[INFO] updating cached repository VitalyAnkh/learn_error_handling [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/VitalyAnkh/learn_error_handling [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/VitalyAnkh/learn_error_handling" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/VitalyAnkh/learn_error_handling"` [INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/VitalyAnkh/learn_error_handling'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/VitalyAnkh/learn_error_handling" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/VitalyAnkh/learn_error_handling"` [INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/VitalyAnkh/learn_error_handling'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] a9cf67b08bbfba5b416953d982e1a8eada6ad2f8 [INFO] sha for GitHub repo VitalyAnkh/learn_error_handling: a9cf67b08bbfba5b416953d982e1a8eada6ad2f8 [INFO] validating manifest of VitalyAnkh/learn_error_handling on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 [INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of VitalyAnkh/learn_error_handling on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b [INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing VitalyAnkh/learn_error_handling [INFO] finished frobbing VitalyAnkh/learn_error_handling [INFO] frobbed toml for VitalyAnkh/learn_error_handling written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/VitalyAnkh/learn_error_handling/Cargo.toml [INFO] started frobbing VitalyAnkh/learn_error_handling [INFO] finished frobbing VitalyAnkh/learn_error_handling [INFO] frobbed toml for VitalyAnkh/learn_error_handling written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/VitalyAnkh/learn_error_handling/Cargo.toml [INFO] crate VitalyAnkh/learn_error_handling already has a lockfile, it will not be regenerated [INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking VitalyAnkh/learn_error_handling against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199 [INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-3/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/VitalyAnkh/learn_error_handling:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] d8d707f312a43bd5d9ce952c4e4d383706107ecff2f9d4e0944e29ee16ba7fef [INFO] running `"docker" "start" "-a" "d8d707f312a43bd5d9ce952c4e4d383706107ecff2f9d4e0944e29ee16ba7fef"` [INFO] [stderr] Checking learn_error_handling v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused imports: `Cons`, `Nil` [INFO] [stderr] --> src/smart_pointer/rc.rs:7:18 [INFO] [stderr] | [INFO] [stderr] 7 | use self::List::{Cons,Nil}; [INFO] [stderr] | ^^^^ ^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_imports)] on by default [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Guess` [INFO] [stderr] --> src/read/mod.rs:5:1 [INFO] [stderr] | [INFO] [stderr] 5 | struct Guess { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/read/mod.rs:10:5 [INFO] [stderr] | [INFO] [stderr] 10 | fn new(value: u32) -> Guess { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum is never used: `List` [INFO] [stderr] --> src/smart_pointer/rc.rs:1:1 [INFO] [stderr] | [INFO] [stderr] 1 | enum List{ [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: comparison is useless due to type limits [INFO] [stderr] --> src/read/mod.rs:11:12 [INFO] [stderr] | [INFO] [stderr] 11 | if value < 0 || value > 100 { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_comparisons)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/smart_pointer/rc.rs:12:9 [INFO] [stderr] | [INFO] [stderr] 12 | let b = Cons(2,Rc::clone(&a)); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_b` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/smart_pointer/ref_cell.rs:4:13 [INFO] [stderr] | [INFO] [stderr] 4 | let mut y =&a; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/smart_pointer/ref_cell.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let mut y =&a; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: field is never used: `value` [INFO] [stderr] --> src/read/mod.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | value: u32 [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: comparison is useless due to type limits [INFO] [stderr] --> src/read/mod.rs:11:12 [INFO] [stderr] | [INFO] [stderr] 11 | if value < 0 || value > 100 { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_comparisons)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> tests/integration_test.rs:11:9 [INFO] [stderr] | [INFO] [stderr] 11 | let y =&a; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `it_add_two` [INFO] [stderr] --> tests/integration_test.rs:5:1 [INFO] [stderr] | [INFO] [stderr] 5 | fn it_add_two(){ [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `check_borrow_rules` [INFO] [stderr] --> tests/integration_test.rs:9:1 [INFO] [stderr] | [INFO] [stderr] 9 | fn check_borrow_rules(){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.64s [INFO] running `"docker" "inspect" "d8d707f312a43bd5d9ce952c4e4d383706107ecff2f9d4e0944e29ee16ba7fef"` [INFO] running `"docker" "rm" "-f" "d8d707f312a43bd5d9ce952c4e4d383706107ecff2f9d4e0944e29ee16ba7fef"` [INFO] [stdout] d8d707f312a43bd5d9ce952c4e4d383706107ecff2f9d4e0944e29ee16ba7fef