[INFO] updating cached repository https://github.com/strangelovephd/minesweeper [INFO] running `"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"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 9ebc94507a558f3c8f62f0ad5a29af86bbf794e3 [INFO] testing strangelovephd/minesweeper against beta-2020-06-03 for beta-1.45-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstrangelovephd%2Fminesweeper" "/workspace/builds/worker-11/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/strangelovephd/minesweeper 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/strangelovephd/minesweeper [INFO] finished tweaking git repo https://github.com/strangelovephd/minesweeper [INFO] tweaked toml for git repo https://github.com/strangelovephd/minesweeper written to /workspace/builds/worker-11/source/Cargo.toml [INFO] crate git repo https://github.com/strangelovephd/minesweeper 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] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stdout] 9b1c92fb8d2b24a19009a38c417c0d02d699a3657829c243d71bd61d75f0409e [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `"docker" "start" "-a" "9b1c92fb8d2b24a19009a38c417c0d02d699a3657829c243d71bd61d75f0409e"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling serde v1.0.87 [INFO] [stderr] Compiling libloading v0.5.0 [INFO] [stderr] Compiling khronos_api v3.0.0 [INFO] [stderr] Compiling inflate v0.4.4 [INFO] [stderr] Compiling smallvec v0.6.8 [INFO] [stderr] Compiling num_cpus v1.9.0 [INFO] [stderr] Compiling memmap v0.7.0 [INFO] [stderr] Compiling shared_library v0.1.9 [INFO] [stderr] Compiling x11-dl v2.18.3 [INFO] [stderr] Compiling approx v0.3.1 [INFO] [stderr] Compiling syn v0.15.26 [INFO] [stderr] Compiling wayland-client v0.21.11 [INFO] [stderr] Compiling wayland-protocols v0.21.11 [INFO] [stderr] Compiling rayon-core v1.4.1 [INFO] [stderr] Compiling rusttype v0.7.4 [INFO] [stderr] Compiling osmesa-sys v0.1.2 [INFO] [stderr] Compiling parking_lot_core v0.4.0 [INFO] [stderr] Compiling gl_generator v0.10.0 [INFO] [stderr] Compiling png v0.14.0 [INFO] [stderr] Compiling parking_lot v0.7.1 [INFO] [stderr] Compiling dlib v0.4.1 [INFO] [stderr] Compiling rayon v1.0.3 [INFO] [stderr] Compiling wayland-sys v0.21.11 [INFO] [stderr] Compiling andrew v0.1.6 [INFO] [stderr] Compiling piston2d-graphics v0.30.0 [INFO] [stderr] Compiling wayland-commons v0.21.11 [INFO] [stderr] Compiling gl v0.11.0 [INFO] [stderr] Compiling glutin v0.19.0 [INFO] [stderr] Compiling jpeg-decoder v0.1.15 [INFO] [stderr] Compiling serde_derive v1.0.87 [INFO] [stderr] Compiling num-derive v0.2.4 [INFO] [stderr] Compiling tiff v0.2.2 [INFO] [stderr] Compiling image v0.21.0 [INFO] [stderr] Compiling smithay-client-toolkit v0.4.4 [INFO] [stderr] Compiling pistoncore-input v0.23.0 [INFO] [stderr] Compiling winit v0.18.1 [INFO] [stderr] Compiling piston2d-opengl_graphics v0.59.0 [INFO] [stderr] Compiling pistoncore-window v0.35.0 [INFO] [stderr] Compiling pistoncore-event_loop v0.40.0 [INFO] [stderr] Compiling piston v0.40.0 [INFO] [stderr] Compiling pistoncore-glutin_window v0.52.0 [INFO] [stderr] Compiling minesweeper v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused variable: `temp_val` [INFO] [stderr] --> src/minesweeper.rs:81:13 [INFO] [stderr] | [INFO] [stderr] 81 | let temp_val: i32 = index as i32; [INFO] [stderr] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temp_val` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `pos` [INFO] [stderr] --> src/minesweeper_controller.rs:27:46 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_pos` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `size` [INFO] [stderr] --> src/minesweeper_controller.rs:27:61 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_size` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `e` [INFO] [stderr] --> src/minesweeper_controller.rs:27:72 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_e` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:35:9 [INFO] [stderr] | [INFO] [stderr] 35 | let mut minesweeper_controller = MinesweeperController::new(minesweeper); [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: variant is never constructed: `Intermediate` [INFO] [stderr] --> src/minesweeper.rs:18:5 [INFO] [stderr] | [INFO] [stderr] 18 | Intermediate, [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Expert` [INFO] [stderr] --> src/minesweeper.rs:19:5 [INFO] [stderr] | [INFO] [stderr] 19 | Expert, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `init` [INFO] [stderr] --> src/minesweeper.rs:64:12 [INFO] [stderr] | [INFO] [stderr] 64 | pub fn init(&mut self) { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Open` [INFO] [stderr] --> src/minesweeper.rs:92:5 [INFO] [stderr] | [INFO] [stderr] 92 | Open(u8), [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `new` [INFO] [stderr] --> src/minesweeper.rs:106:12 [INFO] [stderr] | [INFO] [stderr] 106 | pub fn new() -> Cell { [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `toggle` [INFO] [stderr] --> src/minesweeper.rs:115:12 [INFO] [stderr] | [INFO] [stderr] 115 | pub fn toggle(&mut self) -> bool { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `event` [INFO] [stderr] --> src/minesweeper_controller.rs:27:12 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 12 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 52s [INFO] running `"docker" "inspect" "9b1c92fb8d2b24a19009a38c417c0d02d699a3657829c243d71bd61d75f0409e"` [INFO] running `"docker" "rm" "-f" "9b1c92fb8d2b24a19009a38c417c0d02d699a3657829c243d71bd61d75f0409e"` [INFO] [stdout] 9b1c92fb8d2b24a19009a38c417c0d02d699a3657829c243d71bd61d75f0409e [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 1dbc05839df78ed4efe0b7f6da004a21fa2306ec29a54f5819b6f4d7f5d57e4d [INFO] running `"docker" "start" "-a" "1dbc05839df78ed4efe0b7f6da004a21fa2306ec29a54f5819b6f4d7f5d57e4d"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling minesweeper v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused variable: `temp_val` [INFO] [stderr] --> src/minesweeper.rs:81:13 [INFO] [stderr] | [INFO] [stderr] 81 | let temp_val: i32 = index as i32; [INFO] [stderr] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temp_val` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `pos` [INFO] [stderr] --> src/minesweeper_controller.rs:27:46 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_pos` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `size` [INFO] [stderr] --> src/minesweeper_controller.rs:27:61 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_size` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `e` [INFO] [stderr] --> src/minesweeper_controller.rs:27:72 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_e` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:35:9 [INFO] [stderr] | [INFO] [stderr] 35 | let mut minesweeper_controller = MinesweeperController::new(minesweeper); [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: variant is never constructed: `Intermediate` [INFO] [stderr] --> src/minesweeper.rs:18:5 [INFO] [stderr] | [INFO] [stderr] 18 | Intermediate, [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Expert` [INFO] [stderr] --> src/minesweeper.rs:19:5 [INFO] [stderr] | [INFO] [stderr] 19 | Expert, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `init` [INFO] [stderr] --> src/minesweeper.rs:64:12 [INFO] [stderr] | [INFO] [stderr] 64 | pub fn init(&mut self) { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Open` [INFO] [stderr] --> src/minesweeper.rs:92:5 [INFO] [stderr] | [INFO] [stderr] 92 | Open(u8), [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `new` [INFO] [stderr] --> src/minesweeper.rs:106:12 [INFO] [stderr] | [INFO] [stderr] 106 | pub fn new() -> Cell { [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `toggle` [INFO] [stderr] --> src/minesweeper.rs:115:12 [INFO] [stderr] | [INFO] [stderr] 115 | pub fn toggle(&mut self) -> bool { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `event` [INFO] [stderr] --> src/minesweeper_controller.rs:27:12 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 12 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.60s [INFO] running `"docker" "inspect" "1dbc05839df78ed4efe0b7f6da004a21fa2306ec29a54f5819b6f4d7f5d57e4d"` [INFO] running `"docker" "rm" "-f" "1dbc05839df78ed4efe0b7f6da004a21fa2306ec29a54f5819b6f4d7f5d57e4d"` [INFO] [stdout] 1dbc05839df78ed4efe0b7f6da004a21fa2306ec29a54f5819b6f4d7f5d57e4d [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 2ea966f24963a52adc2b82b77132fe4f90129ff7662273a1dd512f4b29c30cb3 [INFO] running `"docker" "start" "-a" "2ea966f24963a52adc2b82b77132fe4f90129ff7662273a1dd512f4b29c30cb3"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] warning: unused variable: `temp_val` [INFO] [stderr] --> src/minesweeper.rs:81:13 [INFO] [stderr] | [INFO] [stderr] 81 | let temp_val: i32 = index as i32; [INFO] [stderr] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temp_val` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `pos` [INFO] [stderr] --> src/minesweeper_controller.rs:27:46 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_pos` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `size` [INFO] [stderr] --> src/minesweeper_controller.rs:27:61 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_size` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `e` [INFO] [stderr] --> src/minesweeper_controller.rs:27:72 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_e` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:35:9 [INFO] [stderr] | [INFO] [stderr] 35 | let mut minesweeper_controller = MinesweeperController::new(minesweeper); [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: variant is never constructed: `Intermediate` [INFO] [stderr] --> src/minesweeper.rs:18:5 [INFO] [stderr] | [INFO] [stderr] 18 | Intermediate, [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Expert` [INFO] [stderr] --> src/minesweeper.rs:19:5 [INFO] [stderr] | [INFO] [stderr] 19 | Expert, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `init` [INFO] [stderr] --> src/minesweeper.rs:64:12 [INFO] [stderr] | [INFO] [stderr] 64 | pub fn init(&mut self) { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Open` [INFO] [stderr] --> src/minesweeper.rs:92:5 [INFO] [stderr] | [INFO] [stderr] 92 | Open(u8), [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `new` [INFO] [stderr] --> src/minesweeper.rs:106:12 [INFO] [stderr] | [INFO] [stderr] 106 | pub fn new() -> Cell { [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `toggle` [INFO] [stderr] --> src/minesweeper.rs:115:12 [INFO] [stderr] | [INFO] [stderr] 115 | pub fn toggle(&mut self) -> bool { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `event` [INFO] [stderr] --> src/minesweeper_controller.rs:27:12 [INFO] [stderr] | [INFO] [stderr] 27 | pub fn event(&mut self, pos: [f64; 2], size: f64, e: &E) { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 12 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.25s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/minesweeper-543c0e5bbe7c76b9 [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" "2ea966f24963a52adc2b82b77132fe4f90129ff7662273a1dd512f4b29c30cb3"` [INFO] running `"docker" "rm" "-f" "2ea966f24963a52adc2b82b77132fe4f90129ff7662273a1dd512f4b29c30cb3"` [INFO] [stdout] 2ea966f24963a52adc2b82b77132fe4f90129ff7662273a1dd512f4b29c30cb3