[INFO] fetching crate mcai-workers 0.0.4...
[INFO] checking mcai-workers-0.0.4 against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] extracting crate mcai-workers 0.0.4 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate mcai-workers 0.0.4 on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mcai-workers 0.0.4
[INFO] finished tweaking crates.io crate mcai-workers 0.0.4
[INFO] tweaked toml for crates.io crate mcai-workers 0.0.4 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate mcai-workers 0.0.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fb080a319ec1578c4bd17e7aaff549c9472ea7d4b15baadd8ee4b6d68b2d13b8
[INFO] running `Command { std: "docker" "start" "-a" "fb080a319ec1578c4bd17e7aaff549c9472ea7d4b15baadd8ee4b6d68b2d13b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb080a319ec1578c4bd17e7aaff549c9472ea7d4b15baadd8ee4b6d68b2d13b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb080a319ec1578c4bd17e7aaff549c9472ea7d4b15baadd8ee4b6d68b2d13b8", kill_on_drop: false }`
[INFO] [stdout] fb080a319ec1578c4bd17e7aaff549c9472ea7d4b15baadd8ee4b6d68b2d13b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9f7b31c53da8e31c59f676b465e3f0aa766f6694f35fae949e416e4cc9a5a664
[INFO] running `Command { std: "docker" "start" "-a" "9f7b31c53da8e31c59f676b465e3f0aa766f6694f35fae949e416e4cc9a5a664", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]     Checking backtrace v0.3.53
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking console v0.13.0
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]     Checking webpki v0.19.1
[INFO] [stderr]     Checking sct v0.5.0
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[INFO] [stderr]     Checking rustls v0.15.2
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[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/h2-0.1.26/src/hpack/header.rs:69:41
[INFO] [stdout]    |
[INFO] [stdout] 69 |                     let value = String::try_from(value)?;
[INFO] [stdout]    |                                         ^^^^^^^^ multiple `try_from` found
[INFO] [stdout]    |
[INFO] [stdout]    = note: candidate #1 is defined in an impl of the trait `std::convert::TryFrom` for the type `T`
[INFO] [stdout]    = note: candidate #2 is defined in an impl of the trait `string::TryFrom` for the type `string::String<T>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]    |
[INFO] [stdout] 69 |                     let value = std::convert::TryFrom::try_from(value)?;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]    |
[INFO] [stdout] 69 |                     let value = string::TryFrom::try_from(value)?;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/h2-0.1.26/src/hpack/header.rs:77:41
[INFO] [stdout]    |
[INFO] [stdout] 77 |                     let value = String::try_from(value)?;
[INFO] [stdout]    |                                         ^^^^^^^^ multiple `try_from` found
[INFO] [stdout]    |
[INFO] [stdout]    = note: candidate #1 is defined in an impl of the trait `std::convert::TryFrom` for the type `T`
[INFO] [stdout]    = note: candidate #2 is defined in an impl of the trait `string::TryFrom` for the type `string::String<T>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]    |
[INFO] [stdout] 77 |                     let value = std::convert::TryFrom::try_from(value)?;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]    |
[INFO] [stdout] 77 |                     let value = string::TryFrom::try_from(value)?;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/h2-0.1.26/src/hpack/header.rs:81:41
[INFO] [stdout]    |
[INFO] [stdout] 81 |                     let value = String::try_from(value)?;
[INFO] [stdout]    |                                         ^^^^^^^^ multiple `try_from` found
[INFO] [stdout]    |
[INFO] [stdout]    = note: candidate #1 is defined in an impl of the trait `std::convert::TryFrom` for the type `T`
[INFO] [stdout]    = note: candidate #2 is defined in an impl of the trait `string::TryFrom` for the type `string::String<T>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]    |
[INFO] [stdout] 81 |                     let value = std::convert::TryFrom::try_from(value)?;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]    |
[INFO] [stdout] 81 |                     let value = string::TryFrom::try_from(value)?;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/h2-0.1.26/src/hpack/header.rs:240:61
[INFO] [stdout]     |
[INFO] [stdout] 240 |             Name::Authority => Ok(Header::Authority(String::try_from(value)?)),
[INFO] [stdout]     |                                                             ^^^^^^^^ multiple `try_from` found
[INFO] [stdout]     |
[INFO] [stdout]     = note: candidate #1 is defined in an impl of the trait `std::convert::TryFrom` for the type `T`
[INFO] [stdout]     = note: candidate #2 is defined in an impl of the trait `string::TryFrom` for the type `string::String<T>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]     |
[INFO] [stdout] 240 |             Name::Authority => Ok(Header::Authority(std::convert::TryFrom::try_from(value)?)),
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 240 |             Name::Authority => Ok(Header::Authority(string::TryFrom::try_from(value)?)),
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/h2-0.1.26/src/hpack/header.rs:242:55
[INFO] [stdout]     |
[INFO] [stdout] 242 |             Name::Scheme => Ok(Header::Scheme(String::try_from(value)?)),
[INFO] [stdout]     |                                                       ^^^^^^^^ multiple `try_from` found
[INFO] [stdout]     |
[INFO] [stdout]     = note: candidate #1 is defined in an impl of the trait `std::convert::TryFrom` for the type `T`
[INFO] [stdout]     = note: candidate #2 is defined in an impl of the trait `string::TryFrom` for the type `string::String<T>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]     |
[INFO] [stdout] 242 |             Name::Scheme => Ok(Header::Scheme(std::convert::TryFrom::try_from(value)?)),
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 242 |             Name::Scheme => Ok(Header::Scheme(string::TryFrom::try_from(value)?)),
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/h2-0.1.26/src/hpack/header.rs:243:51
[INFO] [stdout]     |
[INFO] [stdout] 243 |             Name::Path => Ok(Header::Path(String::try_from(value)?)),
[INFO] [stdout]     |                                                   ^^^^^^^^ multiple `try_from` found
[INFO] [stdout]     |
[INFO] [stdout]     = note: candidate #1 is defined in an impl of the trait `std::convert::TryFrom` for the type `T`
[INFO] [stdout]     = note: candidate #2 is defined in an impl of the trait `string::TryFrom` for the type `string::String<T>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]     |
[INFO] [stdout] 243 |             Name::Path => Ok(Header::Path(std::convert::TryFrom::try_from(value)?)),
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 243 |             Name::Path => Ok(Header::Path(string::TryFrom::try_from(value)?)),
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `h2`
[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" "9f7b31c53da8e31c59f676b465e3f0aa766f6694f35fae949e416e4cc9a5a664", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f7b31c53da8e31c59f676b465e3f0aa766f6694f35fae949e416e4cc9a5a664", kill_on_drop: false }`
[INFO] [stdout] 9f7b31c53da8e31c59f676b465e3f0aa766f6694f35fae949e416e4cc9a5a664