[INFO] cloning repository https://github.com/MarkV43/m43lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MarkV43/m43lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMarkV43%2Fm43lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMarkV43%2Fm43lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 309773d0e0bbbed5499f0b1327427e3c19d46c0b
[INFO] checking MarkV43/m43lang against try#901e6d56697c79b2e80df6a487b2318ec6f57ee3 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMarkV43%2Fm43lang" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MarkV43/m43lang on toolchain 901e6d56697c79b2e80df6a487b2318ec6f57ee3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MarkV43/m43lang
[INFO] finished tweaking git repo https://github.com/MarkV43/m43lang
[INFO] tweaked toml for git repo https://github.com/MarkV43/m43lang written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/MarkV43/m43lang 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" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c68366adb60aa1cae919dad5e6135f46d79f01fc5f3702f3fbefd77a609a0db
[INFO] running `Command { std: "docker" "start" "-a" "2c68366adb60aa1cae919dad5e6135f46d79f01fc5f3702f3fbefd77a609a0db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c68366adb60aa1cae919dad5e6135f46d79f01fc5f3702f3fbefd77a609a0db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c68366adb60aa1cae919dad5e6135f46d79f01fc5f3702f3fbefd77a609a0db", kill_on_drop: false }`
[INFO] [stdout] 2c68366adb60aa1cae919dad5e6135f46d79f01fc5f3702f3fbefd77a609a0db
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f57dfe02404dbfbea5c785320b4caab501d004dc4dfae5035ce110a1b889d0f7
[INFO] running `Command { std: "docker" "start" "-a" "f57dfe02404dbfbea5c785320b4caab501d004dc4dfae5035ce110a1b889d0f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling m43lang_derive v0.1.0 (/opt/rustwide/workdir/m43lang_derive)
[INFO] [stderr]     Checking m43lang-visual v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `implementations::*`
[INFO] [stdout]  --> src/logic/structure.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub use implementations::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `implementations::*`
[INFO] [stdout]  --> src/logic/structure.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub use implementations::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return reference to temporary value
[INFO] [stdout]    --> src/logic/structure.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |             &None
[INFO] [stdout]     |             ^----
[INFO] [stdout]     |             ||
[INFO] [stdout]     |             |temporary value created here
[INFO] [stdout]     |             returns a reference to data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return reference to temporary value
[INFO] [stdout]    --> src/logic/structure.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |             &None
[INFO] [stdout]     |             ^----
[INFO] [stdout]     |             ||
[INFO] [stdout]     |             |temporary value created here
[INFO] [stdout]     |             returns a reference to data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `m43lang-visual` (lib test) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `m43lang-visual` (lib) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "f57dfe02404dbfbea5c785320b4caab501d004dc4dfae5035ce110a1b889d0f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f57dfe02404dbfbea5c785320b4caab501d004dc4dfae5035ce110a1b889d0f7", kill_on_drop: false }`
[INFO] [stdout] f57dfe02404dbfbea5c785320b4caab501d004dc4dfae5035ce110a1b889d0f7