[INFO] updating cached repository kesselborn/rsdocs2docset
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kesselborn/rsdocs2docset
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kesselborn/rsdocs2docset" "work/ex/beta-1.38-1/sources/1.37.0/gh/kesselborn/rsdocs2docset"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/kesselborn/rsdocs2docset'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kesselborn/rsdocs2docset" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kesselborn/rsdocs2docset"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kesselborn/rsdocs2docset'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f4290060d73125fbe5f058aa2b56f2903a7dd670
[INFO] sha for GitHub repo kesselborn/rsdocs2docset: f4290060d73125fbe5f058aa2b56f2903a7dd670
[INFO] validating manifest of kesselborn/rsdocs2docset 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 kesselborn/rsdocs2docset 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 kesselborn/rsdocs2docset
[INFO] finished frobbing kesselborn/rsdocs2docset
[INFO] frobbed toml for kesselborn/rsdocs2docset written to work/ex/beta-1.38-1/sources/1.37.0/gh/kesselborn/rsdocs2docset/Cargo.toml
[INFO] started frobbing kesselborn/rsdocs2docset
[INFO] finished frobbing kesselborn/rsdocs2docset
[INFO] frobbed toml for kesselborn/rsdocs2docset written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kesselborn/rsdocs2docset/Cargo.toml
[INFO] crate kesselborn/rsdocs2docset 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 kesselborn/rsdocs2docset 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kesselborn/rsdocs2docset:/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] e97bad19243933d2dde8c2960ebec9f96c238a8098e7d5d4047e87a0cb406c3e
[INFO] running `"docker" "start" "-a" "e97bad19243933d2dde8c2960ebec9f96c238a8098e7d5d4047e87a0cb406c3e"`
[INFO] [stderr]    Compiling quote v0.3.10
[INFO] [stderr]    Compiling mac v0.0.2
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling thread-id v3.0.0
[INFO] [stderr]    Compiling sqlite3-src v0.2.4
[INFO] [stderr]    Compiling utf-8 v0.6.0
[INFO] [stderr]    Compiling phf_generator v0.7.20
[INFO] [stderr]    Compiling url v1.2.4
[INFO] [stderr]    Compiling futf v0.1.2
[INFO] [stderr]    Compiling string_cache_codegen v0.3.1
[INFO] [stderr]    Compiling phf_codegen v0.7.20
[INFO] [stderr]    Compiling thread_local v0.3.2
[INFO] [stderr]    Compiling aho-corasick v0.6.1
[INFO] [stderr]    Compiling tendril v0.2.3
[INFO] [stderr]    Compiling syn v0.10.6
[INFO] [stderr]    Compiling sqlite3-sys v0.11.1
[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-1.2.4/src/form_urlencoded.rs:246:40
[INFO] [stderr]     |
[INFO] [stderr] 244 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 245 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 246 |     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 sqlite v0.23.2
[INFO] [stderr]    Compiling regex v0.2.1
[INFO] [stderr]    Compiling string_cache v0.3.0
[INFO] [stderr]    Compiling html5ever-atoms v0.1.3
[INFO] [stderr]    Compiling html5ever v0.12.1
[INFO] [stderr]    Compiling rsdocs2docset v0.4.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/dom/manipulator.rs:6:23
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn add_dash_links(mut dom: &mut RcDom, entries: &[Option<Entry>]) {
[INFO] [stderr]   |                       ----^^^
[INFO] [stderr]   |                       |
[INFO] [stderr]   |                       help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.17s
[INFO] running `"docker" "inspect" "e97bad19243933d2dde8c2960ebec9f96c238a8098e7d5d4047e87a0cb406c3e"`
[INFO] running `"docker" "rm" "-f" "e97bad19243933d2dde8c2960ebec9f96c238a8098e7d5d4047e87a0cb406c3e"`
[INFO] [stdout] e97bad19243933d2dde8c2960ebec9f96c238a8098e7d5d4047e87a0cb406c3e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kesselborn/rsdocs2docset:/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] fb83b18aff19c950b475798950ebbc1f596666f2ea473f8ea995526362f49371
[INFO] running `"docker" "start" "-a" "fb83b18aff19c950b475798950ebbc1f596666f2ea473f8ea995526362f49371"`
[INFO] [stderr]    Compiling rsdocs2docset v0.4.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/dom/manipulator.rs:6:23
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn add_dash_links(mut dom: &mut RcDom, entries: &[Option<Entry>]) {
[INFO] [stderr]   |                       ----^^^
[INFO] [stderr]   |                       |
[INFO] [stderr]   |                       help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.59s
[INFO] running `"docker" "inspect" "fb83b18aff19c950b475798950ebbc1f596666f2ea473f8ea995526362f49371"`
[INFO] running `"docker" "rm" "-f" "fb83b18aff19c950b475798950ebbc1f596666f2ea473f8ea995526362f49371"`
[INFO] [stdout] fb83b18aff19c950b475798950ebbc1f596666f2ea473f8ea995526362f49371
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kesselborn/rsdocs2docset:/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] 74fdcc02b567ed48b96ff72abadb82290714d87d26ede997f9eee1ea6ce2c73a
[INFO] running `"docker" "start" "-a" "74fdcc02b567ed48b96ff72abadb82290714d87d26ede997f9eee1ea6ce2c73a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rsdocs2docset-cf43b8d517290bdf
[INFO] [stdout] 
[INFO] [stdout] running 23 tests
[INFO] [stdout] test dom::manipulator_tests::it_inserts_dash_anchor_before_module_entry ... ok
[INFO] [stdout] test dom::manipulator_tests::it_inserts_dash_anchor_before_macro_entry ... ok
[INFO] [stdout] test dom::manipulator_tests::it_inserts_dash_anchor_before_method_entry ... ok
[INFO] [stdout] test dom::manipulator_tests::it_inserts_dash_anchor_before_enum_entry ... ok
[INFO] [stdout] test dom::manipulator_tests::it_inserts_dash_anchor_before_const_entry ... ok
[INFO] [stdout] test dom::manipulator_tests::it_inserts_dash_anchor_before_function_entry ... ok
[INFO] [stdout] test dom::manipulator_tests::it_inserts_dash_anchor_before_trait_entry ... ok
[INFO] [stdout] test dom::manipulator_tests::it_inserts_dash_anchor_before_struct_entry ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_const_entry_correctly ... ok
[INFO] [stdout] test dom::manipulator_tests::it_inserts_dash_anchor_before_type_entry ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_module_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_struct_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_enum_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_enum_method_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_trait_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_function_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_impl_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_trait_method_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_struct_method_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_variants_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_type_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_macro_entry_correctly ... ok
[INFO] [stdout] test dom::parser_tests::it_extracts_field_entry_correctly ... ok
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rsdocs2docset-6778e64f08ac2080
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rsdocs2docset
[INFO] [stdout] test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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] [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" "74fdcc02b567ed48b96ff72abadb82290714d87d26ede997f9eee1ea6ce2c73a"`
[INFO] running `"docker" "rm" "-f" "74fdcc02b567ed48b96ff72abadb82290714d87d26ede997f9eee1ea6ce2c73a"`
[INFO] [stdout] 74fdcc02b567ed48b96ff72abadb82290714d87d26ede997f9eee1ea6ce2c73a