[INFO] crate display-99bugs-driver 0.1.0-a is already in cache
[INFO] extracting crate display-99bugs-driver 0.1.0-a into work/ex/beta-1.38-1/sources/1.37.0/reg/display-99bugs-driver/0.1.0-a
[INFO] extracting crate display-99bugs-driver 0.1.0-a into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/display-99bugs-driver/0.1.0-a
[INFO] validating manifest of display-99bugs-driver-0.1.0-a on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of display-99bugs-driver-0.1.0-a on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing display-99bugs-driver-0.1.0-a
[INFO] finished frobbing display-99bugs-driver-0.1.0-a
[INFO] frobbed toml for display-99bugs-driver-0.1.0-a written to work/ex/beta-1.38-1/sources/1.37.0/reg/display-99bugs-driver/0.1.0-a/Cargo.toml
[INFO] started frobbing display-99bugs-driver-0.1.0-a
[INFO] finished frobbing display-99bugs-driver-0.1.0-a
[INFO] frobbed toml for display-99bugs-driver-0.1.0-a written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/display-99bugs-driver/0.1.0-a/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing display-99bugs-driver-0.1.0-a against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/display-99bugs-driver/0.1.0-a:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] aec35c431c7aad245780d2414293e7c3c711d4ebeff841c7a78dbbc80a74e5af
[INFO] running `"docker" "start" "-a" "aec35c431c7aad245780d2414293e7c3c711d4ebeff841c7a78dbbc80a74e5af"`
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling nix v0.6.0
[INFO] [stderr]    Compiling spidev v0.3.0
[INFO] [stderr]    Compiling display-99bugs-driver v0.1.0-a (/opt/crater/workdir)
[INFO] [stderr] warning: constant item is never used: `PANEL_LINE_COUNT`
[INFO] [stderr]  --> src/display.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub const PANEL_LINE_COUNT: usize = 32;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PANEL_COUNT`
[INFO] [stderr]  --> src/display.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub const PANEL_COUNT: usize = 6;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PANEL_BUFFER_SIZE`
[INFO] [stderr]   --> src/display.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub const PANEL_BUFFER_SIZE: usize = LINE_BUFFER_SIZE * PANEL_LINE_COUNT;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FRAME_BUFFER_SIZE`
[INFO] [stderr]   --> src/display.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub const FRAME_BUFFER_SIZE: usize = PANEL_BUFFER_SIZE * PANEL_COUNT;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PANEL_MODE`
[INFO] [stderr]   --> src/display.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | const PANEL_MODE: u8 = 0x02;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FRAME_MODE`
[INFO] [stderr]   --> src/display.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | const FRAME_MODE: u8 = 0x03;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write_frame`
[INFO] [stderr]   --> src/display.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn write_frame(&mut self, data: &[u8]) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `HEADER_SIZE`
[INFO] [stderr]   --> src/display.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         const HEADER_SIZE: usize = 1;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.65s
[INFO] running `"docker" "inspect" "aec35c431c7aad245780d2414293e7c3c711d4ebeff841c7a78dbbc80a74e5af"`
[INFO] running `"docker" "rm" "-f" "aec35c431c7aad245780d2414293e7c3c711d4ebeff841c7a78dbbc80a74e5af"`
[INFO] [stdout] aec35c431c7aad245780d2414293e7c3c711d4ebeff841c7a78dbbc80a74e5af
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/display-99bugs-driver/0.1.0-a:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 52b984cd603a158a6bb59812460f1206d9f611bc8babb9bdfaf794c7b8710bdc
[INFO] running `"docker" "start" "-a" "52b984cd603a158a6bb59812460f1206d9f611bc8babb9bdfaf794c7b8710bdc"`
[INFO] [stderr]    Compiling display-99bugs-driver v0.1.0-a (/opt/crater/workdir)
[INFO] [stderr] warning: constant item is never used: `PANEL_LINE_COUNT`
[INFO] [stderr]  --> src/display.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub const PANEL_LINE_COUNT: usize = 32;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PANEL_COUNT`
[INFO] [stderr]  --> src/display.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub const PANEL_COUNT: usize = 6;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PANEL_BUFFER_SIZE`
[INFO] [stderr]   --> src/display.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub const PANEL_BUFFER_SIZE: usize = LINE_BUFFER_SIZE * PANEL_LINE_COUNT;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FRAME_BUFFER_SIZE`
[INFO] [stderr]   --> src/display.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub const FRAME_BUFFER_SIZE: usize = PANEL_BUFFER_SIZE * PANEL_COUNT;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PANEL_MODE`
[INFO] [stderr]   --> src/display.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | const PANEL_MODE: u8 = 0x02;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FRAME_MODE`
[INFO] [stderr]   --> src/display.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | const FRAME_MODE: u8 = 0x03;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write_frame`
[INFO] [stderr]   --> src/display.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn write_frame(&mut self, data: &[u8]) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `HEADER_SIZE`
[INFO] [stderr]   --> src/display.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         const HEADER_SIZE: usize = 1;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `"docker" "inspect" "52b984cd603a158a6bb59812460f1206d9f611bc8babb9bdfaf794c7b8710bdc"`
[INFO] running `"docker" "rm" "-f" "52b984cd603a158a6bb59812460f1206d9f611bc8babb9bdfaf794c7b8710bdc"`
[INFO] [stdout] 52b984cd603a158a6bb59812460f1206d9f611bc8babb9bdfaf794c7b8710bdc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/display-99bugs-driver/0.1.0-a:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] db2e59f9cf4043e46750cdd3dc87b8a24a7e9c67d0c6bb9c9489de6edc32a282
[INFO] running `"docker" "start" "-a" "db2e59f9cf4043e46750cdd3dc87b8a24a7e9c67d0c6bb9c9489de6edc32a282"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/display_99bugs_driver-61d4f0729e1d9249
[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" "db2e59f9cf4043e46750cdd3dc87b8a24a7e9c67d0c6bb9c9489de6edc32a282"`
[INFO] running `"docker" "rm" "-f" "db2e59f9cf4043e46750cdd3dc87b8a24a7e9c67d0c6bb9c9489de6edc32a282"`
[INFO] [stdout] db2e59f9cf4043e46750cdd3dc87b8a24a7e9c67d0c6bb9c9489de6edc32a282