[INFO] updating cached repository iljakuklic/cover
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/iljakuklic/cover
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/iljakuklic/cover" "work/ex/beta-1.38-1/sources/1.37.0/gh/iljakuklic/cover"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/iljakuklic/cover'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/iljakuklic/cover" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/iljakuklic/cover"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/iljakuklic/cover'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 750931d515bdfe52d38eea1d8752e943525e2546
[INFO] sha for GitHub repo iljakuklic/cover: 750931d515bdfe52d38eea1d8752e943525e2546
[INFO] validating manifest of iljakuklic/cover 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 iljakuklic/cover 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 iljakuklic/cover
[INFO] finished frobbing iljakuklic/cover
[INFO] frobbed toml for iljakuklic/cover written to work/ex/beta-1.38-1/sources/1.37.0/gh/iljakuklic/cover/Cargo.toml
[INFO] started frobbing iljakuklic/cover
[INFO] finished frobbing iljakuklic/cover
[INFO] frobbed toml for iljakuklic/cover written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/iljakuklic/cover/Cargo.toml
[INFO] crate iljakuklic/cover 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 iljakuklic/cover 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/iljakuklic/cover:/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] 6da97ce8290360ff5b6fca0292ca3b7d3ddcc55f881212f418ec17aa94e83c49
[INFO] running `"docker" "start" "-a" "6da97ce8290360ff5b6fca0292ca3b7d3ddcc55f881212f418ec17aa94e83c49"`
[INFO] [stderr]    Compiling bitvec v0.6.0
[INFO] [stderr]    Compiling cover v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `transpose`
[INFO] [stderr]    --> src/main.rs:144:5
[INFO] [stderr]     |
[INFO] [stderr] 144 |     fn transpose(self) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_cols`
[INFO] [stderr]    --> src/main.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     fn from_cols(byrow : Vec<(u32, u32)>) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.29s
[INFO] running `"docker" "inspect" "6da97ce8290360ff5b6fca0292ca3b7d3ddcc55f881212f418ec17aa94e83c49"`
[INFO] running `"docker" "rm" "-f" "6da97ce8290360ff5b6fca0292ca3b7d3ddcc55f881212f418ec17aa94e83c49"`
[INFO] [stdout] 6da97ce8290360ff5b6fca0292ca3b7d3ddcc55f881212f418ec17aa94e83c49
[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/iljakuklic/cover:/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] 31c93cdaf5ad5495e9d950742eb23f4a74a029220ef193bec22a8486aa3bf1c9
[INFO] running `"docker" "start" "-a" "31c93cdaf5ad5495e9d950742eb23f4a74a029220ef193bec22a8486aa3bf1c9"`
[INFO] [stderr]    Compiling cover v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `transpose`
[INFO] [stderr]    --> src/main.rs:144:5
[INFO] [stderr]     |
[INFO] [stderr] 144 |     fn transpose(self) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_cols`
[INFO] [stderr]    --> src/main.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     fn from_cols(byrow : Vec<(u32, u32)>) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "31c93cdaf5ad5495e9d950742eb23f4a74a029220ef193bec22a8486aa3bf1c9"`
[INFO] running `"docker" "rm" "-f" "31c93cdaf5ad5495e9d950742eb23f4a74a029220ef193bec22a8486aa3bf1c9"`
[INFO] [stdout] 31c93cdaf5ad5495e9d950742eb23f4a74a029220ef193bec22a8486aa3bf1c9
[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/iljakuklic/cover:/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] 2ecdae14d048df8ff2b68b0b3f6a8142db708bbacbc7339c55e67e806106d85a
[INFO] running `"docker" "start" "-a" "2ecdae14d048df8ff2b68b0b3f6a8142db708bbacbc7339c55e67e806106d85a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cover-ae9b93860f0a5927
[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" "2ecdae14d048df8ff2b68b0b3f6a8142db708bbacbc7339c55e67e806106d85a"`
[INFO] running `"docker" "rm" "-f" "2ecdae14d048df8ff2b68b0b3f6a8142db708bbacbc7339c55e67e806106d85a"`
[INFO] [stdout] 2ecdae14d048df8ff2b68b0b3f6a8142db708bbacbc7339c55e67e806106d85a