[INFO] fetching crate rpc_pb 0.19.0...
[INFO] checking rpc_pb-0.19.0 against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] extracting crate rpc_pb 0.19.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate rpc_pb 0.19.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate rpc_pb 0.19.0
[INFO] tweaked toml for crates.io crate rpc_pb 0.19.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rpc_pb 0.19.0 on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rpc_pb 0.19.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4788dc1775ad2645c2f5442a8d5bff79f2686669a0bd769647e74e6d5cbf06f5
[INFO] running `Command { std: "docker" "start" "-a" "4788dc1775ad2645c2f5442a8d5bff79f2686669a0bd769647e74e6d5cbf06f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4788dc1775ad2645c2f5442a8d5bff79f2686669a0bd769647e74e6d5cbf06f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4788dc1775ad2645c2f5442a8d5bff79f2686669a0bd769647e74e6d5cbf06f5", kill_on_drop: false }`
[INFO] [stdout] 4788dc1775ad2645c2f5442a8d5bff79f2686669a0bd769647e74e6d5cbf06f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ea1ccab7d100043a38508b2824978f0a7b11e4ee109fd4c3c261e3d8135331a
[INFO] running `Command { std: "docker" "start" "-a" "8ea1ccab7d100043a38508b2824978f0a7b11e4ee109fd4c3c261e3d8135331a", kill_on_drop: false }`
[INFO] [stderr]    Compiling buffertk v0.16.0
[INFO] [stderr]     Checking zerror v0.10.0
[INFO] [stderr]    Compiling semver v1.0.28
[INFO] [stderr]     Checking sig_fig_histogram v0.8.0
[INFO] [stderr]    Compiling libc v0.2.185
[INFO] [stderr]     Checking getopts v0.2.24
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking biometrics v0.14.0
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling crc32c v0.6.8
[INFO] [stderr]     Checking utilz v0.9.0
[INFO] [stderr]    Compiling derive_util v0.7.0
[INFO] [stderr]    Compiling prototk_derive v0.16.0
[INFO] [stderr]    Compiling arrrg_derive v0.10.0
[INFO] [stderr]    Compiling zerror_derive v0.9.0
[INFO] [stderr]     Checking arrrg v0.10.0
[INFO] [stderr]     Checking guacamole v0.16.0
[INFO] [stderr]     Checking prototk v0.17.0
[INFO] [stderr]     Checking one_two_eight v0.14.0
[INFO] [stderr]     Checking tatl v0.17.0
[INFO] [stderr]     Checking zerror_core v0.17.0
[INFO] [stderr]     Checking indicio v0.16.0
[INFO] [stderr]     Checking rpc_pb v0.19.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `ServerRegistry` is never constructed
[INFO] [stdout]    --> src/lib.rs:646:12
[INFO] [stdout]     |
[INFO] [stdout] 646 | pub struct ServerRegistry {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]     = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `ServerRegistry` is never constructed
[INFO] [stdout]    --> src/lib.rs:646:12
[INFO] [stdout]     |
[INFO] [stdout] 646 | pub struct ServerRegistry {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]     = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rpc_pb` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `rpc_pb` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "8ea1ccab7d100043a38508b2824978f0a7b11e4ee109fd4c3c261e3d8135331a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ea1ccab7d100043a38508b2824978f0a7b11e4ee109fd4c3c261e3d8135331a", kill_on_drop: false }`
[INFO] [stdout] 8ea1ccab7d100043a38508b2824978f0a7b11e4ee109fd4c3c261e3d8135331a
