[INFO] updating cached repository aergonaut/artifice
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/aergonaut/artifice
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/aergonaut/artifice" "work/ex/beta-1.38-1/sources/1.37.0/gh/aergonaut/artifice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/aergonaut/artifice'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/aergonaut/artifice" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aergonaut/artifice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aergonaut/artifice'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c9ccab771ea7f0756a9e0b89f478ef9b7a9c7276
[INFO] sha for GitHub repo aergonaut/artifice: c9ccab771ea7f0756a9e0b89f478ef9b7a9c7276
[INFO] validating manifest of aergonaut/artifice 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 aergonaut/artifice 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 aergonaut/artifice
[INFO] finished frobbing aergonaut/artifice
[INFO] frobbed toml for aergonaut/artifice written to work/ex/beta-1.38-1/sources/1.37.0/gh/aergonaut/artifice/Cargo.toml
[INFO] started frobbing aergonaut/artifice
[INFO] finished frobbing aergonaut/artifice
[INFO] frobbed toml for aergonaut/artifice written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aergonaut/artifice/Cargo.toml
[INFO] crate aergonaut/artifice 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 aergonaut/artifice against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aergonaut/artifice:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] b130cd91509899adb5b9de5b2e7a7a28bc5313ca9f67248ddb9b900ca6bd6455
[INFO] running `"docker" "start" "-a" "b130cd91509899adb5b9de5b2e7a7a28bc5313ca9f67248ddb9b900ca6bd6455"`
[INFO] [stderr]    Compiling build_const v0.2.0
[INFO] [stderr]    Compiling serde v1.0.36
[INFO] [stderr]    Compiling rustc-demangle v0.1.7
[INFO] [stderr]    Compiling encode_unicode v0.3.1
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling atty v0.2.8
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling relay v0.1.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling openssl-sys v0.9.27
[INFO] [stderr]    Compiling libz-sys v1.0.18
[INFO] [stderr]    Compiling curl-sys v0.4.1
[INFO] [stderr]    Compiling base64 v0.9.0
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling bytes v0.4.6
[INFO] [stderr]    Compiling csv v0.15.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.1
[INFO] [stderr]    Compiling tokio-timer v0.2.1
[INFO] [stderr]    Compiling libssh2-sys v0.2.6
[INFO] [stderr]    Compiling libgit2-sys v0.7.1
[INFO] [stderr]    Compiling crc v1.7.0
[INFO] [stderr]    Compiling idna v0.1.4
[INFO] [stderr]    Compiling fern v0.5.5
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling clap v2.31.2
[INFO] [stderr]    Compiling uuid v0.5.1
[INFO] [stderr]    Compiling crossbeam-deque v0.3.0
[INFO] [stderr]    Compiling tokio-io v0.1.6
[INFO] [stderr]    Compiling prettytable-rs v0.6.7
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling phf_shared v0.7.21
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling tokio-threadpool v0.1.2
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr] warning[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.7.0/src/form_urlencoded.rs:261:40
[INFO] [stderr]     |
[INFO] [stderr] 259 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 260 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 261 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stderr]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stderr]     |                                        |
[INFO] [stderr]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[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]    Compiling tokio-reactor v0.1.1
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling phf v0.7.21
[INFO] [stderr]    Compiling serde_derive_internals v0.22.2
[INFO] [stderr]    Compiling tokio-tcp v0.1.0
[INFO] [stderr]    Compiling tokio-udp v0.1.0
[INFO] [stderr]    Compiling libflate v0.1.14
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling serde_urlencoded v0.5.1
[INFO] [stderr]    Compiling serde_json v1.0.13
[INFO] [stderr]    Compiling toml v0.4.5
[INFO] [stderr]    Compiling tokio v0.1.5
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.4
[INFO] [stderr]    Compiling backtrace v0.3.5
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling structopt-derive v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.36
[INFO] [stderr]    Compiling tokio-core v0.1.16
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling structopt v0.2.6
[INFO] [stderr]    Compiling hyper v0.11.24
[INFO] [stderr]    Compiling hyper-tls v0.1.3
[INFO] [stderr]    Compiling reqwest v0.8.5
[INFO] [stderr]    Compiling git2 v0.7.1
[INFO] [stderr]    Compiling artifice v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::env::home_dir': This function's behavior is unexpected and probably not what you want. Consider using the home_dir function from https://crates.io/crates/dirs instead.
[INFO] [stderr]   --> src/config.rs:41:24
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let home_dir = std::env::home_dir().ok_or(err_msg("Could not find user's home directory"))?;
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5m 47s
[INFO] running `"docker" "inspect" "b130cd91509899adb5b9de5b2e7a7a28bc5313ca9f67248ddb9b900ca6bd6455"`
[INFO] running `"docker" "rm" "-f" "b130cd91509899adb5b9de5b2e7a7a28bc5313ca9f67248ddb9b900ca6bd6455"`
[INFO] [stdout] b130cd91509899adb5b9de5b2e7a7a28bc5313ca9f67248ddb9b900ca6bd6455
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aergonaut/artifice:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 61fc8ed196e69ff1c64b5c7485e3f14c49678554a0b2f3433c539bc1824f6f39
[INFO] running `"docker" "start" "-a" "61fc8ed196e69ff1c64b5c7485e3f14c49678554a0b2f3433c539bc1824f6f39"`
[INFO] [stderr]    Compiling artifice v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::env::home_dir': This function's behavior is unexpected and probably not what you want. Consider using the home_dir function from https://crates.io/crates/dirs instead.
[INFO] [stderr]   --> src/config.rs:41:24
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let home_dir = std::env::home_dir().ok_or(err_msg("Could not find user's home directory"))?;
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.57s
[INFO] running `"docker" "inspect" "61fc8ed196e69ff1c64b5c7485e3f14c49678554a0b2f3433c539bc1824f6f39"`
[INFO] running `"docker" "rm" "-f" "61fc8ed196e69ff1c64b5c7485e3f14c49678554a0b2f3433c539bc1824f6f39"`
[INFO] [stdout] 61fc8ed196e69ff1c64b5c7485e3f14c49678554a0b2f3433c539bc1824f6f39
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aergonaut/artifice:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 7069a6a5f53c4b8b4358986a8cb6f34acf7d80745d5955cd6ca43f0860f4a4e1
[INFO] running `"docker" "start" "-a" "7069a6a5f53c4b8b4358986a8cb6f34acf7d80745d5955cd6ca43f0860f4a4e1"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/art-5c956c66629fef93
[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] [stderr]      Running /opt/crater/target/debug/deps/art-7399b482597047d3
[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] [stderr]    Doc-tests art
[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" "7069a6a5f53c4b8b4358986a8cb6f34acf7d80745d5955cd6ca43f0860f4a4e1"`
[INFO] running `"docker" "rm" "-f" "7069a6a5f53c4b8b4358986a8cb6f34acf7d80745d5955cd6ca43f0860f4a4e1"`
[INFO] [stdout] 7069a6a5f53c4b8b4358986a8cb6f34acf7d80745d5955cd6ca43f0860f4a4e1