[INFO] cloning repository https://github.com/jacklund/matrix-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jacklund/matrix-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacklund%2Fmatrix-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacklund%2Fmatrix-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 86f601e3d56b33d42cb65c12a4e415f893b833cd
[INFO] checking jacklund/matrix-rs against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacklund%2Fmatrix-rs" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jacklund/matrix-rs on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jacklund/matrix-rs
[INFO] finished tweaking git repo https://github.com/jacklund/matrix-rs
[INFO] tweaked toml for git repo https://github.com/jacklund/matrix-rs written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/jacklund/matrix-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 513b3d11c63db040e13e3b1ee72ac217e37bc0bdcf77918484c4b38ba43c4abf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "513b3d11c63db040e13e3b1ee72ac217e37bc0bdcf77918484c4b38ba43c4abf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "513b3d11c63db040e13e3b1ee72ac217e37bc0bdcf77918484c4b38ba43c4abf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "513b3d11c63db040e13e3b1ee72ac217e37bc0bdcf77918484c4b38ba43c4abf", kill_on_drop: false }`
[INFO] [stdout] 513b3d11c63db040e13e3b1ee72ac217e37bc0bdcf77918484c4b38ba43c4abf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4b3e2f995fb3de0179bb4d7b1b3ce7a73d1f30f8a01b1d8cd028a12eb8345efd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4b3e2f995fb3de0179bb4d7b1b3ce7a73d1f30f8a01b1d8cd028a12eb8345efd", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling unicode-normalization v0.1.3
[INFO] [stderr]    Compiling log v0.3.6
[INFO] [stderr]     Checking serde v0.8.21
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]     Checking traitobject v0.0.1
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]     Checking regex-syntax v0.4.0
[INFO] [stderr]     Checking lazy_static v0.1.16
[INFO] [stderr]    Compiling syn v0.10.5
[INFO] [stderr]     Checking unicode-bidi v0.2.4
[INFO] [stderr]     Checking hpack v0.2.0
[INFO] [stderr]     Checking mime v0.2.2
[INFO] [stderr]    Compiling rocket_codegen v0.1.4
[INFO] [stderr]     Checking num_cpus v1.2.0
[INFO] [stderr]     Checking thread-id v3.0.0
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking unreachable v0.1.1
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking solicit v0.4.4
[INFO] [stderr]     Checking aho-corasick v0.6.1
[INFO] [stderr]     Checking thread_local v0.3.2
[INFO] [stderr]    Compiling idna v0.1.0
[INFO] [stderr]     Checking regex v0.2.1
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking term v0.4.4
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.3
[INFO] [stderr]    Compiling term-painter v0.2.3
[INFO] [stderr]    Compiling serde_codegen v0.8.21
[INFO] [stderr]    Compiling url v1.2.4
[INFO] [stderr]     Checking serde_json v0.8.4
[INFO] [stderr]     Checking serde_test v0.8.21
[INFO] [stderr]     Checking toml v0.2.1
[INFO] [stdout] error[E0713]: borrow may still be in use when destructor runs
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.2.4/src/form_urlencoded.rs:246:40
[INFO] [stdout]     |
[INFO] [stdout] 244 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stdout]     |      -- lifetime `'a` defined here
[INFO] [stdout] 245 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stdout] 246 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stdout]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stdout]     |                                        |
[INFO] [stdout]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0713]: borrow may still be in use when destructor runs
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.2.4/src/form_urlencoded.rs:246:40
[INFO] [stdout]     |
[INFO] [stdout] 244 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stdout]     |      -- lifetime `'a` defined here
[INFO] [stdout] 245 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stdout] 246 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stdout]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stdout]     |                                        |
[INFO] [stdout]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0713`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0713`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `url`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4b3e2f995fb3de0179bb4d7b1b3ce7a73d1f30f8a01b1d8cd028a12eb8345efd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b3e2f995fb3de0179bb4d7b1b3ce7a73d1f30f8a01b1d8cd028a12eb8345efd", kill_on_drop: false }`
[INFO] [stdout] 4b3e2f995fb3de0179bb4d7b1b3ce7a73d1f30f8a01b1d8cd028a12eb8345efd