[INFO] fetching crate runner 0.5.0...
[INFO] testing runner-0.5.0 against 1.75.0 for beta-1.76-1
[INFO] extracting crate runner 0.5.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate runner 0.5.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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-5-tc1/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lapp v0.4.0
[INFO] [stderr]   Downloaded cfg-if v0.1.7
[INFO] [stderr]   Downloaded toml v0.4.6
[INFO] [stderr]   Downloaded cc v1.0.36
[INFO] [stderr]   Downloaded rustc-demangle v0.1.14
[INFO] [stderr]   Downloaded backtrace v0.3.15
[INFO] [stderr]   Downloaded serde v1.0.66
[INFO] [stderr]   Downloaded syn v0.14.2
[INFO] [stderr]   Downloaded libc v0.2.54
[INFO] [stderr]   Downloaded winapi v0.3.4
[INFO] [stderr]   Downloaded synstructure v0.10.1
[INFO] [stderr]   Downloaded serde_derive v1.0.66
[INFO] [stderr]   Downloaded quote v0.6.3
[INFO] [stderr]   Downloaded isatty v0.1.8
[INFO] [stderr]   Downloaded open v1.2.1
[INFO] [stderr]   Downloaded easy-shortcuts v0.3.0
[INFO] [stderr]   Downloaded json v0.11.12
[INFO] [stderr]   Downloaded syn v0.15.34
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a802511cb79acdcf86433c1451063111142a12f3b97b465ca5e342bd137951bb
[INFO] running `Command { std: "docker" "start" "-a" "a802511cb79acdcf86433c1451063111142a12f3b97b465ca5e342bd137951bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a802511cb79acdcf86433c1451063111142a12f3b97b465ca5e342bd137951bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a802511cb79acdcf86433c1451063111142a12f3b97b465ca5e342bd137951bb", kill_on_drop: false }`
[INFO] [stdout] a802511cb79acdcf86433c1451063111142a12f3b97b465ca5e342bd137951bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ce8b5096e76be607674fb2785824f3f4a0679024ddab66b2365ae0ad7c0057d
[INFO] running `Command { std: "docker" "start" "-a" "4ce8b5096e76be607674fb2785824f3f4a0679024ddab66b2365ae0ad7c0057d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling libc v0.2.54
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling serde v1.0.66
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling json v0.11.12
[INFO] [stderr]    Compiling open v1.2.1
[INFO] [stderr]    Compiling easy-shortcuts v0.3.0
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling lapp v0.4.0
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling isatty v0.1.8
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling syn v0.14.2
[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 12.32s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "4ce8b5096e76be607674fb2785824f3f4a0679024ddab66b2365ae0ad7c0057d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ce8b5096e76be607674fb2785824f3f4a0679024ddab66b2365ae0ad7c0057d", kill_on_drop: false }`
[INFO] [stdout] 4ce8b5096e76be607674fb2785824f3f4a0679024ddab66b2365ae0ad7c0057d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49a3d6ed20be8f15a697933a61612e6ba56d412018cd661a2c5b12b4a71fb8f6
[INFO] running `Command { std: "docker" "start" "-a" "49a3d6ed20be8f15a697933a61612e6ba56d412018cd661a2c5b12b4a71fb8f6", 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/regex.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | let re = Regex::new(r"^\d{4}-\d{2}-\d{2}$").unwrap();
[INFO] [stdout]   | ^^^ consider using `const` or `static` instead of `let` for global variables
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[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]   | ^^^ consider using `const` or `static` instead of `let` for global variables
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `runner` (example "regex") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `runner` (example "read") due to 2 previous errors
[INFO] [stdout] error: macro expansion ignores token `{` and any following
[INFO] [stdout]  --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/macros.rs:142:23
[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] [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:8:3
[INFO] [stdout]   |
[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] [stderr] error: could not compile `runner` (example "json") due to 4 previous errors
[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]   | ^^^ consider using `const` or `static` instead of `let` for global variables
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `runner` (example "filetime") due to 2 previous errors
[INFO] [stdout] error: macro expansion ignores token `{` and any following
[INFO] [stdout]  --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/macros.rs:142:23
[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:1:27
[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: 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] [stderr] error: could not compile `runner` (example "hello") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "49a3d6ed20be8f15a697933a61612e6ba56d412018cd661a2c5b12b4a71fb8f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49a3d6ed20be8f15a697933a61612e6ba56d412018cd661a2c5b12b4a71fb8f6", kill_on_drop: false }`
[INFO] [stdout] 49a3d6ed20be8f15a697933a61612e6ba56d412018cd661a2c5b12b4a71fb8f6
[INFO] testing runner-0.5.0 against beta-2023-12-22 for beta-1.76-1
[INFO] extracting crate runner 0.5.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate runner 0.5.0 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "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-5-tc2/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 497a2571d877e48c522fc702aaec08b79256d43a29c78ccdfb4dba681a7db7be
[INFO] running `Command { std: "docker" "start" "-a" "497a2571d877e48c522fc702aaec08b79256d43a29c78ccdfb4dba681a7db7be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "497a2571d877e48c522fc702aaec08b79256d43a29c78ccdfb4dba681a7db7be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "497a2571d877e48c522fc702aaec08b79256d43a29c78ccdfb4dba681a7db7be", kill_on_drop: false }`
[INFO] [stdout] 497a2571d877e48c522fc702aaec08b79256d43a29c78ccdfb4dba681a7db7be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae667e1c931226acfc50657bde1a71ffc3a88eed328a79c7f4dcebe711886ccd
[INFO] running `Command { std: "docker" "start" "-a" "ae667e1c931226acfc50657bde1a71ffc3a88eed328a79c7f4dcebe711886ccd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling libc v0.2.54
[INFO] [stderr]    Compiling serde v1.0.66
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling easy-shortcuts v0.3.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling lapp v0.4.0
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling open v1.2.1
[INFO] [stderr]    Compiling json v0.11.12
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling isatty v0.1.8
[INFO] [stderr]    Compiling syn v0.14.2
[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 14.13s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "ae667e1c931226acfc50657bde1a71ffc3a88eed328a79c7f4dcebe711886ccd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae667e1c931226acfc50657bde1a71ffc3a88eed328a79c7f4dcebe711886ccd", kill_on_drop: false }`
[INFO] [stdout] ae667e1c931226acfc50657bde1a71ffc3a88eed328a79c7f4dcebe711886ccd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a107aa137db5198c3ac27ed4d2060a68345ea469982407ac2647bb381b04fb0
[INFO] running `Command { std: "docker" "start" "-a" "2a107aa137db5198c3ac27ed4d2060a68345ea469982407ac2647bb381b04fb0", 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]   | ^^^ consider using `const` or `static` instead of `let` for global variables
[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]   | ^^^ consider using `const` or `static` instead of `let` for global variables
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `runner` (example "filetime") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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]   | ^^^ consider using `const` or `static` instead of `let` for global variables
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `runner` (example "read") due to 2 previous errors
[INFO] [stderr] error: could not compile `runner` (example "regex") due to 2 previous errors
[INFO] [stdout] error: macro expansion ignores token `{` and any following
[INFO] [stdout]  --> /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/macros.rs:142:23
[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] [stdout] error: macro expansion ignores token `{` and any following
[INFO] [stdout]  --> /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/macros.rs:142:23
[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:1:27
[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: 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[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:8:3
[INFO] [stdout]   |
[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] [stderr] error: could not compile `runner` (example "json") due to 4 previous errors
[INFO] [stderr] error: could not compile `runner` (example "hello") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "2a107aa137db5198c3ac27ed4d2060a68345ea469982407ac2647bb381b04fb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a107aa137db5198c3ac27ed4d2060a68345ea469982407ac2647bb381b04fb0", kill_on_drop: false }`
[INFO] [stdout] 2a107aa137db5198c3ac27ed4d2060a68345ea469982407ac2647bb381b04fb0
