[INFO] cloning repository usmanmunara/rust_learning
[INFO] running `"git" "clone" "--bare" "git://github.com/usmanmunara/rust_learning.git" "work/cache/sources/gh/usmanmunara/rust_learning"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/usmanmunara/rust_learning'...
[INFO] running `"git" "clone" "work/cache/sources/gh/usmanmunara/rust_learning" "work/ex/beta-1.37-6/sources/1.36.0/gh/usmanmunara/rust_learning"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/usmanmunara/rust_learning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/usmanmunara/rust_learning" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/usmanmunara/rust_learning"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/usmanmunara/rust_learning'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a117a261b5cbd1e6609ea8100a9ec70ecb41cd64
[INFO] sha for GitHub repo usmanmunara/rust_learning: a117a261b5cbd1e6609ea8100a9ec70ecb41cd64
[INFO] validating manifest of usmanmunara/rust_learning 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 usmanmunara/rust_learning 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 usmanmunara/rust_learning
[INFO] finished frobbing usmanmunara/rust_learning
[INFO] frobbed toml for usmanmunara/rust_learning written to work/ex/beta-1.37-6/sources/1.36.0/gh/usmanmunara/rust_learning/Cargo.toml
[INFO] started frobbing usmanmunara/rust_learning
[INFO] finished frobbing usmanmunara/rust_learning
[INFO] frobbed toml for usmanmunara/rust_learning written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/usmanmunara/rust_learning/Cargo.toml
[INFO] crate usmanmunara/rust_learning already has a lockfile, it will not be regenerated
[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 usmanmunara/rust_learning 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/gh/usmanmunara/rust_learning:/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] 4d351b35dddf3a04eadf36b77f5a6299521982558d49a1a86f73efae9717cb7c
[INFO] running `"docker" "start" "-a" "4d351b35dddf3a04eadf36b77f5a6299521982558d49a1a86f73efae9717cb7c"`
[INFO] [stderr]    Compiling rust_2 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `"docker" "inspect" "4d351b35dddf3a04eadf36b77f5a6299521982558d49a1a86f73efae9717cb7c"`
[INFO] running `"docker" "rm" "-f" "4d351b35dddf3a04eadf36b77f5a6299521982558d49a1a86f73efae9717cb7c"`
[INFO] [stdout] 4d351b35dddf3a04eadf36b77f5a6299521982558d49a1a86f73efae9717cb7c
[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/gh/usmanmunara/rust_learning:/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] c74e57dfef962e0c74d45755379960be6d56ecccbe8d4fe179fda4b5f589346b
[INFO] running `"docker" "start" "-a" "c74e57dfef962e0c74d45755379960be6d56ecccbe8d4fe179fda4b5f589346b"`
[INFO] [stderr]    Compiling rust_2 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `"docker" "inspect" "c74e57dfef962e0c74d45755379960be6d56ecccbe8d4fe179fda4b5f589346b"`
[INFO] running `"docker" "rm" "-f" "c74e57dfef962e0c74d45755379960be6d56ecccbe8d4fe179fda4b5f589346b"`
[INFO] [stdout] c74e57dfef962e0c74d45755379960be6d56ecccbe8d4fe179fda4b5f589346b
[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/gh/usmanmunara/rust_learning:/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] 7ffaf7715700c7c3f30e67162e3fa07044fb7b17e27673a8944915e7e0cf6cb5
[INFO] running `"docker" "start" "-a" "7ffaf7715700c7c3f30e67162e3fa07044fb7b17e27673a8944915e7e0cf6cb5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_2-38d8b707b4894cee
[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" "7ffaf7715700c7c3f30e67162e3fa07044fb7b17e27673a8944915e7e0cf6cb5"`
[INFO] running `"docker" "rm" "-f" "7ffaf7715700c7c3f30e67162e3fa07044fb7b17e27673a8944915e7e0cf6cb5"`
[INFO] [stdout] 7ffaf7715700c7c3f30e67162e3fa07044fb7b17e27673a8944915e7e0cf6cb5