[INFO] cloning repository https://github.com/Hope410/stack-lambda-language
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Hope410/stack-lambda-language" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHope410%2Fstack-lambda-language", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHope410%2Fstack-lambda-language'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0c53d9a5203670133b9fe9c043e5d14da3772f88
[INFO] testing Hope410/stack-lambda-language against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHope410%2Fstack-lambda-language" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Hope410/stack-lambda-language on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Hope410/stack-lambda-language
[INFO] finished tweaking git repo https://github.com/Hope410/stack-lambda-language
[INFO] tweaked toml for git repo https://github.com/Hope410/stack-lambda-language written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Hope410/stack-lambda-language already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", 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] dbfde55a0feac32bf41990146e5c45987d93351e6c7348a1007c7e8e5587bba4
[INFO] running `Command { std: "docker" "start" "-a" "dbfde55a0feac32bf41990146e5c45987d93351e6c7348a1007c7e8e5587bba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbfde55a0feac32bf41990146e5c45987d93351e6c7348a1007c7e8e5587bba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbfde55a0feac32bf41990146e5c45987d93351e6c7348a1007c7e8e5587bba4", kill_on_drop: false }`
[INFO] [stdout] dbfde55a0feac32bf41990146e5c45987d93351e6c7348a1007c7e8e5587bba4
[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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] 32afff545d9dcd2c677e2824fed728d04a4550e75c9e215efe74c910836dc517
[INFO] running `Command { std: "docker" "start" "-a" "32afff545d9dcd2c677e2824fed728d04a4550e75c9e215efe74c910836dc517", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack-lambda-language v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `COMMENT_OP`
[INFO] [stdout]  --> src/syntax/dictionary.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub const COMMENT_OP: &str = "?!";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `GETTER_OP`
[INFO] [stdout]  --> src/syntax/dictionary.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub const GETTER_OP: &str = "::";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Comment`
[INFO] [stdout]  --> src/syntax/tree.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Comment { text: &'a str },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Operation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/syntax/tree.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Call`
[INFO] [stdout]  --> src/syntax/tree.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Call { caller: &'a str, arg: &'a str, body: &'a str }
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Operation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/syntax/tree.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `operation`
[INFO] [stdout]   --> src/syntax/tree.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     operation: Operation<'a>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `TreeNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/syntax/tree.rs:8:10
[INFO] [stdout]    |
[INFO] [stdout] 8  | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chidlren`
[INFO] [stdout]   --> src/syntax/tree.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     chidlren: Vec<TreeNode<'a>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `TreeNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/syntax/tree.rs:8:10
[INFO] [stdout]    |
[INFO] [stdout] 8  | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.44s
[INFO] running `Command { std: "docker" "inspect" "32afff545d9dcd2c677e2824fed728d04a4550e75c9e215efe74c910836dc517", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32afff545d9dcd2c677e2824fed728d04a4550e75c9e215efe74c910836dc517", kill_on_drop: false }`
[INFO] [stdout] 32afff545d9dcd2c677e2824fed728d04a4550e75c9e215efe74c910836dc517
[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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51fce979cd5e4bf92c4242c33bb2bc0a24ff25da9e53ec5f270ecb73a6363a4f
[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" "51fce979cd5e4bf92c4242c33bb2bc0a24ff25da9e53ec5f270ecb73a6363a4f", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack-lambda-language v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `COMMENT_OP`
[INFO] [stdout]  --> src/syntax/dictionary.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub const COMMENT_OP: &str = "?!";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `GETTER_OP`
[INFO] [stdout]  --> src/syntax/dictionary.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub const GETTER_OP: &str = "::";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Comment`
[INFO] [stdout]  --> src/syntax/tree.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Comment { text: &'a str },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Operation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/syntax/tree.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Call`
[INFO] [stdout]  --> src/syntax/tree.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Call { caller: &'a str, arg: &'a str, body: &'a str }
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Operation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/syntax/tree.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `operation`
[INFO] [stdout]   --> src/syntax/tree.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     operation: Operation<'a>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `TreeNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/syntax/tree.rs:8:10
[INFO] [stdout]    |
[INFO] [stdout] 8  | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chidlren`
[INFO] [stdout]   --> src/syntax/tree.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     chidlren: Vec<TreeNode<'a>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `TreeNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/syntax/tree.rs:8:10
[INFO] [stdout]    |
[INFO] [stdout] 8  | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "51fce979cd5e4bf92c4242c33bb2bc0a24ff25da9e53ec5f270ecb73a6363a4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51fce979cd5e4bf92c4242c33bb2bc0a24ff25da9e53ec5f270ecb73a6363a4f", kill_on_drop: false }`
[INFO] [stdout] 51fce979cd5e4bf92c4242c33bb2bc0a24ff25da9e53ec5f270ecb73a6363a4f
[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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", 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] 15b271329d97b221f98c6ee7eaa0a7a70ec49b0090f021bf544f33482e3adffc
[INFO] running `Command { std: "docker" "start" "-a" "15b271329d97b221f98c6ee7eaa0a7a70ec49b0090f021bf544f33482e3adffc", kill_on_drop: false }`
[INFO] [stderr] warning: constant is never used: `COMMENT_OP`
[INFO] [stderr]  --> src/syntax/dictionary.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub const COMMENT_OP: &str = "?!";
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `GETTER_OP`
[INFO] [stderr]  --> src/syntax/dictionary.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub const GETTER_OP: &str = "::";
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Comment`
[INFO] [stderr]  --> src/syntax/tree.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Comment { text: &'a str },
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `Operation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/syntax/tree.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[derive(Debug)]
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Call`
[INFO] [stderr]  --> src/syntax/tree.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Call { caller: &'a str, arg: &'a str, body: &'a str }
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `Operation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/syntax/tree.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[derive(Debug)]
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `operation`
[INFO] [stderr]   --> src/syntax/tree.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     operation: Operation<'a>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `TreeNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/syntax/tree.rs:8:10
[INFO] [stderr]    |
[INFO] [stderr] 8  | #[derive(Debug)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `chidlren`
[INFO] [stderr]   --> src/syntax/tree.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     chidlren: Vec<TreeNode<'a>>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `TreeNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/syntax/tree.rs:8:10
[INFO] [stderr]    |
[INFO] [stderr] 8  | #[derive(Debug)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `stack-lambda-language` (bin "stack-lambda-language" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/stack_lambda_language-8843745c04d49a35)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "15b271329d97b221f98c6ee7eaa0a7a70ec49b0090f021bf544f33482e3adffc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15b271329d97b221f98c6ee7eaa0a7a70ec49b0090f021bf544f33482e3adffc", kill_on_drop: false }`
[INFO] [stdout] 15b271329d97b221f98c6ee7eaa0a7a70ec49b0090f021bf544f33482e3adffc