[INFO] fetching crate mango-client 0.2.6...
[INFO] checking mango-client-0.2.6 against master#195ad4830e11a544391abe296b146450dea8411b for pr-82781
[INFO] extracting crate mango-client 0.2.6 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate mango-client 0.2.6 on toolchain 195ad4830e11a544391abe296b146450dea8411b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mango-client 0.2.6
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mango-client 0.2.6
[INFO] tweaked toml for crates.io crate mango-client 0.2.6 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate mango-client 0.2.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 365732698bb3d7186c958008c329312271681271848b9addb945925ce6c627f1
[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" "365732698bb3d7186c958008c329312271681271848b9addb945925ce6c627f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "365732698bb3d7186c958008c329312271681271848b9addb945925ce6c627f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "365732698bb3d7186c958008c329312271681271848b9addb945925ce6c627f1", kill_on_drop: false }`
[INFO] [stdout] 365732698bb3d7186c958008c329312271681271848b9addb945925ce6c627f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 308e9ba4876f6ac53035d79c2f6e5048ab49268d5ce65b6cad99f6f4db2c9fbe
[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" "308e9ba4876f6ac53035d79c2f6e5048ab49268d5ce65b6cad99f6f4db2c9fbe", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling pkg-config v0.3.18
[INFO] [stderr]    Compiling cc v1.0.58
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.7.1
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking strerror v0.6.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stdout] error[E0495]: cannot infer an appropriate lifetime for borrow expression due to conflicting requirements
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/strerror-0.6.2/src/lib.rs:368:15
[INFO] [stdout]     |
[INFO] [stdout] 368 |         match &self.next {
[INFO] [stdout]     |               ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: first, the lifetime cannot outlive the anonymous lifetime defined on the method body at 367:13...
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/strerror-0.6.2/src/lib.rs:367:13
[INFO] [stdout]     |
[INFO] [stdout] 367 |     fn next(&mut self) -> Option<Self::Item> {
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout] note: ...so that reference does not outlive borrowed content
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/strerror-0.6.2/src/lib.rs:368:15
[INFO] [stdout]     |
[INFO] [stdout] 368 |         match &self.next {
[INFO] [stdout]     |               ^^^^^^^^^^
[INFO] [stdout] note: but, the lifetime must be valid for the lifetime `'a` as defined on the impl at 364:6...
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/strerror-0.6.2/src/lib.rs:364:6
[INFO] [stdout]     |
[INFO] [stdout] 364 | impl<'a> Iterator for Iter<'a> {
[INFO] [stdout]     |      ^^
[INFO] [stdout] note: ...so that the expression is assignable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/strerror-0.6.2/src/lib.rs:372:29
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 self.next = e.source();
[INFO] [stdout]     |                             ^^^^^^^^^^
[INFO] [stdout]     = note: expected `Option<&'a (dyn std::error::Error + 'static)>`
[INFO] [stdout]                found `Option<&(dyn std::error::Error + 'static)>`
[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 E0495`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `strerror`
[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" "308e9ba4876f6ac53035d79c2f6e5048ab49268d5ce65b6cad99f6f4db2c9fbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "308e9ba4876f6ac53035d79c2f6e5048ab49268d5ce65b6cad99f6f4db2c9fbe", kill_on_drop: false }`
[INFO] [stdout] 308e9ba4876f6ac53035d79c2f6e5048ab49268d5ce65b6cad99f6f4db2c9fbe