[INFO] fetching crate extended_matrix 0.2.12...
[INFO] checking extended_matrix-0.2.12 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate extended_matrix 0.2.12 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate extended_matrix 0.2.12 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate extended_matrix 0.2.12
[INFO] finished tweaking crates.io crate extended_matrix 0.2.12
[INFO] tweaked toml for crates.io crate extended_matrix 0.2.12 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate extended_matrix 0.2.12 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8821d5beab67ca35aebf217a5d10f72e89538eb4531b235cdcb41282ec0f198a
[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" "8821d5beab67ca35aebf217a5d10f72e89538eb4531b235cdcb41282ec0f198a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8821d5beab67ca35aebf217a5d10f72e89538eb4531b235cdcb41282ec0f198a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8821d5beab67ca35aebf217a5d10f72e89538eb4531b235cdcb41282ec0f198a", kill_on_drop: false }`
[INFO] [stdout] 8821d5beab67ca35aebf217a5d10f72e89538eb4531b235cdcb41282ec0f198a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96cdc2a15ba6e0e18daf0fdd04b9dbdaccc3e0a3640360ae6477f0f15b5952df
[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" "96cdc2a15ba6e0e18daf0fdd04b9dbdaccc3e0a3640360ae6477f0f15b5952df", kill_on_drop: false }`
[INFO] [stderr]     Checking extended_matrix v0.2.12 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `ref_rows_number`
[INFO] [stdout]    --> src/basic_matrix/non_symmetric_matrix.rs:260:12
[INFO] [stdout]     |
[INFO] [stdout] 260 |     pub fn ref_rows_number(&self) -> &T
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_columns_number`
[INFO] [stdout]    --> src/basic_matrix/non_symmetric_matrix.rs:266:12
[INFO] [stdout]     |
[INFO] [stdout] 266 |     pub fn ref_columns_number(&self) -> &T
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_elements_indexes`
[INFO] [stdout]    --> src/basic_matrix/non_symmetric_matrix.rs:272:12
[INFO] [stdout]     |
[INFO] [stdout] 272 |     pub fn ref_elements_indexes(&self) -> &[T]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_elements_values`
[INFO] [stdout]    --> src/basic_matrix/non_symmetric_matrix.rs:278:12
[INFO] [stdout]     |
[INFO] [stdout] 278 |     pub fn ref_elements_values(&self) -> &[V]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_rows_and_columns_number`
[INFO] [stdout]    --> src/basic_matrix/symmetric_matrix.rs:207:12
[INFO] [stdout]     |
[INFO] [stdout] 207 |     pub fn ref_rows_and_columns_number(&self) -> &T
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_elements_indexes`
[INFO] [stdout]    --> src/basic_matrix/symmetric_matrix.rs:213:12
[INFO] [stdout]     |
[INFO] [stdout] 213 |     pub fn ref_elements_indexes(&self) -> &[T]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_elements_values`
[INFO] [stdout]    --> src/basic_matrix/symmetric_matrix.rs:219:12
[INFO] [stdout]     |
[INFO] [stdout] 219 |     pub fn ref_elements_values(&self) -> &[V]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_symmetric_matrix_struct`
[INFO] [stdout]   --> src/basic_matrix/functions.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn return_symmetric_matrix_struct<T, V>(boxed_struct: Box<dyn BasicMatrixTrait<T, V>>)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_non_symmetric_matrix_struct`
[INFO] [stdout]   --> src/basic_matrix/functions.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn return_non_symmetric_matrix_struct<T, V>(boxed_struct: Box<dyn BasicMatrixTrait<T, V>>)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_rows_number`
[INFO] [stdout]    --> src/basic_matrix/non_symmetric_matrix.rs:260:12
[INFO] [stdout]     |
[INFO] [stdout] 260 |     pub fn ref_rows_number(&self) -> &T
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_columns_number`
[INFO] [stdout]    --> src/basic_matrix/non_symmetric_matrix.rs:266:12
[INFO] [stdout]     |
[INFO] [stdout] 266 |     pub fn ref_columns_number(&self) -> &T
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_elements_indexes`
[INFO] [stdout]    --> src/basic_matrix/non_symmetric_matrix.rs:272:12
[INFO] [stdout]     |
[INFO] [stdout] 272 |     pub fn ref_elements_indexes(&self) -> &[T]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_elements_values`
[INFO] [stdout]    --> src/basic_matrix/non_symmetric_matrix.rs:278:12
[INFO] [stdout]     |
[INFO] [stdout] 278 |     pub fn ref_elements_values(&self) -> &[V]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_rows_and_columns_number`
[INFO] [stdout]    --> src/basic_matrix/symmetric_matrix.rs:207:12
[INFO] [stdout]     |
[INFO] [stdout] 207 |     pub fn ref_rows_and_columns_number(&self) -> &T
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_elements_indexes`
[INFO] [stdout]    --> src/basic_matrix/symmetric_matrix.rs:213:12
[INFO] [stdout]     |
[INFO] [stdout] 213 |     pub fn ref_elements_indexes(&self) -> &[T]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ref_elements_values`
[INFO] [stdout]    --> src/basic_matrix/symmetric_matrix.rs:219:12
[INFO] [stdout]     |
[INFO] [stdout] 219 |     pub fn ref_elements_values(&self) -> &[V]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_symmetric_matrix_struct`
[INFO] [stdout]   --> src/basic_matrix/functions.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn return_symmetric_matrix_struct<T, V>(boxed_struct: Box<dyn BasicMatrixTrait<T, V>>)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_non_symmetric_matrix_struct`
[INFO] [stdout]   --> src/basic_matrix/functions.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn return_non_symmetric_matrix_struct<T, V>(boxed_struct: Box<dyn BasicMatrixTrait<T, V>>)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "96cdc2a15ba6e0e18daf0fdd04b9dbdaccc3e0a3640360ae6477f0f15b5952df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96cdc2a15ba6e0e18daf0fdd04b9dbdaccc3e0a3640360ae6477f0f15b5952df", kill_on_drop: false }`
[INFO] [stdout] 96cdc2a15ba6e0e18daf0fdd04b9dbdaccc3e0a3640360ae6477f0f15b5952df