[INFO] cloning repository https://github.com/AllenShi/rust_playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AllenShi/rust_playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAllenShi%2Frust_playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAllenShi%2Frust_playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 24a8f729bf3ff9f478679b27f53960d09d4df205
[INFO] testing AllenShi/rust_playground against master#d98a5da813da67eb189387b8ccfb73cf481275d8+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAllenShi%2Frust_playground" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AllenShi/rust_playground
[INFO] finished tweaking git repo https://github.com/AllenShi/rust_playground
[INFO] tweaked toml for git repo https://github.com/AllenShi/rust_playground written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AllenShi/rust_playground on toolchain d98a5da813da67eb189387b8ccfb73cf481275d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AllenShi/rust_playground 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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d54a927e1e9ccbf2827a1da69b7b075b813f22fc76dddf97d720bd46168c0589
[INFO] running `Command { std: "docker" "start" "-a" "d54a927e1e9ccbf2827a1da69b7b075b813f22fc76dddf97d720bd46168c0589", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d54a927e1e9ccbf2827a1da69b7b075b813f22fc76dddf97d720bd46168c0589", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d54a927e1e9ccbf2827a1da69b7b075b813f22fc76dddf97d720bd46168c0589", kill_on_drop: false }`
[INFO] [stdout] d54a927e1e9ccbf2827a1da69b7b075b813f22fc76dddf97d720bd46168c0589
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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 -Copt-level=3" "-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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec29ada189f7736f6a07bf78ebd0fff62f445f5a07673185491145fd16da238f
[INFO] running `Command { std: "docker" "start" "-a" "ec29ada189f7736f6a07bf78ebd0fff62f445f5a07673185491145fd16da238f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> src/util/conversionexam.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Number {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 3 |     value: i32
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/util/structexam.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `build_user_style_1` and `build_user_style_2` are never used
[INFO] [stdout]   --> src/util/structexam.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl User {
[INFO] [stdout]    | --------- associated functions in this implementation
[INFO] [stdout] 9  |     fn build_user_style_1(email: String, username: String) -> User {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn build_user_style_2(email: String, username: String) -> User {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "ec29ada189f7736f6a07bf78ebd0fff62f445f5a07673185491145fd16da238f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec29ada189f7736f6a07bf78ebd0fff62f445f5a07673185491145fd16da238f", kill_on_drop: false }`
[INFO] [stdout] ec29ada189f7736f6a07bf78ebd0fff62f445f5a07673185491145fd16da238f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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 -Copt-level=3" "-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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 531a56faa43791c7c92f1392c1905a3e756ae9020237c0516e8b762c447ab67d
[INFO] running `Command { std: "docker" "start" "-a" "531a56faa43791c7c92f1392c1905a3e756ae9020237c0516e8b762c447ab67d", kill_on_drop: false }`
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> src/util/conversionexam.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Number {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 3 |     value: i32
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/util/structexam.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `build_user_style_1` and `build_user_style_2` are never used
[INFO] [stdout]   --> src/util/structexam.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl User {
[INFO] [stdout]    | --------- associated functions in this implementation
[INFO] [stdout] 9  |     fn build_user_style_1(email: String, username: String) -> User {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn build_user_style_2(email: String, username: String) -> User {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust_playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `another_value`
[INFO] [stdout]   --> src/util/stringexam.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let another_value = my_value;
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> src/util/conversionexam.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Number {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 3 |     value: i32
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sign_in_count` and `active` are never read
[INFO] [stdout]  --> src/util/structexam.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 4 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 5 |     active: bool
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.31s
[INFO] running `Command { std: "docker" "inspect" "531a56faa43791c7c92f1392c1905a3e756ae9020237c0516e8b762c447ab67d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "531a56faa43791c7c92f1392c1905a3e756ae9020237c0516e8b762c447ab67d", kill_on_drop: false }`
[INFO] [stdout] 531a56faa43791c7c92f1392c1905a3e756ae9020237c0516e8b762c447ab67d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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 -Copt-level=3" "-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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2a4ce412c5d9b3a9561b2977aa9097a97137f3d457bccf00f8820183bbd3689d
[INFO] running `Command { std: "docker" "start" "-a" "2a4ce412c5d9b3a9561b2977aa9097a97137f3d457bccf00f8820183bbd3689d", kill_on_drop: false }`
[INFO] [stderr] warning: field `value` is never read
[INFO] [stderr]  --> src/util/conversionexam.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Number {
[INFO] [stderr]   |            ------ field in this struct
[INFO] [stderr] 3 |     value: i32
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `User` is never constructed
[INFO] [stderr]  --> src/util/structexam.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct User {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated functions `build_user_style_1` and `build_user_style_2` are never used
[INFO] [stderr]   --> src/util/structexam.rs:9:8
[INFO] [stderr]    |
[INFO] [stderr] 8  | impl User {
[INFO] [stderr]    | --------- associated functions in this implementation
[INFO] [stderr] 9  |     fn build_user_style_1(email: String, username: String) -> User {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 18 |     fn build_user_style_2(email: String, username: String) -> User {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_playground` (lib) generated 3 warnings
[INFO] [stderr] warning: unused variable: `another_value`
[INFO] [stderr]   --> src/util/stringexam.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let another_value = my_value;
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_value`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `sign_in_count` and `active` are never read
[INFO] [stderr]  --> src/util/structexam.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct User {
[INFO] [stderr]   |        ---- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 4 |     sign_in_count: u64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 5 |     active: bool
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_playground` (lib test) generated 3 warnings (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_playground-5b911d288e77b69e)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test util::cellexam_test::unit_test_house ... ok
[INFO] [stdout] test util::cellexam_test::compare_owner_and_reference ... ok
[INFO] [stdout] test util::conversionexam_test::unit_test_number ... ok
[INFO] [stdout] test util::stringexam::tests::unit_test_string_assignment ... ok
[INFO] [stdout] test util::structexam::tests::test_build_user_style_2 ... ok
[INFO] [stdout] test util::structexam::tests::test_new_user ... ok
[INFO] [stdout] test util::structexam::tests::test_build_user_style_1 ... ok
[INFO] [stdout] test util::stringexam::tests::unit_test_string_and_str ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_playground-efb3f990a6ee4ea4)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/integration_test.rs (/opt/rustwide/target/debug/deps/integration_test-99257719d61ad340)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test int_test_house_with_cell ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_playground
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2a4ce412c5d9b3a9561b2977aa9097a97137f3d457bccf00f8820183bbd3689d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a4ce412c5d9b3a9561b2977aa9097a97137f3d457bccf00f8820183bbd3689d", kill_on_drop: false }`
[INFO] [stdout] 2a4ce412c5d9b3a9561b2977aa9097a97137f3d457bccf00f8820183bbd3689d
