[INFO] fetching crate c-arrow 0.1.4...
[INFO] testing c-arrow-0.1.4 against 1.76.0 for beta-1.77-1
[INFO] extracting crate c-arrow 0.1.4 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate c-arrow 0.1.4 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate c-arrow 0.1.4
[INFO] finished tweaking crates.io crate c-arrow 0.1.4
[INFO] tweaked toml for crates.io crate c-arrow 0.1.4 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2537d93f1045961282ec178d3ffa05a11aa2c837f77a43449d0cbd018e931acf
[INFO] running `Command { std: "docker" "start" "-a" "2537d93f1045961282ec178d3ffa05a11aa2c837f77a43449d0cbd018e931acf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2537d93f1045961282ec178d3ffa05a11aa2c837f77a43449d0cbd018e931acf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2537d93f1045961282ec178d3ffa05a11aa2c837f77a43449d0cbd018e931acf", kill_on_drop: false }`
[INFO] [stdout] 2537d93f1045961282ec178d3ffa05a11aa2c837f77a43449d0cbd018e931acf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2b135c42eccb320463d7fd517f3a82ad5fbbf5ec6d34db67d6d40f5077a2e2e
[INFO] running `Command { std: "docker" "start" "-a" "e2b135c42eccb320463d7fd517f3a82ad5fbbf5ec6d34db67d6d40f5077a2e2e", kill_on_drop: false }`
[INFO] [stderr]    Compiling c-arrow v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] running `Command { std: "docker" "inspect" "e2b135c42eccb320463d7fd517f3a82ad5fbbf5ec6d34db67d6d40f5077a2e2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2b135c42eccb320463d7fd517f3a82ad5fbbf5ec6d34db67d6d40f5077a2e2e", kill_on_drop: false }`
[INFO] [stdout] e2b135c42eccb320463d7fd517f3a82ad5fbbf5ec6d34db67d6d40f5077a2e2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.76.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98b063ffb45d3e9c9b0aeaeb185fe2c7bb6f5692740dce42cd6256b7d839ee27
[INFO] running `Command { std: "docker" "start" "-a" "98b063ffb45d3e9c9b0aeaeb185fe2c7bb6f5692740dce42cd6256b7d839ee27", kill_on_drop: false }`
[INFO] [stderr]    Compiling c-arrow v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "98b063ffb45d3e9c9b0aeaeb185fe2c7bb6f5692740dce42cd6256b7d839ee27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98b063ffb45d3e9c9b0aeaeb185fe2c7bb6f5692740dce42cd6256b7d839ee27", kill_on_drop: false }`
[INFO] [stdout] 98b063ffb45d3e9c9b0aeaeb185fe2c7bb6f5692740dce42cd6256b7d839ee27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.76.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d6175484de4564d3dfe188911092f60605ef41e1cd535731d211373a3a18695d
[INFO] running `Command { std: "docker" "start" "-a" "d6175484de4564d3dfe188911092f60605ef41e1cd535731d211373a3a18695d", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/c_arrow-c8f66a9c5cb85142)
[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] [stderr]    Doc-tests c-arrow
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 26) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 26) stdout ----
[INFO] [stdout] error[E0412]: cannot find type `Stack` in this scope
[INFO] [stdout]  --> src/lib.rs:28:16
[INFO] [stdout]   |
[INFO] [stdout] 5 | let mut stack: Stack<char> = Stack::new();
[INFO] [stdout]   |                ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Stack`
[INFO] [stdout]  --> src/lib.rs:28:30
[INFO] [stdout]   |
[INFO] [stdout] 5 | let mut stack: Stack<char> = Stack::new();
[INFO] [stdout]   |                              ^^^^^ use of undeclared type `Stack`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `back_of` in this scope
[INFO] [stdout]   --> src/lib.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pt![back_of(top_back)->back->data = 'x'];
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 26)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "d6175484de4564d3dfe188911092f60605ef41e1cd535731d211373a3a18695d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6175484de4564d3dfe188911092f60605ef41e1cd535731d211373a3a18695d", kill_on_drop: false }`
[INFO] [stdout] d6175484de4564d3dfe188911092f60605ef41e1cd535731d211373a3a18695d
[INFO] testing c-arrow-0.1.4 against beta-2024-02-10 for beta-1.77-1
[INFO] extracting crate c-arrow 0.1.4 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate c-arrow 0.1.4 on toolchain beta-2024-02-10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate c-arrow 0.1.4
[INFO] finished tweaking crates.io crate c-arrow 0.1.4
[INFO] tweaked toml for crates.io crate c-arrow 0.1.4 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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-2024-02-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70fc894368f971edafcd1fda5fb4d7ba21c1f5874c642c701314a41a1838200b
[INFO] running `Command { std: "docker" "start" "-a" "70fc894368f971edafcd1fda5fb4d7ba21c1f5874c642c701314a41a1838200b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70fc894368f971edafcd1fda5fb4d7ba21c1f5874c642c701314a41a1838200b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70fc894368f971edafcd1fda5fb4d7ba21c1f5874c642c701314a41a1838200b", kill_on_drop: false }`
[INFO] [stdout] 70fc894368f971edafcd1fda5fb4d7ba21c1f5874c642c701314a41a1838200b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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-2024-02-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7213ec97c6f657abb621ce9a43ce0a7ca687c0ffb32e71d8a5186054d90b8ae2
[INFO] running `Command { std: "docker" "start" "-a" "7213ec97c6f657abb621ce9a43ce0a7ca687c0ffb32e71d8a5186054d90b8ae2", kill_on_drop: false }`
[INFO] [stderr]    Compiling c-arrow v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] running `Command { std: "docker" "inspect" "7213ec97c6f657abb621ce9a43ce0a7ca687c0ffb32e71d8a5186054d90b8ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7213ec97c6f657abb621ce9a43ce0a7ca687c0ffb32e71d8a5186054d90b8ae2", kill_on_drop: false }`
[INFO] [stdout] 7213ec97c6f657abb621ce9a43ce0a7ca687c0ffb32e71d8a5186054d90b8ae2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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-2024-02-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4a58dda2705c3f68a19fcc616f01cbbcf5f32bd14ee6b6a8a9824025595f27b
[INFO] running `Command { std: "docker" "start" "-a" "d4a58dda2705c3f68a19fcc616f01cbbcf5f32bd14ee6b6a8a9824025595f27b", kill_on_drop: false }`
[INFO] [stderr]    Compiling c-arrow v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "d4a58dda2705c3f68a19fcc616f01cbbcf5f32bd14ee6b6a8a9824025595f27b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4a58dda2705c3f68a19fcc616f01cbbcf5f32bd14ee6b6a8a9824025595f27b", kill_on_drop: false }`
[INFO] [stdout] d4a58dda2705c3f68a19fcc616f01cbbcf5f32bd14ee6b6a8a9824025595f27b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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-2024-02-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e77cc14d926a948f86bf92de0d00eaf998b712f591300d539246ff6926aac74f
[INFO] running `Command { std: "docker" "start" "-a" "e77cc14d926a948f86bf92de0d00eaf998b712f591300d539246ff6926aac74f", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/c_arrow-ee43bce6cd9d11fb)
[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] [stderr]    Doc-tests c-arrow
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 26) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 26) stdout ----
[INFO] [stdout] error[E0412]: cannot find type `Stack` in this scope
[INFO] [stdout]  --> src/lib.rs:28:16
[INFO] [stdout]   |
[INFO] [stdout] 5 | let mut stack: Stack<char> = Stack::new();
[INFO] [stdout]   |                ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Stack`
[INFO] [stdout]  --> src/lib.rs:28:30
[INFO] [stdout]   |
[INFO] [stdout] 5 | let mut stack: Stack<char> = Stack::new();
[INFO] [stdout]   |                              ^^^^^ use of undeclared type `Stack`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `back_of` in this scope
[INFO] [stdout]   --> src/lib.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pt![back_of(top_back)->back->data = 'x'];
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 26)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "e77cc14d926a948f86bf92de0d00eaf998b712f591300d539246ff6926aac74f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e77cc14d926a948f86bf92de0d00eaf998b712f591300d539246ff6926aac74f", kill_on_drop: false }`
[INFO] [stdout] e77cc14d926a948f86bf92de0d00eaf998b712f591300d539246ff6926aac74f
