[INFO] cloning repository https://github.com/VitalyAnkh/learn_error_handling [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VitalyAnkh/learn_error_handling" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVitalyAnkh%2Flearn_error_handling"` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVitalyAnkh%2Flearn_error_handling'... [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] a9cf67b08bbfba5b416953d982e1a8eada6ad2f8 [INFO] testing VitalyAnkh/learn_error_handling against beta-2020-06-03 for beta-1.45-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVitalyAnkh%2Flearn_error_handling" "/workspace/builds/worker-0/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/VitalyAnkh/learn_error_handling on toolchain beta-2020-06-03 [INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/VitalyAnkh/learn_error_handling [INFO] finished tweaking git repo https://github.com/VitalyAnkh/learn_error_handling [INFO] tweaked toml for git repo https://github.com/VitalyAnkh/learn_error_handling written to /workspace/builds/worker-0/source/Cargo.toml [INFO] crate git repo https://github.com/VitalyAnkh/learn_error_handling already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 8ac23b9bebd9dc9245ef0763c96a616ee8c03b5ecc017c501d46920ad98c2a66 [INFO] running `"docker" "start" "-a" "8ac23b9bebd9dc9245ef0763c96a616ee8c03b5ecc017c501d46920ad98c2a66"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling learn_error_handling v0.1.0 (/opt/rustwide/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:5:8 [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: associated function is never used: `new` [INFO] [stderr] --> src/read/mod.rs:10:8 [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:1:6 [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: 5 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.93s [INFO] running `"docker" "inspect" "8ac23b9bebd9dc9245ef0763c96a616ee8c03b5ecc017c501d46920ad98c2a66"` [INFO] running `"docker" "rm" "-f" "8ac23b9bebd9dc9245ef0763c96a616ee8c03b5ecc017c501d46920ad98c2a66"` [INFO] [stdout] 8ac23b9bebd9dc9245ef0763c96a616ee8c03b5ecc017c501d46920ad98c2a66 [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 1493702499c3d70c7c9c9a7b19ef7e04167275252396741178794bbc984b867e [INFO] running `"docker" "start" "-a" "1493702499c3d70c7c9c9a7b19ef7e04167275252396741178794bbc984b867e"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling learn_error_handling v0.1.0 (/opt/rustwide/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:5:8 [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: associated function is never used: `new` [INFO] [stderr] --> src/read/mod.rs:10:8 [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:1:6 [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: 5 warnings emitted [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: if this is intentional, prefix it 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:5:4 [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:9:4 [INFO] [stderr] | [INFO] [stderr] 9 | fn check_borrow_rules(){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [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: if this is intentional, prefix it 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:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let mut y =&a; [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it 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 read: `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: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: 5 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.28s [INFO] running `"docker" "inspect" "1493702499c3d70c7c9c9a7b19ef7e04167275252396741178794bbc984b867e"` [INFO] running `"docker" "rm" "-f" "1493702499c3d70c7c9c9a7b19ef7e04167275252396741178794bbc984b867e"` [INFO] [stdout] 1493702499c3d70c7c9c9a7b19ef7e04167275252396741178794bbc984b867e [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 5ade8bc9033df0c489a163c79ebcbb3339a4ea9b78285a44e4ae466de53c3c79 [INFO] running `"docker" "start" "-a" "5ade8bc9033df0c489a163c79ebcbb3339a4ea9b78285a44e4ae466de53c3c79"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [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:5:8 [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: associated function is never used: `new` [INFO] [stderr] --> src/read/mod.rs:10:8 [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:1:6 [INFO] [stderr] | [INFO] [stderr] 1 | enum List{ [INFO] [stderr] | ^^^^ [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: if this is intentional, prefix it with an underscore: `_b` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` 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: 5 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/smart_pointer/ref_cell.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let mut y =&a; [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it 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 read: `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: 5 warnings emitted [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: if this is intentional, prefix it 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:5:4 [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:9:4 [INFO] [stderr] | [INFO] [stderr] 9 | fn check_borrow_rules(){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/learn_error_handling-5d0ae66037578165 [INFO] [stdout] [INFO] [stdout] running 3 tests [INFO] [stdout] test smart_pointer::ref_cell::check_borrow_rules ... ok [INFO] [stdout] test smart_pointer::rc::test_rc ... ok [INFO] [stderr] Running /opt/rustwide/target/debug/deps/learn_error_handling-976678ec0ae961cc [INFO] [stderr] Running /opt/rustwide/target/debug/deps/integration_test-2c0e97f1440fd41d [INFO] [stdout] test read::tests::greater_than_100 ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [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 [INFO] [stdout] [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 [INFO] [stdout] [INFO] [stderr] Doc-tests learn_error_handling [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 [INFO] [stdout] [INFO] running `"docker" "inspect" "5ade8bc9033df0c489a163c79ebcbb3339a4ea9b78285a44e4ae466de53c3c79"` [INFO] running `"docker" "rm" "-f" "5ade8bc9033df0c489a163c79ebcbb3339a4ea9b78285a44e4ae466de53c3c79"` [INFO] [stdout] 5ade8bc9033df0c489a163c79ebcbb3339a4ea9b78285a44e4ae466de53c3c79