[INFO] updating cached repository erikjohnston/matrix-introspection
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/erikjohnston/matrix-introspection
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/erikjohnston/matrix-introspection" "work/ex/beta-1.37-6/sources/1.36.0/gh/erikjohnston/matrix-introspection"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/erikjohnston/matrix-introspection'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/erikjohnston/matrix-introspection" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/erikjohnston/matrix-introspection"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/erikjohnston/matrix-introspection'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5f03cf3f3b4a0fdc7ab64b3d2292f440e6880799
[INFO] sha for GitHub repo erikjohnston/matrix-introspection: 5f03cf3f3b4a0fdc7ab64b3d2292f440e6880799
[INFO] validating manifest of erikjohnston/matrix-introspection 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 erikjohnston/matrix-introspection 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 erikjohnston/matrix-introspection
[INFO] finished frobbing erikjohnston/matrix-introspection
[INFO] frobbed toml for erikjohnston/matrix-introspection written to work/ex/beta-1.37-6/sources/1.36.0/gh/erikjohnston/matrix-introspection/Cargo.toml
[INFO] started frobbing erikjohnston/matrix-introspection
[INFO] finished frobbing erikjohnston/matrix-introspection
[INFO] frobbed toml for erikjohnston/matrix-introspection written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/erikjohnston/matrix-introspection/Cargo.toml
[INFO] crate erikjohnston/matrix-introspection already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing erikjohnston/matrix-introspection against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/erikjohnston/matrix-introspection:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 52bf250fe98a7100918adf074f9632b62779ae0107203eb3e5c41567a01a96ef
[INFO] running `"docker" "start" "-a" "52bf250fe98a7100918adf074f9632b62779ae0107203eb3e5c41567a01a96ef"`
[INFO] [stderr]    Compiling serde v0.9.6
[INFO] [stderr]    Compiling bufstream v0.1.2
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling idna v0.1.0
[INFO] [stderr]    Compiling serde_codegen_internals v0.13.0
[INFO] [stderr]    Compiling postgres-protocol v0.2.0
[INFO] [stderr]    Compiling postgres-shared v0.1.1
[INFO] [stderr]    Compiling serde_derive v0.9.6
[INFO] [stderr]    Compiling url v1.4.0
[INFO] [stderr]    Compiling postgres v0.13.6
[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-1.4.0/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] 
[INFO] [stderr]    Compiling hyper v0.10.4
[INFO] [stderr]    Compiling serde_json v0.9.5
[INFO] [stderr]    Compiling hyper-router v0.1.0 (https://github.com/erikjohnston/rust-hyper-router#25e7f5af)
[INFO] [stderr]    Compiling viz-synapse v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.56s
[INFO] running `"docker" "inspect" "52bf250fe98a7100918adf074f9632b62779ae0107203eb3e5c41567a01a96ef"`
[INFO] running `"docker" "rm" "-f" "52bf250fe98a7100918adf074f9632b62779ae0107203eb3e5c41567a01a96ef"`
[INFO] [stdout] 52bf250fe98a7100918adf074f9632b62779ae0107203eb3e5c41567a01a96ef
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/erikjohnston/matrix-introspection:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] dbb62b7ff684b70a187acb5e51411fdbbdb5ebe40b4a1dc77d22e271acade495
[INFO] running `"docker" "start" "-a" "dbb62b7ff684b70a187acb5e51411fdbbdb5ebe40b4a1dc77d22e271acade495"`
[INFO] [stderr]    Compiling viz-synapse v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `"docker" "inspect" "dbb62b7ff684b70a187acb5e51411fdbbdb5ebe40b4a1dc77d22e271acade495"`
[INFO] running `"docker" "rm" "-f" "dbb62b7ff684b70a187acb5e51411fdbbdb5ebe40b4a1dc77d22e271acade495"`
[INFO] [stdout] dbb62b7ff684b70a187acb5e51411fdbbdb5ebe40b4a1dc77d22e271acade495
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/erikjohnston/matrix-introspection:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] fb15331e8e7349bc4cceb67c6629dc40a836d39d8091d63f0e4bb18c84cf0e50
[INFO] running `"docker" "start" "-a" "fb15331e8e7349bc4cceb67c6629dc40a836d39d8091d63f0e4bb18c84cf0e50"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/viz_synapse-5573f46fc9173bd3
[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" "fb15331e8e7349bc4cceb67c6629dc40a836d39d8091d63f0e4bb18c84cf0e50"`
[INFO] running `"docker" "rm" "-f" "fb15331e8e7349bc4cceb67c6629dc40a836d39d8091d63f0e4bb18c84cf0e50"`
[INFO] [stdout] fb15331e8e7349bc4cceb67c6629dc40a836d39d8091d63f0e4bb18c84cf0e50