[INFO] cloning repository https://github.com/Cr0a3/compiler-template
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Cr0a3/compiler-template" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCr0a3%2Fcompiler-template", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCr0a3%2Fcompiler-template'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 93286e6ffb60a8fed9e5cde7ed0ba5a7e3706e68
[INFO] checking Cr0a3/compiler-template against master#3f6250a7bb79e600d9036bbc7c8f65af43933643 for pr-147859
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCr0a3%2Fcompiler-template" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Cr0a3/compiler-template
[INFO] finished tweaking git repo https://github.com/Cr0a3/compiler-template
[INFO] tweaked toml for git repo https://github.com/Cr0a3/compiler-template written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Cr0a3/compiler-template on toolchain 3f6250a7bb79e600d9036bbc7c8f65af43933643
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3f6250a7bb79e600d9036bbc7c8f65af43933643" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Cr0a3/compiler-template 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" "+3f6250a7bb79e600d9036bbc7c8f65af43933643" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+3f6250a7bb79e600d9036bbc7c8f65af43933643" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b047b32907c1fb6e5f4ae49debc74e0dd67315940d96e088dcca56b9918794b1
[INFO] running `Command { std: "docker" "start" "-a" "b047b32907c1fb6e5f4ae49debc74e0dd67315940d96e088dcca56b9918794b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b047b32907c1fb6e5f4ae49debc74e0dd67315940d96e088dcca56b9918794b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b047b32907c1fb6e5f4ae49debc74e0dd67315940d96e088dcca56b9918794b1", kill_on_drop: false }`
[INFO] [stdout] b047b32907c1fb6e5f4ae49debc74e0dd67315940d96e088dcca56b9918794b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+3f6250a7bb79e600d9036bbc7c8f65af43933643" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 742ef74075e23d02161f0e89b9ae8f3b3594e5dd084ad3e19357131f2c78b9f3
[INFO] running `Command { std: "docker" "start" "-a" "742ef74075e23d02161f0e89b9ae8f3b3594e5dd084ad3e19357131f2c78b9f3", kill_on_drop: false }`
[INFO] [stderr]     Checking compiler-template v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the trait bound `!: Backend` is not satisfied
[INFO] [stdout]   --> src/options.rs:36:30
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn backend(&self) -> impl Backend {
[INFO] [stdout]    |                              ^^^^^^^^^^^^ the trait `Backend` is not implemented for `!`
[INFO] [stdout] 37 |         todo!()
[INFO] [stdout]    |         ------- return type was inferred to be `!` here
[INFO] [stdout]    |
[INFO] [stdout] help: this trait has no implementations, consider adding one
[INFO] [stdout]   --> src/codegen/mod.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub trait Backend: Sized {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `!: Backend` is not satisfied
[INFO] [stdout]   --> src/options.rs:36:30
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn backend(&self) -> impl Backend {
[INFO] [stdout]    |                              ^^^^^^^^^^^^ the trait `Backend` is not implemented for `!`
[INFO] [stdout] 37 |         todo!()
[INFO] [stdout]    |         ------- return type was inferred to be `!` here
[INFO] [stdout]    |
[INFO] [stdout] help: this trait has no implementations, consider adding one
[INFO] [stdout]   --> src/codegen/mod.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub trait Backend: Sized {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `backend`
[INFO] [stdout]   --> src/codegen/mod.rs:42:27
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn run(&mut self, backend: &mut impl Backend) {
[INFO] [stdout]    |                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_backend`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `backend`
[INFO] [stdout]   --> src/codegen/mod.rs:42:27
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn run(&mut self, backend: &mut impl Backend) {
[INFO] [stdout]    |                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_backend`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tok`
[INFO] [stdout]   --> src/parser/mod.rs:40:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |         while let Some(tok) = self.advance()
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_tok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tok`
[INFO] [stdout]   --> src/parser/mod.rs:40:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |         while let Some(tok) = self.advance()
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_tok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `compiler-template` (bin "compiler-template") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `compiler-template` (bin "compiler-template" test) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "742ef74075e23d02161f0e89b9ae8f3b3594e5dd084ad3e19357131f2c78b9f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "742ef74075e23d02161f0e89b9ae8f3b3594e5dd084ad3e19357131f2c78b9f3", kill_on_drop: false }`
[INFO] [stdout] 742ef74075e23d02161f0e89b9ae8f3b3594e5dd084ad3e19357131f2c78b9f3
