[INFO] updating cached repository sctincman/shader_playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sctincman/shader_playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sctincman/shader_playground" "work/ex/beta-1.38-1/sources/1.37.0/gh/sctincman/shader_playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/sctincman/shader_playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sctincman/shader_playground" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sctincman/shader_playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sctincman/shader_playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bd9e700551e0a5f70e04e734687809b48ae3e9a3
[INFO] sha for GitHub repo sctincman/shader_playground: bd9e700551e0a5f70e04e734687809b48ae3e9a3
[INFO] validating manifest of sctincman/shader_playground 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 sctincman/shader_playground 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 sctincman/shader_playground
[INFO] finished frobbing sctincman/shader_playground
[INFO] frobbed toml for sctincman/shader_playground written to work/ex/beta-1.38-1/sources/1.37.0/gh/sctincman/shader_playground/Cargo.toml
[INFO] started frobbing sctincman/shader_playground
[INFO] finished frobbing sctincman/shader_playground
[INFO] frobbed toml for sctincman/shader_playground written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sctincman/shader_playground/Cargo.toml
[INFO] crate sctincman/shader_playground 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 sctincman/shader_playground 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-7/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/sctincman/shader_playground:/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] 6dcd8c0011c68e8bf19c16e1f5f1b935ec703700573c10488a4783c9000f408f
[INFO] running `"docker" "start" "-a" "6dcd8c0011c68e8bf19c16e1f5f1b935ec703700573c10488a4783c9000f408f"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling approx v0.3.0
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling glutin v0.18.0
[INFO] [stderr]    Compiling winit v0.17.2
[INFO] [stderr]    Compiling alga v0.7.2
[INFO] [stderr]    Compiling nalgebra v0.16.8
[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-0.16.8/src/base/cg.rs:291:44
[INFO] [stderr]     |
[INFO] [stderr] 291 |                 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 shader_playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `time_step`
[INFO] [stderr]    --> src/main.rs:136:24
[INFO] [stderr]     |
[INFO] [stderr] 136 |     fn step(&mut self, time_step: time::Duration) {
[INFO] [stderr]     |                        ^^^^^^^^^ help: consider prefixing with an underscore: `_time_step`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 51.89s
[INFO] running `"docker" "inspect" "6dcd8c0011c68e8bf19c16e1f5f1b935ec703700573c10488a4783c9000f408f"`
[INFO] running `"docker" "rm" "-f" "6dcd8c0011c68e8bf19c16e1f5f1b935ec703700573c10488a4783c9000f408f"`
[INFO] [stdout] 6dcd8c0011c68e8bf19c16e1f5f1b935ec703700573c10488a4783c9000f408f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/sctincman/shader_playground:/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] 6328cbce4c12c2744b257474b14f69aa0d6a78421615ea0e7d53def53e5361f9
[INFO] running `"docker" "start" "-a" "6328cbce4c12c2744b257474b14f69aa0d6a78421615ea0e7d53def53e5361f9"`
[INFO] [stderr]    Compiling shader_playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `time_step`
[INFO] [stderr]    --> src/main.rs:136:24
[INFO] [stderr]     |
[INFO] [stderr] 136 |     fn step(&mut self, time_step: time::Duration) {
[INFO] [stderr]     |                        ^^^^^^^^^ help: consider prefixing with an underscore: `_time_step`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `"docker" "inspect" "6328cbce4c12c2744b257474b14f69aa0d6a78421615ea0e7d53def53e5361f9"`
[INFO] running `"docker" "rm" "-f" "6328cbce4c12c2744b257474b14f69aa0d6a78421615ea0e7d53def53e5361f9"`
[INFO] [stdout] 6328cbce4c12c2744b257474b14f69aa0d6a78421615ea0e7d53def53e5361f9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/sctincman/shader_playground:/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] 054497b04564a8eee0f2cbcf5596d72a12deb6b477f765c1656bddab933473eb
[INFO] running `"docker" "start" "-a" "054497b04564a8eee0f2cbcf5596d72a12deb6b477f765c1656bddab933473eb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/shader_playground-07e6f5d8fbcdc84d
[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" "054497b04564a8eee0f2cbcf5596d72a12deb6b477f765c1656bddab933473eb"`
[INFO] running `"docker" "rm" "-f" "054497b04564a8eee0f2cbcf5596d72a12deb6b477f765c1656bddab933473eb"`
[INFO] [stdout] 054497b04564a8eee0f2cbcf5596d72a12deb6b477f765c1656bddab933473eb