloaded lapp v0.4.0
[INFO] [stderr]   Downloaded quote v0.6.3
[INFO] [stderr]   Downloaded autocfg v0.1.2
[INFO] [stderr]   Downloaded cc v1.0.36
[INFO] [stderr]   Downloaded winapi v0.3.4
[INFO] [stderr]   Downloaded rustc-demangle v0.1.14
[INFO] [stderr]   Downloaded synstructure v0.10.1
[INFO] [stderr]   Downloaded backtrace v0.3.15
[INFO] [stderr]   Downloaded constant_time_eq v0.1.3
[INFO] [stderr]   Downloaded isatty v0.1.8
[INFO] [stderr]   Downloaded toml v0.4.6
[INFO] [stderr]   Downloaded argon2rs v0.2.5
[INFO] [stderr]   Downloaded easy-shortcuts v0.3.0
[INFO] [stderr]   Downloaded libc v0.2.54
[INFO] [stderr]   Downloaded json v0.11.12
[INFO] [stderr]   Downloaded open v1.2.1
[INFO] [stderr]   Downloaded serde_derive v1.0.66
[INFO] [stderr]   Downloaded serde v1.0.66
[INFO] [stderr]   Downloaded syn v0.14.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6471b649edcf4bec485842b9732791fcf3557508de4f3a2d0df10bccca036ca5
[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" "6471b649edcf4bec485842b9732791fcf3557508de4f3a2d0df10bccca036ca5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6471b649edcf4bec485842b9732791fcf3557508de4f3a2d0df10bccca036ca5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6471b649edcf4bec485842b9732791fcf3557508de4f3a2d0df10bccca036ca5", kill_on_drop: false }`
[INFO] [stdout] 6471b649edcf4bec485842b9732791fcf3557508de4f3a2d0df10bccca036ca5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 987f72c25eca837027a776f1aed10e401ada0271b8a5a4fad2551722a5c71057
[INFO] running `Command { std: "docker" "start" "-a" "987f72c25eca837027a776f1aed10e401ada0271b8a5a4fad2551722a5c71057", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.54
[INFO] [stderr]    Compiling serde v1.0.66
[INFO] [stderr]    Compiling easy-shortcuts v0.3.0
[INFO] [stderr]    Compiling lapp v0.4.0
[INFO] [stderr]    Compiling open v1.2.1
[INFO] [stderr]    Compiling json v0.11.12
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]    Compiling isatty v0.1.8
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling serde_derive v1.0.66
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling runner v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.83s
[INFO] running `Command { std: "docker" "inspect" "987f72c25eca837027a776f1aed10e401ada0271b8a5a4fad2551722a5c71057", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "987f72c25eca837027a776f1aed10e401ada0271b8a5a4fad2551722a5c71057", kill_on_drop: false }`
[INFO] [stdout] 987f72c25eca837027a776f1aed10e401ada0271b8a5a4fad2551722a5c71057
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff53f6150995696f0decab3152ec980c224ab4e3c4b466e52fa53fcf72f0b8e6
[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" "ff53f6150995696f0decab3152ec980c224ab4e3c4b466e52fa53fcf72f0b8e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling runner v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected item, found keyword `let`
[INFO] [stdout]  --> examples/read.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | let code = fs::read_to_string("read.rs")?;
[INFO] [stdout]   | ^^^ expected item
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: macro expansion ignores token `{` and any following
[INFO] [stdout]    | 
[INFO] [stdout]   ::: examples/json.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / println!("{}",
[INFO] [stdout] 5  | |     json! ({
[INFO] [stdout] 6  | |         "hello": 42,
[INFO] [stdout] 7  | |     })
[INFO] [stdout] 8  | | );
[INFO] [stdout]    | |__- caused by the macro expansion here
[INFO] [stdout]    |
[INFO] [stdout]    = note: the usage of `println!` is likely invalid in item context
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `runner` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0432]: unresolved import `serde_json`
[INFO] [stdout]  --> examples/json.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_json::json;
[INFO] [stdout]   |     ^^^^^^^^^^ use of undeclared crate or module `serde_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `json`
[INFO] [stdout]  --> examples/json.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | / use serde_json::json;
[INFO] [stdout] 3 | |
[INFO] [stdout] 4 | | println!("{}",
[INFO] [stdout] 5 | |     json! ({
[INFO] [stdout] 6 | |         "hello": 42,
[INFO] [stdout] 7 | |     })
[INFO] [stdout] 8 | | );
[INFO] [stdout]   | |__^ consider adding a `main` function to `examples/json.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0601.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stdout] error: macro expansion ignores token `{` and any following
[INFO] [stdout]    | 
[INFO] [stdout]   ::: examples/hello.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  |   println!("hello, world!");
[INFO] [stdout]    |   -------------------------- caused by the macro expansion here
[INFO] [stdout]    |
[INFO] [stdout]    = note: the usage of `println!` is likely invalid in item context
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `hello`
[INFO] [stdout]  --> examples/hello.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | println!("hello, world!");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ consider adding a `main` function to `examples/hello.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected item, found keyword `let`
[INFO] [stdout]  --> examples/filetime.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | let metadata = fs::metadata("filetime.rs").unwrap();
[INFO] [stdout]   | ^^^ expected item
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[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 E0601`.
[INFO] [stdout] 
[INFO] [stdout] error: expected item, found keyword `let`
[INFO] [stdout]  --> examples/regex.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | let re = Regex::new(r"^\d{4}-\d{2}-\d{2}$").unwrap();
[INFO] [stdout]   | ^^^ expected item
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ff53f6150995696f0decab3152ec980c224ab4e3c4b466e52fa53fcf72f0b8e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff53f6150995696f0decab3152ec980c224ab4e3c4b466e52fa53fcf72f0b8e6", kill_on_drop: false }`
[INFO] [stdout] ff53f6150995696f0decab3152ec980c224ab4e3c4b466e52fa53fcf72f0b8e6
