[INFO] crate howto-cli 0.2.0 is already in cache
[INFO] extracting crate howto-cli 0.2.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/howto-cli/0.2.0
[INFO] extracting crate howto-cli 0.2.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/howto-cli/0.2.0
[INFO] validating manifest of howto-cli-0.2.0 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 howto-cli-0.2.0 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 howto-cli-0.2.0
[INFO] finished frobbing howto-cli-0.2.0
[INFO] frobbed toml for howto-cli-0.2.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/howto-cli/0.2.0/Cargo.toml
[INFO] started frobbing howto-cli-0.2.0
[INFO] finished frobbing howto-cli-0.2.0
[INFO] frobbed toml for howto-cli-0.2.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/howto-cli/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing howto-cli-0.2.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/howto-cli/0.2.0:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] bb0f3cd9ff2f9bcedacba193b8a610a7fab90b20a2d68d96b6c2d4ec88b5058e
[INFO] running `"docker" "start" "-a" "bb0f3cd9ff2f9bcedacba193b8a610a7fab90b20a2d68d96b6c2d4ec88b5058e"`
[INFO] [stderr]    Compiling selectors v0.20.0
[INFO] [stderr]    Compiling cssparser v0.24.1
[INFO] [stderr]    Compiling markup5ever v0.7.5
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr] warning[E0506]: cannot assign to `self.input.cached_token` because it is borrowed
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cssparser-0.24.1/src/parser.rs:572:17
[INFO] [stderr]     |
[INFO] [stderr] 547 |     pub fn next_including_whitespace_and_comments(&mut self) -> Result<&Token<'i>, BasicParseError<'i>> {
[INFO] [stderr]     |                                                   - let's call the lifetime of this reference `'1`
[INFO] [stderr] ...
[INFO] [stderr] 560 |             Some(ref cached_token)
[INFO] [stderr]     |                  ---------------- borrow of `self.input.cached_token` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 572 |                 self.input.cached_token = Some(CachedToken {
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^ assignment to borrowed `self.input.cached_token` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 584 |         Ok(token)
[INFO] [stderr]     |         --------- returning this value requires that `self.input.cached_token.0` is borrowed for `'1`
[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 reqwest v0.9.19
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling scraper v0.9.2
[INFO] [stderr]    Compiling howto v0.2.1
[INFO] [stderr]    Compiling howto-cli v0.2.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.66s
[INFO] running `"docker" "inspect" "bb0f3cd9ff2f9bcedacba193b8a610a7fab90b20a2d68d96b6c2d4ec88b5058e"`
[INFO] running `"docker" "rm" "-f" "bb0f3cd9ff2f9bcedacba193b8a610a7fab90b20a2d68d96b6c2d4ec88b5058e"`
[INFO] [stdout] bb0f3cd9ff2f9bcedacba193b8a610a7fab90b20a2d68d96b6c2d4ec88b5058e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/howto-cli/0.2.0:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3f5416e81ae5e60a78b18bf5bfd074d0b426f733f0ea7ce828d55a4e0f474d3f
[INFO] running `"docker" "start" "-a" "3f5416e81ae5e60a78b18bf5bfd074d0b426f733f0ea7ce828d55a4e0f474d3f"`
[INFO] [stderr]    Compiling howto-cli v0.2.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.41s
[INFO] running `"docker" "inspect" "3f5416e81ae5e60a78b18bf5bfd074d0b426f733f0ea7ce828d55a4e0f474d3f"`
[INFO] running `"docker" "rm" "-f" "3f5416e81ae5e60a78b18bf5bfd074d0b426f733f0ea7ce828d55a4e0f474d3f"`
[INFO] [stdout] 3f5416e81ae5e60a78b18bf5bfd074d0b426f733f0ea7ce828d55a4e0f474d3f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/howto-cli/0.2.0:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] d1cd58710d385c3be0a1fd6b29ce22b780ce939661987e495c846f8a5a2a1161
[INFO] running `"docker" "start" "-a" "d1cd58710d385c3be0a1fd6b29ce22b780ce939661987e495c846f8a5a2a1161"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/howto-4c498f696010cd91
[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" "d1cd58710d385c3be0a1fd6b29ce22b780ce939661987e495c846f8a5a2a1161"`
[INFO] running `"docker" "rm" "-f" "d1cd58710d385c3be0a1fd6b29ce22b780ce939661987e495c846f8a5a2a1161"`
[INFO] [stdout] d1cd58710d385c3be0a1fd6b29ce22b780ce939661987e495c846f8a5a2a1161