[INFO] updating cached repository gregtatum/wasm-canvas
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gregtatum/wasm-canvas
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gregtatum/wasm-canvas" "work/ex/beta-1.37-6/sources/1.36.0/gh/gregtatum/wasm-canvas"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/gregtatum/wasm-canvas'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gregtatum/wasm-canvas" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/gregtatum/wasm-canvas"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/gregtatum/wasm-canvas'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cec7c5d11b33853d6a654d3e56dc871040ddb523
[INFO] sha for GitHub repo gregtatum/wasm-canvas: cec7c5d11b33853d6a654d3e56dc871040ddb523
[INFO] validating manifest of gregtatum/wasm-canvas on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gregtatum/wasm-canvas on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gregtatum/wasm-canvas
[INFO] finished frobbing gregtatum/wasm-canvas
[INFO] frobbed toml for gregtatum/wasm-canvas written to work/ex/beta-1.37-6/sources/1.36.0/gh/gregtatum/wasm-canvas/Cargo.toml
[INFO] started frobbing gregtatum/wasm-canvas
[INFO] finished frobbing gregtatum/wasm-canvas
[INFO] frobbed toml for gregtatum/wasm-canvas written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/gregtatum/wasm-canvas/Cargo.toml
[INFO] crate gregtatum/wasm-canvas already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing gregtatum/wasm-canvas against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/gregtatum/wasm-canvas:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] b68b151d2739c8df88995a9476d9139ab03ba957689592a8dd3c6c51a6c4da87
[INFO] running `"docker" "start" "-a" "b68b151d2739c8df88995a9476d9139ab03ba957689592a8dd3c6c51a6c4da87"`
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.29
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]    Compiling wasm-bindgen v0.2.29
[INFO] [stderr]    Compiling libm v0.1.2
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling humantime v1.1.1
[INFO] [stderr]    Compiling heck v0.3.0
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling syn v0.15.12
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling alga v0.7.2
[INFO] [stderr]    Compiling aho-corasick v0.6.8
[INFO] [stderr]    Compiling nom v4.1.1
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling nalgebra v0.16.12
[INFO] [stderr]    Compiling weedle v0.8.0
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling env_logger v0.6.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.29
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling failure v0.1.2
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.29
[INFO] [stderr]    Compiling wasm-bindgen-webidl v0.2.23
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.29
[INFO] [stderr]    Compiling js-sys v0.3.6
[INFO] [stderr]    Compiling console_error_panic_hook v0.1.5
[INFO] [stderr]    Compiling web-sys v0.3.6
[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-0.16.12/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] 
[INFO] [stderr]    Compiling spade v1.6.0
[INFO] [stderr]    Compiling canvas v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/tree_node.rs:208:17
[INFO] [stderr]     |
[INFO] [stderr] 208 |             let mut nodes_borrow = nodes
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/tree_node.rs:260:17
[INFO] [stderr]     |
[INFO] [stderr] 260 |             let mut child_node = {
[INFO] [stderr]     |                 ----^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 21s
[INFO] running `"docker" "inspect" "b68b151d2739c8df88995a9476d9139ab03ba957689592a8dd3c6c51a6c4da87"`
[INFO] running `"docker" "rm" "-f" "b68b151d2739c8df88995a9476d9139ab03ba957689592a8dd3c6c51a6c4da87"`
[INFO] [stdout] b68b151d2739c8df88995a9476d9139ab03ba957689592a8dd3c6c51a6c4da87
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/gregtatum/wasm-canvas:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] b363643bf39b9aea87ca0666cf2e7d386d51f50b64f096376fe8dc9de0b724ed
[INFO] running `"docker" "start" "-a" "b363643bf39b9aea87ca0666cf2e7d386d51f50b64f096376fe8dc9de0b724ed"`
[INFO] [stderr]    Compiling canvas v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/tree_node.rs:208:17
[INFO] [stderr]     |
[INFO] [stderr] 208 |             let mut nodes_borrow = nodes
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/tree_node.rs:260:17
[INFO] [stderr]     |
[INFO] [stderr] 260 |             let mut child_node = {
[INFO] [stderr]     |                 ----^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.65s
[INFO] running `"docker" "inspect" "b363643bf39b9aea87ca0666cf2e7d386d51f50b64f096376fe8dc9de0b724ed"`
[INFO] running `"docker" "rm" "-f" "b363643bf39b9aea87ca0666cf2e7d386d51f50b64f096376fe8dc9de0b724ed"`
[INFO] [stdout] b363643bf39b9aea87ca0666cf2e7d386d51f50b64f096376fe8dc9de0b724ed
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/gregtatum/wasm-canvas:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 9c2908f9939c70a1e0490c8780376a05276f5d6b77bf4300b32c7dbf0b39120f
[INFO] running `"docker" "start" "-a" "9c2908f9939c70a1e0490c8780376a05276f5d6b77bf4300b32c7dbf0b39120f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/canvas-ac9a5dc27cc247ba
[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" "9c2908f9939c70a1e0490c8780376a05276f5d6b77bf4300b32c7dbf0b39120f"`
[INFO] running `"docker" "rm" "-f" "9c2908f9939c70a1e0490c8780376a05276f5d6b77bf4300b32c7dbf0b39120f"`
[INFO] [stdout] 9c2908f9939c70a1e0490c8780376a05276f5d6b77bf4300b32c7dbf0b39120f