[INFO] cloning repository https://github.com/hicqu/grpc-sys-learn
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hicqu/grpc-sys-learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhicqu%2Fgrpc-sys-learn"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhicqu%2Fgrpc-sys-learn'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f6ef1ff8629214bbfa3fb551d63543e036e4479c
[INFO] checking hicqu/grpc-sys-learn against try#1a399c10897767c36d147199696c96f193034e49 for pr-72644
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhicqu%2Fgrpc-sys-learn" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hicqu/grpc-sys-learn on toolchain 1a399c10897767c36d147199696c96f193034e49
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/hicqu/grpc-sys-learn
[INFO] removed path dependency grpcio from git repo https://github.com/hicqu/grpc-sys-learn
[INFO] removed path dependency grpcio-sys from git repo https://github.com/hicqu/grpc-sys-learn
[INFO] finished tweaking git repo https://github.com/hicqu/grpc-sys-learn
[INFO] tweaked toml for git repo https://github.com/hicqu/grpc-sys-learn written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/hicqu/grpc-sys-learn already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: dependency (grpcio) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (grpcio-sys) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: dependency (grpcio) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (grpcio-sys) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded grpcio v0.5.3
[INFO] [stderr]   Downloaded grpcio-sys v0.5.3
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bc93d6ff8147a85d2325fa0eb8b7443c9cec8c14eacc85dc2f20c27e7305c2d4
[INFO] running `"docker" "start" "-a" "bc93d6ff8147a85d2325fa0eb8b7443c9cec8c14eacc85dc2f20c27e7305c2d4"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: dependency (grpcio) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (grpcio-sys) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling bindgen v0.51.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]    Compiling protobuf v2.14.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling clang-sys v0.28.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking crossbeam-queue v0.2.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]    Compiling grpcio-sys v0.5.3
[INFO] [stderr]     Checking grpcio v0.5.3
[INFO] [stderr]     Checking grpc-sys-learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0603]: module `buf` is private
[INFO] [stderr]   --> src/server_context.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 | use grpcio::buf::{GrpcByteBuffer, GrpcByteBufferReader, GrpcSlice};
[INFO] [stderr]    |             ^^^ private module
[INFO] [stderr]    |
[INFO] [stderr] note: the module `buf` is defined here
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/grpcio-0.5.3/src/lib.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | mod buf;
[INFO] [stderr]    | ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `let_chains` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(let_chains)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr]   = note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Cursor`
[INFO] [stderr]  --> src/server_context.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::Cursor;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `AtomicUsize`, `Ordering`
[INFO] [stderr]  --> src/server_context.rs:4:25
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stderr]   |                         ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Receiver`, `SyncSender`, `TryRecvError`, `TrySendError`, `self`
[INFO] [stderr]  --> src/server_context.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::sync::mpsc::{self, Receiver, SyncSender, TryRecvError, TrySendError};
[INFO] [stderr]   |                       ^^^^  ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::Arc`
[INFO] [stderr]  --> src/server_context.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::sync::Arc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/server_context.rs:9:21
[INFO] [stderr]   |
[INFO] [stderr] 9 | use futures::task::{self, Task};
[INFO] [stderr]   |                     ^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0603]: module `buf` is private
[INFO] [stderr]   --> src/server_context.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 | use grpcio::buf::{GrpcByteBuffer, GrpcByteBufferReader, GrpcSlice};
[INFO] [stderr]    |             ^^^ private module
[INFO] [stderr]    |
[INFO] [stderr] note: the module `buf` is defined here
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/grpcio-0.5.3/src/lib.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | mod buf;
[INFO] [stderr]    | ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `let_chains` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(let_chains)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr]   = note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Cursor`
[INFO] [stderr]  --> src/server_context.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::Cursor;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `AtomicUsize`, `Ordering`
[INFO] [stderr]  --> src/server_context.rs:4:25
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stderr]   |                         ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Receiver`, `SyncSender`, `TryRecvError`, `TrySendError`, `self`
[INFO] [stderr]  --> src/server_context.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::sync::mpsc::{self, Receiver, SyncSender, TryRecvError, TrySendError};
[INFO] [stderr]   |                       ^^^^  ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::Arc`
[INFO] [stderr]  --> src/server_context.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::sync::Arc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/server_context.rs:9:21
[INFO] [stderr]   |
[INFO] [stderr] 9 | use futures::task::{self, Task};
[INFO] [stderr]   |                     ^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0282]: type annotations needed
[INFO] [stderr]   --> src/server_context.rs:74:19
[INFO] [stderr]    |
[INFO] [stderr] 74 |         requests: None,
[INFO] [stderr]    |                   ^^^^ cannot infer type for type parameter `T` declared on the enum `Option`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0282, E0603.
[INFO] [stderr] For more information about an error, try `rustc --explain E0282`.
[INFO] [stderr] error: could not compile `grpc-sys-learn`.
[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[E0282]: type annotations needed
[INFO] [stderr]   --> src/server_context.rs:74:19
[INFO] [stderr]    |
[INFO] [stderr] 74 |         requests: None,
[INFO] [stderr]    |                   ^^^^ cannot infer type for type parameter `T` declared on the enum `Option`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0282, E0603.
[INFO] [stderr] For more information about an error, try `rustc --explain E0282`.
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "bc93d6ff8147a85d2325fa0eb8b7443c9cec8c14eacc85dc2f20c27e7305c2d4"`
[INFO] running `"docker" "rm" "-f" "bc93d6ff8147a85d2325fa0eb8b7443c9cec8c14eacc85dc2f20c27e7305c2d4"`
[INFO] [stdout] bc93d6ff8147a85d2325fa0eb8b7443c9cec8c14eacc85dc2f20c27e7305c2d4