[INFO] cloning repository https://github.com/DFranklin93/data_structures
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DFranklin93/data_structures" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDFranklin93%2Fdata_structures", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDFranklin93%2Fdata_structures'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 548df2243a5cf44aaae624904ab37d608514f5c4
[INFO] checking DFranklin93/data_structures against try#ddcf048784667508cd676fef4667f88ae15628a3 for pr-148271
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDFranklin93%2Fdata_structures" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/DFranklin93/data_structures
[INFO] finished tweaking git repo https://github.com/DFranklin93/data_structures
[INFO] tweaked toml for git repo https://github.com/DFranklin93/data_structures written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/DFranklin93/data_structures on toolchain ddcf048784667508cd676fef4667f88ae15628a3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/DFranklin93/data_structures 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" "+ddcf048784667508cd676fef4667f88ae15628a3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02301ad816f21ea476f5cc85ca65c969961dd8ba3ef72d335a10fdd44a3ef09c
[INFO] running `Command { std: "docker" "start" "-a" "02301ad816f21ea476f5cc85ca65c969961dd8ba3ef72d335a10fdd44a3ef09c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02301ad816f21ea476f5cc85ca65c969961dd8ba3ef72d335a10fdd44a3ef09c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02301ad816f21ea476f5cc85ca65c969961dd8ba3ef72d335a10fdd44a3ef09c", kill_on_drop: false }`
[INFO] [stdout] 02301ad816f21ea476f5cc85ca65c969961dd8ba3ef72d335a10fdd44a3ef09c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2d656924e4dd6362cd1d8ebecf2b301474b2ce9e64e0d86acd19bf299c666cb
[INFO] running `Command { std: "docker" "start" "-a" "f2d656924e4dd6362cd1d8ebecf2b301474b2ce9e64e0d86acd19bf299c666cb", kill_on_drop: false }`
[INFO] [stderr]     Checking data_structures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0583]: file not found for module `practice`
[INFO] [stdout]  --> src/binary_search_tree/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `practice`, create file "src/binary_search_tree/practice.rs" or "src/binary_search_tree/practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `practice`
[INFO] [stdout]  --> src/hash_map/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `practice`, create file "src/hash_map/practice.rs" or "src/hash_map/practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `practice`
[INFO] [stdout]  --> src/heap/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `practice`, create file "src/heap/practice.rs" or "src/heap/practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `practice`
[INFO] [stdout]  --> src/queue/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `practice`, create file "src/queue/practice.rs" or "src/queue/practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `singly_linked_list_practice`
[INFO] [stdout]  --> src/singly_linked_list/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod singly_linked_list_practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `singly_linked_list_practice`, create file "src/singly_linked_list/singly_linked_list_practice.rs" or "src/singly_linked_list/singly_linked_list_practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod singly_linked_list_practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `practice`
[INFO] [stdout]  --> src/stack/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `practice`, create file "src/stack/practice.rs" or "src/stack/practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `practice`
[INFO] [stdout]  --> src/binary_search_tree/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `practice`, create file "src/binary_search_tree/practice.rs" or "src/binary_search_tree/practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `practice`
[INFO] [stdout]  --> src/hash_map/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `practice`, create file "src/hash_map/practice.rs" or "src/hash_map/practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `practice`
[INFO] [stdout]  --> src/heap/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `practice`, create file "src/heap/practice.rs" or "src/heap/practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `practice`
[INFO] [stdout]  --> src/queue/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `practice`, create file "src/queue/practice.rs" or "src/queue/practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `singly_linked_list_practice`
[INFO] [stdout]  --> src/singly_linked_list/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod singly_linked_list_practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `singly_linked_list_practice`, create file "src/singly_linked_list/singly_linked_list_practice.rs" or "src/singly_linked_list/singly_linked_list_practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod singly_linked_list_practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `practice`
[INFO] [stdout]  --> src/stack/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod practice;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `practice`, create file "src/stack/practice.rs" or "src/stack/practice/mod.rs"
[INFO] [stdout]   = note: if there is a `mod practice` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old_elem`
[INFO] [stdout]    --> src/binary_search_tree/interview.rs:172:29
[INFO] [stdout]     |
[INFO] [stdout] 172 |                         let old_elem = std::mem::replace(&mut node.elem, successor);
[INFO] [stdout]     |                             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_elem`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0583`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old_elem`
[INFO] [stdout]    --> src/binary_search_tree/interview.rs:172:29
[INFO] [stdout]     |
[INFO] [stdout] 172 |                         let old_elem = std::mem::replace(&mut node.elem, successor);
[INFO] [stdout]     |                             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_elem`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `data_structures` (lib) due to 6 previous errors; 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 E0583`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `data_structures` (lib test) due to 6 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "f2d656924e4dd6362cd1d8ebecf2b301474b2ce9e64e0d86acd19bf299c666cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2d656924e4dd6362cd1d8ebecf2b301474b2ce9e64e0d86acd19bf299c666cb", kill_on_drop: false }`
[INFO] [stdout] f2d656924e4dd6362cd1d8ebecf2b301474b2ce9e64e0d86acd19bf299c666cb
