[INFO] cloning repository https://github.com/hujewelz/rust_by_example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hujewelz/rust_by_example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhujewelz%2Frust_by_example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhujewelz%2Frust_by_example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1bdc070fd576e0d2d53a9168194b92c04bdb5381
[INFO] testing hujewelz/rust_by_example 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%2Fhujewelz%2Frust_by_example" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hujewelz/rust_by_example
[INFO] finished tweaking git repo https://github.com/hujewelz/rust_by_example
[INFO] tweaked toml for git repo https://github.com/hujewelz/rust_by_example written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hujewelz/rust_by_example 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/hujewelz/rust_by_example 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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 2e099c8e6545d578589921ac1dd7e62c5d898a8833b14d7d521abf1212661356
[INFO] running `Command { std: "docker" "start" "-a" "2e099c8e6545d578589921ac1dd7e62c5d898a8833b14d7d521abf1212661356", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e099c8e6545d578589921ac1dd7e62c5d898a8833b14d7d521abf1212661356", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e099c8e6545d578589921ac1dd7e62c5d898a8833b14d7d521abf1212661356", kill_on_drop: false }`
[INFO] [stdout] 2e099c8e6545d578589921ac1dd7e62c5d898a8833b14d7d521abf1212661356
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] f2c1999bc7a96726d743744c011a78f34e8ea9285508b85169e3c98c5ed8a74e
[INFO] running `Command { std: "docker" "start" "-a" "f2c1999bc7a96726d743744c011a78f34e8ea9285508b85169e3c98c5ed8a74e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_by_example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `read_file2` is never used
[INFO] [stdout]   --> src/error_handling.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn read_file2() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `last_char_of_first_line` is never used
[INFO] [stdout]   --> src/error_handling.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn last_char_of_first_line(text: &str) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/format.rs:40:23
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub struct MyType(i32);
[INFO] [stdout]    |                ------ ^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `MyType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "f2c1999bc7a96726d743744c011a78f34e8ea9285508b85169e3c98c5ed8a74e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2c1999bc7a96726d743744c011a78f34e8ea9285508b85169e3c98c5ed8a74e", kill_on_drop: false }`
[INFO] [stdout] f2c1999bc7a96726d743744c011a78f34e8ea9285508b85169e3c98c5ed8a74e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 9bfc7654761301501ed0acc66f78e7ce0fa0eec4d7922cc51b4ace0a0d466819
[INFO] running `Command { std: "docker" "start" "-a" "9bfc7654761301501ed0acc66f78e7ce0fa0eec4d7922cc51b4ace0a0d466819", kill_on_drop: false }`
[INFO] [stdout] warning: function `read_file2` is never used
[INFO] [stdout]   --> src/error_handling.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn read_file2() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `last_char_of_first_line` is never used
[INFO] [stdout]   --> src/error_handling.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn last_char_of_first_line(text: &str) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust_by_example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/format.rs:40:23
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub struct MyType(i32);
[INFO] [stdout]    |                ------ ^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `MyType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_file2` is never used
[INFO] [stdout]   --> src/error_handling.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn read_file2() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `last_char_of_first_line` is never used
[INFO] [stdout]   --> src/error_handling.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn last_char_of_first_line(text: &str) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/format.rs:40:23
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub struct MyType(i32);
[INFO] [stdout]    |                ------ ^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `MyType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "9bfc7654761301501ed0acc66f78e7ce0fa0eec4d7922cc51b4ace0a0d466819", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bfc7654761301501ed0acc66f78e7ce0fa0eec4d7922cc51b4ace0a0d466819", kill_on_drop: false }`
[INFO] [stdout] 9bfc7654761301501ed0acc66f78e7ce0fa0eec4d7922cc51b4ace0a0d466819
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] a58be79eee087a0fdcda8232d302541dd850711739bdea1c624840c6a51857de
[INFO] running `Command { std: "docker" "start" "-a" "a58be79eee087a0fdcda8232d302541dd850711739bdea1c624840c6a51857de", kill_on_drop: false }`
[INFO] [stderr] warning: function `read_file2` is never used
[INFO] [stderr]   --> src/error_handling.rs:37:4
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn read_file2() -> Result<String, io::Error> {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `last_char_of_first_line` is never used
[INFO] [stderr]   --> src/error_handling.rs:55:4
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn last_char_of_first_line(text: &str) -> Option<char> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/format.rs:40:23
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub struct MyType(i32);
[INFO] [stderr]    |                ------ ^^^
[INFO] [stderr]    |                |
[INFO] [stderr]    |                field in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing this field
[INFO] [stderr]    = note: `MyType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_by_example` (lib) generated 3 warnings
[INFO] [stderr] warning: `rust_by_example` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_by_example-88ed351d4fd7f93a)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test cus_types::tests::area_of_rectangle ... ok
[INFO] [stdout] test cus_types::tests::empty_list ... ok
[INFO] [stdout] test cus_types::tests::is_square ... ok
[INFO] [stdout] test cus_types::tests::list_elements ... ok
[INFO] [stdout] test cus_types::tests::list_len ... ok
[INFO] [stdout] test cus_types::tests::height_of_rectangle ... ok
[INFO] [stdout] test cus_types::tests::width_of_rectangle ... ok
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_by_example-b3b5687f0cf9dae4)
[INFO] [stdout] test cus_types::tests::list_with_an_value ... 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] [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]    Doc-tests rust_by_example
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/cus_types.rs - cus_types::Pair (line 66) ... FAILED
[INFO] [stdout] test src/cus_types.rs - cus_types::Number (line 148) ... FAILED
[INFO] [stdout] test src/cus_types.rs - cus_types::Unit (line 51) ... FAILED
[INFO] [stdout] test src/cus_types.rs - cus_types::Pair (line 61) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/cus_types.rs - cus_types::Pair (line 66) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `pair` in this scope
[INFO] [stdout]  --> src/cus_types.rs:67:31
[INFO] [stdout]   |
[INFO] [stdout] 3 | let Pair(interger, decimal) = pair;
[INFO] [stdout]   |                               ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0531]: cannot find tuple struct or tuple variant `Pair` in this scope
[INFO] [stdout]  --> src/cus_types.rs:67:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | let Pair(interger, decimal) = pair;
[INFO] [stdout]   |     ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0531.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/cus_types.rs - cus_types::Number (line 148) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Number`
[INFO] [stdout]  --> src/cus_types.rs:149:24
[INFO] [stdout]   |
[INFO] [stdout] 3 | println!("zero is {}", Number::Zero as i32);
[INFO] [stdout]   |                        ^^^^^^ use of undeclared type `Number`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this enum
[INFO] [stdout]   |
[INFO] [stdout] 2 + use rust_by_example::cus_types::Number;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/cus_types.rs - cus_types::Unit (line 51) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `Unit` in this scope
[INFO] [stdout]  --> src/cus_types.rs:52:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | let _unit = Unit;
[INFO] [stdout]   |             ^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this unit struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use rust_by_example::cus_types::Unit;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/cus_types.rs - cus_types::Pair (line 61) stdout ----
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Pair` in this scope
[INFO] [stdout]  --> src/cus_types.rs:62:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | let pair = Pair(1, 0.1);
[INFO] [stdout]   |            ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/cus_types.rs - cus_types::Number (line 148)
[INFO] [stdout]     src/cus_types.rs - cus_types::Pair (line 61)
[INFO] [stdout]     src/cus_types.rs - cus_types::Pair (line 66)
[INFO] [stdout]     src/cus_types.rs - cus_types::Unit (line 51)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 4 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.26s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "a58be79eee087a0fdcda8232d302541dd850711739bdea1c624840c6a51857de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a58be79eee087a0fdcda8232d302541dd850711739bdea1c624840c6a51857de", kill_on_drop: false }`
[INFO] [stdout] a58be79eee087a0fdcda8232d302541dd850711739bdea1c624840c6a51857de
