[INFO] updating cached repository Mahtiah/npi_calculatrice
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Mahtiah/npi_calculatrice
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Mahtiah/npi_calculatrice" "work/ex/beta-1.38-1/sources/1.37.0/gh/Mahtiah/npi_calculatrice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Mahtiah/npi_calculatrice'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Mahtiah/npi_calculatrice" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Mahtiah/npi_calculatrice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Mahtiah/npi_calculatrice'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 274077b8e98f306a06e5d3203ebf30b3836be228
[INFO] sha for GitHub repo Mahtiah/npi_calculatrice: 274077b8e98f306a06e5d3203ebf30b3836be228
[INFO] validating manifest of Mahtiah/npi_calculatrice 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 Mahtiah/npi_calculatrice 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 Mahtiah/npi_calculatrice
[INFO] finished frobbing Mahtiah/npi_calculatrice
[INFO] frobbed toml for Mahtiah/npi_calculatrice written to work/ex/beta-1.38-1/sources/1.37.0/gh/Mahtiah/npi_calculatrice/Cargo.toml
[INFO] started frobbing Mahtiah/npi_calculatrice
[INFO] finished frobbing Mahtiah/npi_calculatrice
[INFO] frobbed toml for Mahtiah/npi_calculatrice written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Mahtiah/npi_calculatrice/Cargo.toml
[INFO] crate Mahtiah/npi_calculatrice 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 Mahtiah/npi_calculatrice 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Mahtiah/npi_calculatrice:/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] 79fffb23364de4643465a507eedf13298e5d3af2479532fc2ff7ec7c6177e88f
[INFO] running `"docker" "start" "-a" "79fffb23364de4643465a507eedf13298e5d3af2479532fc2ff7ec7c6177e88f"`
[INFO] [stderr]    Compiling npi_calculatrice v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     std::io::stdout().flush();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `"docker" "inspect" "79fffb23364de4643465a507eedf13298e5d3af2479532fc2ff7ec7c6177e88f"`
[INFO] running `"docker" "rm" "-f" "79fffb23364de4643465a507eedf13298e5d3af2479532fc2ff7ec7c6177e88f"`
[INFO] [stdout] 79fffb23364de4643465a507eedf13298e5d3af2479532fc2ff7ec7c6177e88f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Mahtiah/npi_calculatrice:/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] 61b274793baac7b7866da03d09f6215aef895f47574b70f8d4de26615c03ccd3
[INFO] running `"docker" "start" "-a" "61b274793baac7b7866da03d09f6215aef895f47574b70f8d4de26615c03ccd3"`
[INFO] [stderr]    Compiling npi_calculatrice v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     std::io::stdout().flush();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `"docker" "inspect" "61b274793baac7b7866da03d09f6215aef895f47574b70f8d4de26615c03ccd3"`
[INFO] running `"docker" "rm" "-f" "61b274793baac7b7866da03d09f6215aef895f47574b70f8d4de26615c03ccd3"`
[INFO] [stdout] 61b274793baac7b7866da03d09f6215aef895f47574b70f8d4de26615c03ccd3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Mahtiah/npi_calculatrice:/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] 3e40bfbb1507ee1f4a059f082d3e6c12d02963331e64e3f96fb1fca55159b9e2
[INFO] running `"docker" "start" "-a" "3e40bfbb1507ee1f4a059f082d3e6c12d02963331e64e3f96fb1fca55159b9e2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/npi_calculatrice-a946274f9048f662
[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" "3e40bfbb1507ee1f4a059f082d3e6c12d02963331e64e3f96fb1fca55159b9e2"`
[INFO] running `"docker" "rm" "-f" "3e40bfbb1507ee1f4a059f082d3e6c12d02963331e64e3f96fb1fca55159b9e2"`
[INFO] [stdout] 3e40bfbb1507ee1f4a059f082d3e6c12d02963331e64e3f96fb1fca55159b9e2