[INFO] updating cached repository brimatteng/Learn-Rust---Hacker-News-Scraper [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/brimatteng/Learn-Rust---Hacker-News-Scraper [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/brimatteng/Learn-Rust---Hacker-News-Scraper" "work/ex/beta-1.38-1/sources/1.37.0/gh/brimatteng/Learn-Rust---Hacker-News-Scraper"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/brimatteng/Learn-Rust---Hacker-News-Scraper'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/brimatteng/Learn-Rust---Hacker-News-Scraper" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brimatteng/Learn-Rust---Hacker-News-Scraper"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brimatteng/Learn-Rust---Hacker-News-Scraper'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] fabc7e90997d7f4871ab9c02b4b67ea0e8bf9a2a [INFO] sha for GitHub repo brimatteng/Learn-Rust---Hacker-News-Scraper: fabc7e90997d7f4871ab9c02b4b67ea0e8bf9a2a [INFO] validating manifest of brimatteng/Learn-Rust---Hacker-News-Scraper 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 brimatteng/Learn-Rust---Hacker-News-Scraper 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 brimatteng/Learn-Rust---Hacker-News-Scraper [INFO] finished frobbing brimatteng/Learn-Rust---Hacker-News-Scraper [INFO] frobbed toml for brimatteng/Learn-Rust---Hacker-News-Scraper written to work/ex/beta-1.38-1/sources/1.37.0/gh/brimatteng/Learn-Rust---Hacker-News-Scraper/Cargo.toml [INFO] started frobbing brimatteng/Learn-Rust---Hacker-News-Scraper [INFO] finished frobbing brimatteng/Learn-Rust---Hacker-News-Scraper [INFO] frobbed toml for brimatteng/Learn-Rust---Hacker-News-Scraper written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brimatteng/Learn-Rust---Hacker-News-Scraper/Cargo.toml [INFO] crate brimatteng/Learn-Rust---Hacker-News-Scraper 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 brimatteng/Learn-Rust---Hacker-News-Scraper 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/brimatteng/Learn-Rust---Hacker-News-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=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] 2cf37dddab552adc53e694d06043941f6624b8d5a6beac370f7a6b98edfdeac9 [INFO] running `"docker" "start" "-a" "2cf37dddab552adc53e694d06043941f6624b8d5a6beac370f7a6b98edfdeac9"` [INFO] [stderr] Compiling version_check v0.1.2 [INFO] [stderr] Compiling openssl v0.9.14 [INFO] [stderr] Compiling libflate v0.1.8 [INFO] [stderr] Compiling colored v1.5.1 [INFO] [stderr] Compiling string_cache_codegen v0.3.1 [INFO] [stderr] Compiling openssl-sys v0.9.14 [INFO] [stderr] Compiling url v1.5.0 [INFO] [stderr] Compiling html5ever v0.14.1 [INFO] [stderr] Compiling unicase v1.4.2 [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-1.5.0/src/form_urlencoded.rs:251:40 [INFO] [stderr] | [INFO] [stderr] 249 | impl<'a> Target for ::UrlQuery<'a> { [INFO] [stderr] | -- lifetime `'a` defined here [INFO] [stderr] 250 | fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization } [INFO] [stderr] 251 | 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 string_cache v0.4.0 [INFO] [stderr] Compiling html5ever-atoms v0.2.2 [INFO] [stderr] Compiling hyper v0.10.12 [INFO] [stderr] Compiling serde_urlencoded v0.5.1 [INFO] [stderr] Compiling native-tls v0.1.2 [INFO] [stderr] Compiling hyper-native-tls v0.2.4 [INFO] [stderr] Compiling select v0.4.0 [INFO] [stderr] Compiling reqwest v0.6.2 [INFO] [stderr] Compiling hacker-news-reader v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:37:5 [INFO] [stderr] | [INFO] [stderr] 37 | resp.read_to_string(&mut content); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_must_use)] on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 40.96s [INFO] running `"docker" "inspect" "2cf37dddab552adc53e694d06043941f6624b8d5a6beac370f7a6b98edfdeac9"` [INFO] running `"docker" "rm" "-f" "2cf37dddab552adc53e694d06043941f6624b8d5a6beac370f7a6b98edfdeac9"` [INFO] [stdout] 2cf37dddab552adc53e694d06043941f6624b8d5a6beac370f7a6b98edfdeac9 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/brimatteng/Learn-Rust---Hacker-News-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=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] 137cbe7490ee44e5630595bdd56eabe087869debfa0239645ae379c730c1f8f6 [INFO] running `"docker" "start" "-a" "137cbe7490ee44e5630595bdd56eabe087869debfa0239645ae379c730c1f8f6"` [INFO] [stderr] Compiling hacker-news-reader v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:37:5 [INFO] [stderr] | [INFO] [stderr] 37 | resp.read_to_string(&mut content); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_must_use)] on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.24s [INFO] running `"docker" "inspect" "137cbe7490ee44e5630595bdd56eabe087869debfa0239645ae379c730c1f8f6"` [INFO] running `"docker" "rm" "-f" "137cbe7490ee44e5630595bdd56eabe087869debfa0239645ae379c730c1f8f6"` [INFO] [stdout] 137cbe7490ee44e5630595bdd56eabe087869debfa0239645ae379c730c1f8f6 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/brimatteng/Learn-Rust---Hacker-News-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=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] c8c19ff11a7e52c4a9e2602aaac86f3e21906c687c05555609df6d196e12e29f [INFO] running `"docker" "start" "-a" "c8c19ff11a7e52c4a9e2602aaac86f3e21906c687c05555609df6d196e12e29f"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.08s [INFO] [stderr] Running /opt/crater/target/debug/deps/hacker_news_reader-be649614364f8811 [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" "c8c19ff11a7e52c4a9e2602aaac86f3e21906c687c05555609df6d196e12e29f"` [INFO] running `"docker" "rm" "-f" "c8c19ff11a7e52c4a9e2602aaac86f3e21906c687c05555609df6d196e12e29f"` [INFO] [stdout] c8c19ff11a7e52c4a9e2602aaac86f3e21906c687c05555609df6d196e12e29f