[INFO] updating cached repository https://github.com/dmknght/learn_rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }` [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5309399640754188e2dd406dde559f9a80fa87f7 [INFO] testing dmknght/learn_rust against 1.45.2 for beta-1.46-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdmknght%2Flearn_rust" "/workspace/builds/worker-5/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/dmknght/learn_rust on toolchain 1.45.2 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/dmknght/learn_rust [INFO] finished tweaking git repo https://github.com/dmknght/learn_rust [INFO] tweaked toml for git repo https://github.com/dmknght/learn_rust written to /workspace/builds/worker-5/source/Cargo.toml [INFO] crate git repo https://github.com/dmknght/learn_rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c93e184b70e06e53886ff15dfe4dc5ae75e5a2e55b866f40bca2736aa5386100 [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" "c93e184b70e06e53886ff15dfe4dc5ae75e5a2e55b866f40bca2736aa5386100", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c93e184b70e06e53886ff15dfe4dc5ae75e5a2e55b866f40bca2736aa5386100", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c93e184b70e06e53886ff15dfe4dc5ae75e5a2e55b866f40bca2736aa5386100", kill_on_drop: false }` [INFO] [stdout] c93e184b70e06e53886ff15dfe4dc5ae75e5a2e55b866f40bca2736aa5386100 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 89f272b4585b23e2f637da7e30d3295aaf8a562cfa4324f5f4b9fcc154854faf [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" "89f272b4585b23e2f637da7e30d3295aaf8a562cfa4324f5f4b9fcc154854faf", kill_on_drop: false }` [INFO] [stderr] Compiling learn_rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around `while` condition [INFO] [stdout] --> src/main.rs:3:8 [INFO] [stdout] | [INFO] [stdout] 3 | while (x > 0) { [INFO] [stdout] | ^^^^^^^ help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `if` condition [INFO] [stdout] --> src/main.rs:4:6 [INFO] [stdout] | [INFO] [stdout] 4 | if (x % 2 == 0) [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `if` condition [INFO] [stdout] --> src/main.rs:18:6 [INFO] [stdout] | [INFO] [stdout] 18 | if (n % 2 == 0) [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `if` condition [INFO] [stdout] --> src/main.rs:32:5 [INFO] [stdout] | [INFO] [stdout] 32 | if (x % 2 == 0) [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l6_for_loop` [INFO] [stdout] --> src/main.rs:12:4 [INFO] [stdout] | [INFO] [stdout] 12 | fn l6_for_loop() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l5_condition` [INFO] [stdout] --> src/main.rs:26:4 [INFO] [stdout] | [INFO] [stdout] 26 | fn l5_condition() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l4_easy_stdin` [INFO] [stdout] --> src/main.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn l4_easy_stdin() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l3_change_variable_value` [INFO] [stdout] --> src/main.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn l3_change_variable_value() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l2_var_hello_word` [INFO] [stdout] --> src/main.rs:62:4 [INFO] [stdout] | [INFO] [stdout] 62 | fn l2_var_hello_word() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l1_hello_world` [INFO] [stdout] --> src/main.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn l1_hello_world() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:47:2 [INFO] [stdout] | [INFO] [stdout] 47 | reader.read_line(&mut input); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.53s [INFO] [stdout] warning: 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "89f272b4585b23e2f637da7e30d3295aaf8a562cfa4324f5f4b9fcc154854faf", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "89f272b4585b23e2f637da7e30d3295aaf8a562cfa4324f5f4b9fcc154854faf", kill_on_drop: false }` [INFO] [stdout] 89f272b4585b23e2f637da7e30d3295aaf8a562cfa4324f5f4b9fcc154854faf [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 75bca18bd0fbce375f4fbbf8b831e4832b22dc1535388f8eaf5aafe027747464 [INFO] running `Command { std: "docker" "start" "-a" "75bca18bd0fbce375f4fbbf8b831e4832b22dc1535388f8eaf5aafe027747464", kill_on_drop: false }` [INFO] [stderr] Compiling learn_rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around `while` condition [INFO] [stdout] --> src/main.rs:3:8 [INFO] [stdout] | [INFO] [stdout] 3 | while (x > 0) { [INFO] [stdout] | ^^^^^^^ help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `if` condition [INFO] [stdout] --> src/main.rs:4:6 [INFO] [stdout] | [INFO] [stdout] 4 | if (x % 2 == 0) [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `if` condition [INFO] [stdout] --> src/main.rs:18:6 [INFO] [stdout] | [INFO] [stdout] 18 | if (n % 2 == 0) [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `if` condition [INFO] [stdout] --> src/main.rs:32:5 [INFO] [stdout] | [INFO] [stdout] 32 | if (x % 2 == 0) [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l6_for_loop` [INFO] [stdout] --> src/main.rs:12:4 [INFO] [stdout] | [INFO] [stdout] 12 | fn l6_for_loop() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l5_condition` [INFO] [stdout] --> src/main.rs:26:4 [INFO] [stdout] | [INFO] [stdout] 26 | fn l5_condition() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l4_easy_stdin` [INFO] [stdout] --> src/main.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn l4_easy_stdin() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l3_change_variable_value` [INFO] [stdout] --> src/main.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn l3_change_variable_value() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l2_var_hello_word` [INFO] [stdout] --> src/main.rs:62:4 [INFO] [stdout] | [INFO] [stdout] 62 | fn l2_var_hello_word() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `l1_hello_world` [INFO] [stdout] --> src/main.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn l1_hello_world() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:47:2 [INFO] [stdout] | [INFO] [stdout] 47 | reader.read_line(&mut input); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.58s [INFO] running `Command { std: "docker" "inspect" "75bca18bd0fbce375f4fbbf8b831e4832b22dc1535388f8eaf5aafe027747464", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "75bca18bd0fbce375f4fbbf8b831e4832b22dc1535388f8eaf5aafe027747464", kill_on_drop: false }` [INFO] [stdout] 75bca18bd0fbce375f4fbbf8b831e4832b22dc1535388f8eaf5aafe027747464 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 41449c1f88d2a4f41a4a2cbd0b3d09320f484ecb2fb1aae89c60fb377393f09e [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" "41449c1f88d2a4f41a4a2cbd0b3d09320f484ecb2fb1aae89c60fb377393f09e", kill_on_drop: false }` [INFO] [stderr] warning: unnecessary parentheses around `while` condition [INFO] [stderr] --> src/main.rs:3:8 [INFO] [stderr] | [INFO] [stderr] 3 | while (x > 0) { [INFO] [stderr] | ^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:4:6 [INFO] [stderr] | [INFO] [stderr] 4 | if (x % 2 == 0) [INFO] [stderr] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:18:6 [INFO] [stderr] | [INFO] [stderr] 18 | if (n % 2 == 0) [INFO] [stderr] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:32:5 [INFO] [stderr] | [INFO] [stderr] 32 | if (x % 2 == 0) [INFO] [stderr] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: function is never used: `l6_for_loop` [INFO] [stderr] --> src/main.rs:12:4 [INFO] [stderr] | [INFO] [stderr] 12 | fn l6_for_loop() { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `l5_condition` [INFO] [stderr] --> src/main.rs:26:4 [INFO] [stderr] | [INFO] [stderr] 26 | fn l5_condition() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `l4_easy_stdin` [INFO] [stderr] --> src/main.rs:38:4 [INFO] [stderr] | [INFO] [stderr] 38 | fn l4_easy_stdin() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `l3_change_variable_value` [INFO] [stderr] --> src/main.rs:51:4 [INFO] [stderr] | [INFO] [stderr] 51 | fn l3_change_variable_value() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `l2_var_hello_word` [INFO] [stderr] --> src/main.rs:62:4 [INFO] [stderr] | [INFO] [stderr] 62 | fn l2_var_hello_word() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `l1_hello_world` [INFO] [stderr] --> src/main.rs:71:4 [INFO] [stderr] | [INFO] [stderr] 71 | fn l1_hello_world() { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:47:2 [INFO] [stderr] | [INFO] [stderr] 47 | reader.read_line(&mut input); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: 11 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/learn_rust-c17110654e241504 [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 `Command { std: "docker" "inspect" "41449c1f88d2a4f41a4a2cbd0b3d09320f484ecb2fb1aae89c60fb377393f09e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "41449c1f88d2a4f41a4a2cbd0b3d09320f484ecb2fb1aae89c60fb377393f09e", kill_on_drop: false }` [INFO] [stdout] 41449c1f88d2a4f41a4a2cbd0b3d09320f484ecb2fb1aae89c60fb377393f09e