[INFO] crate pcell 0.7.1 is already in cache
[INFO] extracting crate pcell 0.7.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/pcell/0.7.1
[INFO] extracting crate pcell 0.7.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pcell/0.7.1
[INFO] validating manifest of pcell-0.7.1 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 pcell-0.7.1 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 pcell-0.7.1
[INFO] finished frobbing pcell-0.7.1
[INFO] frobbed toml for pcell-0.7.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/pcell/0.7.1/Cargo.toml
[INFO] started frobbing pcell-0.7.1
[INFO] finished frobbing pcell-0.7.1
[INFO] frobbed toml for pcell-0.7.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pcell/0.7.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 pcell-0.7.1 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/pcell/0.7.1:/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] ec4710840de75040e9f7fc82f6f010a654fd8437f13549d4cde0eb3be8255ce7
[INFO] running `"docker" "start" "-a" "ec4710840de75040e9f7fc82f6f010a654fd8437f13549d4cde0eb3be8255ce7"`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling snap v0.2.5
[INFO] [stderr]    Compiling base64 v0.7.0
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling csv v0.15.0
[INFO] [stderr]    Compiling prettytable-rs v0.6.7
[INFO] [stderr]    Compiling pcell v0.7.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/main.rs:101:13
[INFO] [stderr]     |
[INFO] [stderr] 101 | /             write!(
[INFO] [stderr] 102 | |                 file,
[INFO] [stderr] 103 | |                 "{}",
[INFO] [stderr] 104 | |                 db_strings.as_str()
[INFO] [stderr] 105 | |             ).is_ok();
[INFO] [stderr]     | |______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.37s
[INFO] running `"docker" "inspect" "ec4710840de75040e9f7fc82f6f010a654fd8437f13549d4cde0eb3be8255ce7"`
[INFO] running `"docker" "rm" "-f" "ec4710840de75040e9f7fc82f6f010a654fd8437f13549d4cde0eb3be8255ce7"`
[INFO] [stdout] ec4710840de75040e9f7fc82f6f010a654fd8437f13549d4cde0eb3be8255ce7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/pcell/0.7.1:/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] 71f111408ff1d01d3db3df054aaa2e3e3bc9cd879c74430189a81d25ecf1dcfc
[INFO] running `"docker" "start" "-a" "71f111408ff1d01d3db3df054aaa2e3e3bc9cd879c74430189a81d25ecf1dcfc"`
[INFO] [stderr]    Compiling pcell v0.7.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/main.rs:101:13
[INFO] [stderr]     |
[INFO] [stderr] 101 | /             write!(
[INFO] [stderr] 102 | |                 file,
[INFO] [stderr] 103 | |                 "{}",
[INFO] [stderr] 104 | |                 db_strings.as_str()
[INFO] [stderr] 105 | |             ).is_ok();
[INFO] [stderr]     | |______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `"docker" "inspect" "71f111408ff1d01d3db3df054aaa2e3e3bc9cd879c74430189a81d25ecf1dcfc"`
[INFO] running `"docker" "rm" "-f" "71f111408ff1d01d3db3df054aaa2e3e3bc9cd879c74430189a81d25ecf1dcfc"`
[INFO] [stdout] 71f111408ff1d01d3db3df054aaa2e3e3bc9cd879c74430189a81d25ecf1dcfc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/pcell/0.7.1:/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] d31c8995ab8d868c0455abacc0e3fb5dea069c752629c46badd4efb8a7986af5
[INFO] running `"docker" "start" "-a" "d31c8995ab8d868c0455abacc0e3fb5dea069c752629c46badd4efb8a7986af5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/pcell-0b919c0107aea97d
[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" "d31c8995ab8d868c0455abacc0e3fb5dea069c752629c46badd4efb8a7986af5"`
[INFO] running `"docker" "rm" "-f" "d31c8995ab8d868c0455abacc0e3fb5dea069c752629c46badd4efb8a7986af5"`
[INFO] [stdout] d31c8995ab8d868c0455abacc0e3fb5dea069c752629c46badd4efb8a7986af5