[INFO] crate wasm_val 0.3.5 is already in cache
[INFO] extracting crate wasm_val 0.3.5 into work/ex/beta-1.37-6/sources/1.36.0/reg/wasm_val/0.3.5
[INFO] extracting crate wasm_val 0.3.5 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/wasm_val/0.3.5
[INFO] validating manifest of wasm_val-0.3.5 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 wasm_val-0.3.5 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 wasm_val-0.3.5
[INFO] finished frobbing wasm_val-0.3.5
[INFO] frobbed toml for wasm_val-0.3.5 written to work/ex/beta-1.37-6/sources/1.36.0/reg/wasm_val/0.3.5/Cargo.toml
[INFO] started frobbing wasm_val-0.3.5
[INFO] finished frobbing wasm_val-0.3.5
[INFO] frobbed toml for wasm_val-0.3.5 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/wasm_val/0.3.5/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing wasm_val-0.3.5 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/wasm_val/0.3.5:/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] d500a67723a1ce92d46b145e49a8970765ce5b5f35df2ca42fbb47305075398f
[INFO] running `"docker" "start" "-a" "d500a67723a1ce92d46b145e49a8970765ce5b5f35df2ca42fbb47305075398f"`
[INFO] [stderr]    Compiling wasm_val v0.3.5 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/js_val_impl/new.rs:40:21
[INFO] [stderr]    |
[INFO] [stderr] 40 |                 let mut vec = Vec::with_capacity(alloc_size as usize);
[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 1.41s
[INFO] running `"docker" "inspect" "d500a67723a1ce92d46b145e49a8970765ce5b5f35df2ca42fbb47305075398f"`
[INFO] running `"docker" "rm" "-f" "d500a67723a1ce92d46b145e49a8970765ce5b5f35df2ca42fbb47305075398f"`
[INFO] [stdout] d500a67723a1ce92d46b145e49a8970765ce5b5f35df2ca42fbb47305075398f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/wasm_val/0.3.5:/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] 790c461457101c1ee8ff8ae59bb797973cc53248b8cf36d955dbf595f014486b
[INFO] running `"docker" "start" "-a" "790c461457101c1ee8ff8ae59bb797973cc53248b8cf36d955dbf595f014486b"`
[INFO] [stderr]    Compiling wasm_val v0.3.5 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/js_val_impl/new.rs:40:21
[INFO] [stderr]    |
[INFO] [stderr] 40 |                 let mut vec = Vec::with_capacity(alloc_size as usize);
[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 1.36s
[INFO] running `"docker" "inspect" "790c461457101c1ee8ff8ae59bb797973cc53248b8cf36d955dbf595f014486b"`
[INFO] running `"docker" "rm" "-f" "790c461457101c1ee8ff8ae59bb797973cc53248b8cf36d955dbf595f014486b"`
[INFO] [stdout] 790c461457101c1ee8ff8ae59bb797973cc53248b8cf36d955dbf595f014486b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/wasm_val/0.3.5:/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] 16bfc134409848c59a384c62d8728ead62d53078f42b4b7e11a85f690fd775ba
[INFO] running `"docker" "start" "-a" "16bfc134409848c59a384c62d8728ead62d53078f42b4b7e11a85f690fd775ba"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/wasm_val-6b7b6749f3cced6e
[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] [stderr]    Doc-tests wasm_val
[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" "16bfc134409848c59a384c62d8728ead62d53078f42b4b7e11a85f690fd775ba"`
[INFO] running `"docker" "rm" "-f" "16bfc134409848c59a384c62d8728ead62d53078f42b4b7e11a85f690fd775ba"`
[INFO] [stdout] 16bfc134409848c59a384c62d8728ead62d53078f42b4b7e11a85f690fd775ba