[INFO] cloning repository c7x43t/hello_cargo2
[INFO] running `"git" "clone" "--bare" "git://github.com/c7x43t/hello_cargo2.git" "work/cache/sources/gh/c7x43t/hello_cargo2"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/c7x43t/hello_cargo2'...
[INFO] running `"git" "clone" "work/cache/sources/gh/c7x43t/hello_cargo2" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/c7x43t/hello_cargo2"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/c7x43t/hello_cargo2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/c7x43t/hello_cargo2" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/c7x43t/hello_cargo2"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/c7x43t/hello_cargo2'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ca56607fc36473d00a8f684a3409f93a3db5c595
[INFO] sha for GitHub repo c7x43t/hello_cargo2: ca56607fc36473d00a8f684a3409f93a3db5c595
[INFO] validating manifest of c7x43t/hello_cargo2 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of c7x43t/hello_cargo2 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing c7x43t/hello_cargo2
[INFO] finished frobbing c7x43t/hello_cargo2
[INFO] frobbed toml for c7x43t/hello_cargo2 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/c7x43t/hello_cargo2/Cargo.toml
[INFO] started frobbing c7x43t/hello_cargo2
[INFO] finished frobbing c7x43t/hello_cargo2
[INFO] frobbed toml for c7x43t/hello_cargo2 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/c7x43t/hello_cargo2/Cargo.toml
[INFO] crate c7x43t/hello_cargo2 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking c7x43t/hello_cargo2 against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-0/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/c7x43t/hello_cargo2:/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=forbid" "-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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] db8e979dc3933d612c5918ba374f2d8c3808f21cafe2e064c50e13e4161c4532
[INFO] running `"docker" "start" "-a" "db8e979dc3933d612c5918ba374f2d8c3808f21cafe2e064c50e13e4161c4532"`
[INFO] [stderr]    Compiling num-complex v0.2.2
[INFO] [stderr]     Checking ndarray v0.12.1
[INFO] [stderr]     Checking sprs v0.6.4
[INFO] [stderr] warning[E0502]: cannot borrow `indptr` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/sprs-0.6.4/src/sparse/triplet_iter.rs:122:26
[INFO] [stderr]     |
[INFO] [stderr] 122 |             indptr[i] += indptr[i - 1];
[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]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]     Checking hello_cargo2 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.59s
[INFO] running `"docker" "inspect" "db8e979dc3933d612c5918ba374f2d8c3808f21cafe2e064c50e13e4161c4532"`
[INFO] running `"docker" "rm" "-f" "db8e979dc3933d612c5918ba374f2d8c3808f21cafe2e064c50e13e4161c4532"`
[INFO] [stdout] db8e979dc3933d612c5918ba374f2d8c3808f21cafe2e064c50e13e4161c4532