[INFO] crate tappy 0.1.0 is already in cache
[INFO] extracting crate tappy 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/tappy/0.1.0
[INFO] extracting crate tappy 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/tappy/0.1.0
[INFO] validating manifest of tappy-0.1.0 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 tappy-0.1.0 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 tappy-0.1.0
[INFO] finished frobbing tappy-0.1.0
[INFO] frobbed toml for tappy-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/tappy/0.1.0/Cargo.toml
[INFO] started frobbing tappy-0.1.0
[INFO] finished frobbing tappy-0.1.0
[INFO] frobbed toml for tappy-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/tappy/0.1.0/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 tappy-0.1.0 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/reg/tappy/0.1.0:/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] 3e9d67f6071d47475b4c0b675f907eb5383007d0c983b6d96c362996a90ad438
[INFO] running `"docker" "start" "-a" "3e9d67f6071d47475b4c0b675f907eb5383007d0c983b6d96c362996a90ad438"`
[INFO] [stderr]    Compiling array-macro v1.0.4
[INFO] [stderr]    Compiling reexport-proc-macro v1.0.6
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling enumset_derive v0.3.2
[INFO] [stderr]    Compiling enum-map-derive v0.4.2
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling enum-map v0.4.1
[INFO] [stderr]    Compiling enumset v0.3.19
[INFO] [stderr]    Compiling cursive v0.9.2
[INFO] [stderr]    Compiling tappy v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: a method with this name may be added to the standard library in the future
[INFO] [stderr]   --> src/main.rs:39:38
[INFO] [stderr]    |
[INFO] [stderr] 39 |             let delta = (now - prev).as_secs_f64();
[INFO] [stderr]    |                                      ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unstable_name_collisions)] on by default
[INFO] [stderr]    = warning: once this method is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]    = help: call with fully qualified syntax `AsSecsF64::as_secs_f64(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.91s
[INFO] running `"docker" "inspect" "3e9d67f6071d47475b4c0b675f907eb5383007d0c983b6d96c362996a90ad438"`
[INFO] running `"docker" "rm" "-f" "3e9d67f6071d47475b4c0b675f907eb5383007d0c983b6d96c362996a90ad438"`
[INFO] [stdout] 3e9d67f6071d47475b4c0b675f907eb5383007d0c983b6d96c362996a90ad438
[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/reg/tappy/0.1.0:/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] 7c160da258259062937bb6ae252ce4f4fddfb9567909fac039d98d15650d347f
[INFO] running `"docker" "start" "-a" "7c160da258259062937bb6ae252ce4f4fddfb9567909fac039d98d15650d347f"`
[INFO] [stderr]    Compiling tappy v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: a method with this name may be added to the standard library in the future
[INFO] [stderr]   --> src/main.rs:39:38
[INFO] [stderr]    |
[INFO] [stderr] 39 |             let delta = (now - prev).as_secs_f64();
[INFO] [stderr]    |                                      ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unstable_name_collisions)] on by default
[INFO] [stderr]    = warning: once this method is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]    = help: call with fully qualified syntax `AsSecsF64::as_secs_f64(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "7c160da258259062937bb6ae252ce4f4fddfb9567909fac039d98d15650d347f"`
[INFO] running `"docker" "rm" "-f" "7c160da258259062937bb6ae252ce4f4fddfb9567909fac039d98d15650d347f"`
[INFO] [stdout] 7c160da258259062937bb6ae252ce4f4fddfb9567909fac039d98d15650d347f
[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/reg/tappy/0.1.0:/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] ae9b70b4133989fcbdd117a38666ea7d59f26f1ff7b7eb64d5411ccd03d03b3a
[INFO] running `"docker" "start" "-a" "ae9b70b4133989fcbdd117a38666ea7d59f26f1ff7b7eb64d5411ccd03d03b3a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tappy-b0bd0519ce4ebd03
[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" "ae9b70b4133989fcbdd117a38666ea7d59f26f1ff7b7eb64d5411ccd03d03b3a"`
[INFO] running `"docker" "rm" "-f" "ae9b70b4133989fcbdd117a38666ea7d59f26f1ff7b7eb64d5411ccd03d03b3a"`
[INFO] [stdout] ae9b70b4133989fcbdd117a38666ea7d59f26f1ff7b7eb64d5411ccd03d03b3a