[INFO] fetching crate serbo-mc 0.1.0...
[INFO] testing serbo-mc-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate serbo-mc 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate serbo-mc 0.1.0
[INFO] finished tweaking crates.io crate serbo-mc 0.1.0
[INFO] tweaked toml for crates.io crate serbo-mc 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serbo-mc 0.1.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 542edf090c3afb6d9cee488498e9130b4040586104a77ce1d7ca55af5e18ad96
[INFO] running `Command { std: "docker" "start" "-a" "542edf090c3afb6d9cee488498e9130b4040586104a77ce1d7ca55af5e18ad96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "542edf090c3afb6d9cee488498e9130b4040586104a77ce1d7ca55af5e18ad96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "542edf090c3afb6d9cee488498e9130b4040586104a77ce1d7ca55af5e18ad96", kill_on_drop: false }`
[INFO] [stdout] 542edf090c3afb6d9cee488498e9130b4040586104a77ce1d7ca55af5e18ad96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09846e04ec8746581b5693bc99389059703757ab3709fda617d42a1529bef3f1
[INFO] running `Command { std: "docker" "start" "-a" "09846e04ec8746581b5693bc99389059703757ab3709fda617d42a1529bef3f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling copy_dir v0.1.3
[INFO] [stderr]    Compiling serbo-mc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:284:11
[INFO] [stdout]     |
[INFO] [stdout] 284 |           writeln!(writer, "{}", x);
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 284 |           let _ = writeln!(writer, "{}", x);
[INFO] [stdout]     |           +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:285:11
[INFO] [stdout]     |
[INFO] [stdout] 285 |           writer.flush();
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 285 |           let _ = writer.flush();
[INFO] [stdout]     |           +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:293:5
[INFO] [stdout]     |
[INFO] [stdout] 293 |     &self.servers.insert(id.to_string(), serv_inst);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 293 |     let _ = &self.servers.insert(id.to_string(), serv_inst);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:303:7
[INFO] [stdout]     |
[INFO] [stdout] 303 |       inst.stdout_join.take().unwrap().join();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 303 |       let _ = inst.stdout_join.take().unwrap().join();
[INFO] [stdout]     |       +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:304:7
[INFO] [stdout]     |
[INFO] [stdout] 304 |       inst.stdin_join.take().unwrap().join();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 304 |       let _ = inst.stdin_join.take().unwrap().join();
[INFO] [stdout]     |       +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `Command { std: "docker" "inspect" "09846e04ec8746581b5693bc99389059703757ab3709fda617d42a1529bef3f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09846e04ec8746581b5693bc99389059703757ab3709fda617d42a1529bef3f1", kill_on_drop: false }`
[INFO] [stdout] 09846e04ec8746581b5693bc99389059703757ab3709fda617d42a1529bef3f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bcbd9064871ea4e7edb4dd6bb57a88d774725c06d63bc9a1372072836d63211a
[INFO] running `Command { std: "docker" "start" "-a" "bcbd9064871ea4e7edb4dd6bb57a88d774725c06d63bc9a1372072836d63211a", kill_on_drop: false }`
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:284:11
[INFO] [stdout]     |
[INFO] [stdout] 284 |           writeln!(writer, "{}", x);
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 284 |           let _ = writeln!(writer, "{}", x);
[INFO] [stdout]     |           +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:285:11
[INFO] [stdout]     |
[INFO] [stdout] 285 |           writer.flush();
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 285 |           let _ = writer.flush();
[INFO] [stdout]     |           +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:293:5
[INFO] [stdout]     |
[INFO] [stdout] 293 |     &self.servers.insert(id.to_string(), serv_inst);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 293 |     let _ = &self.servers.insert(id.to_string(), serv_inst);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:303:7
[INFO] [stdout]     |
[INFO] [stdout] 303 |       inst.stdout_join.take().unwrap().join();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 303 |       let _ = inst.stdout_join.take().unwrap().join();
[INFO] [stdout]     |       +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:304:7
[INFO] [stdout]     |
[INFO] [stdout] 304 |       inst.stdin_join.take().unwrap().join();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 304 |       let _ = inst.stdin_join.take().unwrap().join();
[INFO] [stdout]     |       +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serbo-mc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:284:11
[INFO] [stdout]     |
[INFO] [stdout] 284 |           writeln!(writer, "{}", x);
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 284 |           let _ = writeln!(writer, "{}", x);
[INFO] [stdout]     |           +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:285:11
[INFO] [stdout]     |
[INFO] [stdout] 285 |           writer.flush();
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 285 |           let _ = writer.flush();
[INFO] [stdout]     |           +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:293:5
[INFO] [stdout]     |
[INFO] [stdout] 293 |     &self.servers.insert(id.to_string(), serv_inst);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 293 |     let _ = &self.servers.insert(id.to_string(), serv_inst);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:303:7
[INFO] [stdout]     |
[INFO] [stdout] 303 |       inst.stdout_join.take().unwrap().join();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 303 |       let _ = inst.stdout_join.take().unwrap().join();
[INFO] [stdout]     |       +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:304:7
[INFO] [stdout]     |
[INFO] [stdout] 304 |       inst.stdin_join.take().unwrap().join();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 304 |       let _ = inst.stdin_join.take().unwrap().join();
[INFO] [stdout]     |       +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "bcbd9064871ea4e7edb4dd6bb57a88d774725c06d63bc9a1372072836d63211a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcbd9064871ea4e7edb4dd6bb57a88d774725c06d63bc9a1372072836d63211a", kill_on_drop: false }`
[INFO] [stdout] bcbd9064871ea4e7edb4dd6bb57a88d774725c06d63bc9a1372072836d63211a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0501c516bf57e1ef99c9f992949e6741a1f829728cffede404c358162955b1e9
[INFO] running `Command { std: "docker" "start" "-a" "0501c516bf57e1ef99c9f992949e6741a1f829728cffede404c358162955b1e9", kill_on_drop: false }`
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:284:11
[INFO] [stderr]     |
[INFO] [stderr] 284 |           writeln!(writer, "{}", x);
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 284 |           let _ = writeln!(writer, "{}", x);
[INFO] [stderr]     |           +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:285:11
[INFO] [stderr]     |
[INFO] [stderr] 285 |           writer.flush();
[INFO] [stderr]     |           ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 285 |           let _ = writer.flush();
[INFO] [stderr]     |           +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/lib.rs:293:5
[INFO] [stderr]     |
[INFO] [stderr] 293 |     &self.servers.insert(id.to_string(), serv_inst);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 293 |     let _ = &self.servers.insert(id.to_string(), serv_inst);
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:303:7
[INFO] [stderr]     |
[INFO] [stderr] 303 |       inst.stdout_join.take().unwrap().join();
[INFO] [stderr]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 303 |       let _ = inst.stdout_join.take().unwrap().join();
[INFO] [stderr]     |       +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:304:7
[INFO] [stderr]     |
[INFO] [stderr] 304 |       inst.stdin_join.take().unwrap().join();
[INFO] [stderr]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 304 |       let _ = inst.stdin_join.take().unwrap().join();
[INFO] [stderr]     |       +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `serbo-mc` (lib) generated 5 warnings
[INFO] [stderr] warning: `serbo-mc` (lib test) generated 5 warnings (5 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/serbo-f33b4d3663861926)
[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 serbo
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/lib.rs - (line 4) ... FAILED
[INFO] [stdout] test src/lib.rs - Manager::create (line 182) ... FAILED
[INFO] [stdout] test src/lib.rs - Manager::new (line 163) ... FAILED
[INFO] [stdout] test src/lib.rs - Manager::get (line 201) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 4) stdout ----
[INFO] [stdout] error[E0254]: the name `serbo` is defined multiple times
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate r#serbo;
[INFO] [stdout]   | --------------------- previous import of the extern crate `serbo` here
[INFO] [stdout] 6 | use serbo;
[INFO] [stdout]   |     ^^^^^ `serbo` reimported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `serbo` must be defined only once in the type namespace of this module
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0254`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Manager::create (line 182) stdout ----
[INFO] [stdout] error[E0061]: this function takes 3 arguments but 2 arguments were supplied
[INFO] [stdout]    --> src/lib.rs:184:15
[INFO] [stdout]     |
[INFO] [stdout] 184 | let manager = serbo::Manager::new("folder1","folder2");
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^--------------------- argument #3 of type `&str` is missing
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:168:10
[INFO] [stdout]     |
[INFO] [stdout] 168 |   pub fn new(server_files_folder: &str, version_folder: &str, jar_name:&str) -> Manager {
[INFO] [stdout]     |          ^^^
[INFO] [stdout] help: provide the argument
[INFO] [stdout]     |
[INFO] [stdout] 184 - let manager = serbo::Manager::new("folder1","folder2");
[INFO] [stdout] 184 + let manager = serbo::Manager::new("folder1", "folder2", /* &str */);
[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 E0061`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Manager::new (line 163) stdout ----
[INFO] [stdout] error[E0061]: this function takes 3 arguments but 2 arguments were supplied
[INFO] [stdout]    --> src/lib.rs:165:15
[INFO] [stdout]     |
[INFO] [stdout] 165 | let manager = serbo::Manager::new("folder1","folder2");
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^--------------------- argument #3 of type `&str` is missing
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:168:10
[INFO] [stdout]     |
[INFO] [stdout] 168 |   pub fn new(server_files_folder: &str, version_folder: &str, jar_name:&str) -> Manager {
[INFO] [stdout]     |          ^^^
[INFO] [stdout] help: provide the argument
[INFO] [stdout]     |
[INFO] [stdout] 165 - let manager = serbo::Manager::new("folder1","folder2");
[INFO] [stdout] 165 + let manager = serbo::Manager::new("folder1", "folder2", /* &str */);
[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 E0061`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Manager::get (line 201) stdout ----
[INFO] [stdout] error[E0061]: this function takes 3 arguments but 2 arguments were supplied
[INFO] [stdout]    --> src/lib.rs:203:15
[INFO] [stdout]     |
[INFO] [stdout] 203 | let manager = serbo::Manager::new("folder1","folder2");
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^--------------------- argument #3 of type `&str` is missing
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:168:10
[INFO] [stdout]     |
[INFO] [stdout] 168 |   pub fn new(server_files_folder: &str, version_folder: &str, jar_name:&str) -> Manager {
[INFO] [stdout]     |          ^^^
[INFO] [stdout] help: provide the argument
[INFO] [stdout]     |
[INFO] [stdout] 203 - let manager = serbo::Manager::new("folder1","folder2");
[INFO] [stdout] 203 + let manager = serbo::Manager::new("folder1", "folder2", /* &str */);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:205:32
[INFO] [stdout]     |
[INFO] [stdout] 205 | let instance:serbo::Instance = manager.get("1").unwrap();
[INFO] [stdout]     |              ---------------   ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Instance`, found `&mut Instance`
[INFO] [stdout]     |              |
[INFO] [stdout]     |              expected due to this
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0308.
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 4)
[INFO] [stdout]     src/lib.rs - Manager::create (line 182)
[INFO] [stdout]     src/lib.rs - Manager::get (line 201)
[INFO] [stdout]     src/lib.rs - Manager::new (line 163)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 4 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.19s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "0501c516bf57e1ef99c9f992949e6741a1f829728cffede404c358162955b1e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0501c516bf57e1ef99c9f992949e6741a1f829728cffede404c358162955b1e9", kill_on_drop: false }`
[INFO] [stdout] 0501c516bf57e1ef99c9f992949e6741a1f829728cffede404c358162955b1e9
