[INFO] updating cached repository https://github.com/Altefore/2048-GUI
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/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] d6aa4e6f6da3cc591dbf798b0f285899b93d3757
[INFO] testing Altefore/2048-GUI against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FAltefore%2F2048-GUI" "work/builds/worker-9/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  87% (447/510)   
Checking out files:  88% (449/510)   
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Checking out files: 100% (510/510)   
Checking out files: 100% (510/510), done.
[INFO] validating manifest of git repo https://github.com/Altefore/2048-GUI on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Altefore/2048-GUI
[INFO] finished tweaking git repo https://github.com/Altefore/2048-GUI
[INFO] tweaked toml for git repo https://github.com/Altefore/2048-GUI written to work/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Altefore/2048-GUI already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /big/crater/work/builds/worker-9/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://bitbucket.org/AdrienChampion/rust_2048.git`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 96afe62b2a2509c6fbb071ef5d520695891b5287e5af7cb0fb8653229cf23f3a
[INFO] running `"docker" "start" "-a" "96afe62b2a2509c6fbb071ef5d520695891b5287e5af7cb0fb8653229cf23f3a"`
[INFO] [stderr]    Compiling piston-texture v0.8.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling gl_generator v0.10.0
[INFO] [stderr]    Compiling pistoncore-input v0.28.0
[INFO] [stderr]    Compiling image v0.22.3
[INFO] [stderr]    Compiling piston2d-graphics v0.35.0
[INFO] [stderr]    Compiling lib_2048 v0.1.0 (https://bitbucket.org/AdrienChampion/rust_2048.git?rev=3791048#3791048f)
[INFO] [stderr] error[E0432]: unresolved import `rand::IsaacRng`
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/rust_2048-e4b2572afb50011c/3791048/src/common.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use rand::IsaacRng ;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^ no `IsaacRng` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/rust_2048-e4b2572afb50011c/3791048/src/common.rs:107:13
[INFO] [stderr]     |
[INFO] [stderr] 107 |         use rand::Rand ;
[INFO] [stderr]     |             ^^^^^^^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::IsaacRng`
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/rust_2048-e4b2572afb50011c/3791048/src/grid.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rand::IsaacRng ;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^ no `IsaacRng` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/rust_2048-e4b2572afb50011c/3791048/src/grid.rs:228:9
[INFO] [stderr]     |
[INFO] [stderr] 228 |     use rand::Rand ;
[INFO] [stderr]     |         ^^^^^^^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `StdRng` in `rand`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/rust_2048-e4b2572afb50011c/3791048/src/common.rs:105:17
[INFO] [stderr]     |
[INFO] [stderr] 105 |     match rand::StdRng::new() {
[INFO] [stderr]     |                 ^^^^^^ could not find `StdRng` in `rand`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `rand` found for type `u8` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/rust_2048-e4b2572afb50011c/3791048/src/common.rs:111:26
[INFO] [stderr]     |
[INFO] [stderr] 111 |           let val = (u8::rand(& mut rng) % 26) + 97 ;
[INFO] [stderr]     |                          ^^^^ function or associated item not found in `u8`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `rand` found for type `u8` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/rust_2048-e4b2572afb50011c/3791048/src/grid.rs:231:34
[INFO] [stderr]     |
[INFO] [stderr] 231 |       let (row, col) = free[(u8::rand(& mut self.rng) as usize) % free.len()] ;
[INFO] [stderr]     |                                  ^^^^ function or associated item not found in `u8`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `rand` found for type `u8` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/rust_2048-e4b2572afb50011c/3791048/src/grid.rs:232:24
[INFO] [stderr]     |
[INFO] [stderr] 232 |       let pow = if u8::rand(& mut self.rng) % 100u8 > 80u8 {
[INFO] [stderr]     |                        ^^^^ function or associated item not found in `u8`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 8 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0433, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `lib_2048`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "96afe62b2a2509c6fbb071ef5d520695891b5287e5af7cb0fb8653229cf23f3a"`
[INFO] running `"docker" "rm" "-f" "96afe62b2a2509c6fbb071ef5d520695891b5287e5af7cb0fb8653229cf23f3a"`
[INFO] [stdout] 96afe62b2a2509c6fbb071ef5d520695891b5287e5af7cb0fb8653229cf23f3a