[INFO] updating cached repository patrickgombert/tetris
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/patrickgombert/tetris
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/patrickgombert/tetris" "work/ex/beta-1.38-1/sources/1.37.0/gh/patrickgombert/tetris"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/patrickgombert/tetris'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/patrickgombert/tetris" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/patrickgombert/tetris"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/patrickgombert/tetris'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ba13d36550580bf7876f37d3632da77aeaa2b1fb
[INFO] sha for GitHub repo patrickgombert/tetris: ba13d36550580bf7876f37d3632da77aeaa2b1fb
[INFO] validating manifest of patrickgombert/tetris 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 patrickgombert/tetris 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 patrickgombert/tetris
[INFO] finished frobbing patrickgombert/tetris
[INFO] frobbed toml for patrickgombert/tetris written to work/ex/beta-1.38-1/sources/1.37.0/gh/patrickgombert/tetris/Cargo.toml
[INFO] started frobbing patrickgombert/tetris
[INFO] finished frobbing patrickgombert/tetris
[INFO] frobbed toml for patrickgombert/tetris written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/patrickgombert/tetris/Cargo.toml
[INFO] crate patrickgombert/tetris already has a lockfile, it will not be regenerated
[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] testing patrickgombert/tetris against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/patrickgombert/tetris:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 0bde5f338010caba6962aad6f5a5df923fe27ff9312be60ec6b6f2cf865fffd9
[INFO] running `"docker" "start" "-a" "0bde5f338010caba6962aad6f5a5df923fe27ff9312be60ec6b6f2cf865fffd9"`
[INFO] [stderr]    Compiling log v0.4.5
[INFO] [stderr]    Compiling bzip2-sys v0.1.6
[INFO] [stderr]    Compiling stb_truetype v0.2.4
[INFO] [stderr]    Compiling ogg v0.4.1
[INFO] [stderr]    Compiling deflate v0.7.19
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling app_dirs2 v2.0.3
[INFO] [stderr]    Compiling msdos_time v0.1.6
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling generic-array v0.8.3
[INFO] [stderr]    Compiling twox-hash v1.1.1
[INFO] [stderr]    Compiling lewton v0.5.2
[INFO] [stderr]    Compiling smart-default v0.2.0
[INFO] [stderr]    Compiling euclid v0.17.3
[INFO] [stderr]    Compiling sid v0.5.2
[INFO] [stderr]    Compiling ordered-float v0.5.2
[INFO] [stderr]    Compiling cgmath v0.14.1
[INFO] [stderr]    Compiling syn v0.15.13
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling alga v0.5.4
[INFO] [stderr]    Compiling cpal v0.8.2
[INFO] [stderr]    Compiling rusttype v0.5.2
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling lyon_geom v0.10.1
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling zip v0.3.3
[INFO] [stderr]    Compiling lyon_path v0.10.1
[INFO] [stderr]    Compiling nalgebra v0.14.4
[INFO] [stderr]    Compiling rodio v0.7.0
[INFO] [stderr]    Compiling lyon_tessellation v0.10.2
[INFO] [stderr]    Compiling lyon v0.10.2
[INFO] [stderr]    Compiling derivative v1.0.1
[INFO] [stderr]    Compiling num-derive v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling image v0.19.0
[INFO] [stderr]    Compiling gfx_core v0.8.3
[INFO] [stderr] warning[E0502]: cannot borrow `*self` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.14.4/src/core/cg.rs:292:44
[INFO] [stderr]     |
[INFO] [stderr] 292 |                 self[(j, i)] += shift[j] * self[(D::dim() - 1, i)];
[INFO] [stderr]     |                 ---------------------------^^^^-------------------
[INFO] [stderr]     |                 |                          |
[INFO] [stderr]     |                 |                          immutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling gfx v0.17.1
[INFO] [stderr]    Compiling gfx_device_gl v0.15.3
[INFO] [stderr]    Compiling gfx_window_sdl v0.8.0
[INFO] [stderr]    Compiling gfx_glyph v0.10.2
[INFO] [stderr]    Compiling ggez v0.4.4
[INFO] [stderr]    Compiling tetris v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/tetris/grid.rs:97:17
[INFO] [stderr]    |
[INFO] [stderr] 97 |             let mut dead_lines: Vec<&i8> = line_counts
[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]     Finished dev [unoptimized + debuginfo] target(s) in 3m 05s
[INFO] running `"docker" "inspect" "0bde5f338010caba6962aad6f5a5df923fe27ff9312be60ec6b6f2cf865fffd9"`
[INFO] running `"docker" "rm" "-f" "0bde5f338010caba6962aad6f5a5df923fe27ff9312be60ec6b6f2cf865fffd9"`
[INFO] [stdout] 0bde5f338010caba6962aad6f5a5df923fe27ff9312be60ec6b6f2cf865fffd9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/patrickgombert/tetris:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 45bd06b41f4f2ca7549a71f68d006c31b37546415a22b8e14c792396161adf9f
[INFO] running `"docker" "start" "-a" "45bd06b41f4f2ca7549a71f68d006c31b37546415a22b8e14c792396161adf9f"`
[INFO] [stderr]    Compiling tetris v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/tetris/grid.rs:97:17
[INFO] [stderr]    |
[INFO] [stderr] 97 |             let mut dead_lines: Vec<&i8> = line_counts
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.95s
[INFO] running `"docker" "inspect" "45bd06b41f4f2ca7549a71f68d006c31b37546415a22b8e14c792396161adf9f"`
[INFO] running `"docker" "rm" "-f" "45bd06b41f4f2ca7549a71f68d006c31b37546415a22b8e14c792396161adf9f"`
[INFO] [stdout] 45bd06b41f4f2ca7549a71f68d006c31b37546415a22b8e14c792396161adf9f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/patrickgombert/tetris:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 935fcde5665dd3d39df7c9b52f2207a3afaa4c84216440a746633dbe1ff3fa8e
[INFO] running `"docker" "start" "-a" "935fcde5665dd3d39df7c9b52f2207a3afaa4c84216440a746633dbe1ff3fa8e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tetris-df7602cf53df8aa8
[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" "935fcde5665dd3d39df7c9b52f2207a3afaa4c84216440a746633dbe1ff3fa8e"`
[INFO] running `"docker" "rm" "-f" "935fcde5665dd3d39df7c9b52f2207a3afaa4c84216440a746633dbe1ff3fa8e"`
[INFO] [stdout] 935fcde5665dd3d39df7c9b52f2207a3afaa4c84216440a746633dbe1ff3fa8e