[INFO] updating cached repository liuyanghejerry/rust-wasm-size-bug
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/liuyanghejerry/rust-wasm-size-bug
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/liuyanghejerry/rust-wasm-size-bug" "work/ex/beta-1.38-1/sources/1.37.0/gh/liuyanghejerry/rust-wasm-size-bug"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/liuyanghejerry/rust-wasm-size-bug'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/liuyanghejerry/rust-wasm-size-bug" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/liuyanghejerry/rust-wasm-size-bug"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/liuyanghejerry/rust-wasm-size-bug'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7f77930eea9150e3c1aace45ba838b201e6af730
[INFO] sha for GitHub repo liuyanghejerry/rust-wasm-size-bug: 7f77930eea9150e3c1aace45ba838b201e6af730
[INFO] validating manifest of liuyanghejerry/rust-wasm-size-bug 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 liuyanghejerry/rust-wasm-size-bug 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 liuyanghejerry/rust-wasm-size-bug
[INFO] finished frobbing liuyanghejerry/rust-wasm-size-bug
[INFO] frobbed toml for liuyanghejerry/rust-wasm-size-bug written to work/ex/beta-1.38-1/sources/1.37.0/gh/liuyanghejerry/rust-wasm-size-bug/Cargo.toml
[INFO] started frobbing liuyanghejerry/rust-wasm-size-bug
[INFO] finished frobbing liuyanghejerry/rust-wasm-size-bug
[INFO] frobbed toml for liuyanghejerry/rust-wasm-size-bug written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/liuyanghejerry/rust-wasm-size-bug/Cargo.toml
[INFO] crate liuyanghejerry/rust-wasm-size-bug 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 liuyanghejerry/rust-wasm-size-bug against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/liuyanghejerry/rust-wasm-size-bug:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 86966fb55d580987478b063c5dec14e7493da8fd0bb5e7fd0dce283933bd6033
[INFO] running `"docker" "start" "-a" "86966fb55d580987478b063c5dec14e7493da8fd0bb5e7fd0dce283933bd6033"`
[INFO] [stderr]    Compiling wasm-size-bug v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]  --> src/lib.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let buf : &[u8] = std::slice::from_raw_parts(ptr, length as usize);
[INFO] [stderr]   |         ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "86966fb55d580987478b063c5dec14e7493da8fd0bb5e7fd0dce283933bd6033"`
[INFO] running `"docker" "rm" "-f" "86966fb55d580987478b063c5dec14e7493da8fd0bb5e7fd0dce283933bd6033"`
[INFO] [stdout] 86966fb55d580987478b063c5dec14e7493da8fd0bb5e7fd0dce283933bd6033
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/liuyanghejerry/rust-wasm-size-bug:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ec768d41c246489dd1ec62b79a81c42a51ec40a8467afd8ae86146b2be6dd9e7
[INFO] running `"docker" "start" "-a" "ec768d41c246489dd1ec62b79a81c42a51ec40a8467afd8ae86146b2be6dd9e7"`
[INFO] [stderr]    Compiling wasm-size-bug v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]  --> src/lib.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let buf : &[u8] = std::slice::from_raw_parts(ptr, length as usize);
[INFO] [stderr]   |         ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "ec768d41c246489dd1ec62b79a81c42a51ec40a8467afd8ae86146b2be6dd9e7"`
[INFO] running `"docker" "rm" "-f" "ec768d41c246489dd1ec62b79a81c42a51ec40a8467afd8ae86146b2be6dd9e7"`
[INFO] [stdout] ec768d41c246489dd1ec62b79a81c42a51ec40a8467afd8ae86146b2be6dd9e7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/liuyanghejerry/rust-wasm-size-bug:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 83ed051035fa89ffeb790832f1fe744df26295af95ec75991b8ad0a21b87780c
[INFO] running `"docker" "start" "-a" "83ed051035fa89ffeb790832f1fe744df26295af95ec75991b8ad0a21b87780c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/wasm_size_bug-fb01f33f7402c438
[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" "83ed051035fa89ffeb790832f1fe744df26295af95ec75991b8ad0a21b87780c"`
[INFO] running `"docker" "rm" "-f" "83ed051035fa89ffeb790832f1fe744df26295af95ec75991b8ad0a21b87780c"`
[INFO] [stdout] 83ed051035fa89ffeb790832f1fe744df26295af95ec75991b8ad0a21b87780c