[INFO] updating cached repository metasyn/show-scraper
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/metasyn/show-scraper
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/metasyn/show-scraper" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/metasyn/show-scraper"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/metasyn/show-scraper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/metasyn/show-scraper" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/metasyn/show-scraper"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/metasyn/show-scraper'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ee3db9c053af8963d59d443ce4e8f69a49e54658
[INFO] sha for GitHub repo metasyn/show-scraper: ee3db9c053af8963d59d443ce4e8f69a49e54658
[INFO] validating manifest of metasyn/show-scraper on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of metasyn/show-scraper on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing metasyn/show-scraper
[INFO] finished frobbing metasyn/show-scraper
[INFO] frobbed toml for metasyn/show-scraper written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/metasyn/show-scraper/Cargo.toml
[INFO] started frobbing metasyn/show-scraper
[INFO] finished frobbing metasyn/show-scraper
[INFO] frobbed toml for metasyn/show-scraper written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/metasyn/show-scraper/Cargo.toml
[INFO] crate metasyn/show-scraper already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking metasyn/show-scraper against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-4/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/metasyn/show-scraper:/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=forbid" "-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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c3818fe71ecb6a6f3bf5c98c8b119bd7edc70225d560763f8ada2a9fffa67e2b
[INFO] running `"docker" "start" "-a" "c3818fe71ecb6a6f3bf5c98c8b119bd7edc70225d560763f8ada2a9fffa67e2b"`
[INFO] [stderr]    Compiling serde v1.0.87
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling serde_derive v1.0.87
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]     Checking tokio-reactor v0.1.8
[INFO] [stderr]    Compiling cssparser-macros v0.3.5
[INFO] [stderr]    Compiling selectors v0.20.0
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking crossbeam v0.6.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.11
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling string_cache v0.6.2
[INFO] [stderr]    Compiling markup5ever v0.3.2
[INFO] [stderr]     Checking cssparser v0.24.1
[INFO] [stderr]     Checking tokio v0.1.15
[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]     Checking hyper v0.12.23
[INFO] [stderr]     Checking hyper-tls v0.3.1
[INFO] [stderr]     Checking serde_urlencoded v0.5.4
[INFO] [stderr]     Checking serde_json v1.0.38
[INFO] [stderr]     Checking reqwest v0.9.9
[INFO] [stderr]    Compiling markup5ever v0.7.5
[INFO] [stderr]     Checking html5ever v0.18.0
[INFO] [stderr]     Checking select v0.4.2
[INFO] [stderr]     Checking scraper v0.9.1
[INFO] [stderr]     Checking show-scraper v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io::prelude`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::io::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::io::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 50s
[INFO] running `"docker" "inspect" "c3818fe71ecb6a6f3bf5c98c8b119bd7edc70225d560763f8ada2a9fffa67e2b"`
[INFO] running `"docker" "rm" "-f" "c3818fe71ecb6a6f3bf5c98c8b119bd7edc70225d560763f8ada2a9fffa67e2b"`
[INFO] [stdout] c3818fe71ecb6a6f3bf5c98c8b119bd7edc70225d560763f8ada2a9fffa67e2b