[INFO] cloning repository dcrankshaw/rpc-perf-tuning
[INFO] running `"git" "clone" "--bare" "git://github.com/dcrankshaw/rpc-perf-tuning.git" "work/cache/sources/gh/dcrankshaw/rpc-perf-tuning"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/dcrankshaw/rpc-perf-tuning'...
[INFO] running `"git" "clone" "work/cache/sources/gh/dcrankshaw/rpc-perf-tuning" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/dcrankshaw/rpc-perf-tuning"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/dcrankshaw/rpc-perf-tuning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dcrankshaw/rpc-perf-tuning" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/dcrankshaw/rpc-perf-tuning"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/dcrankshaw/rpc-perf-tuning'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e55de2de36444c70e67ce20ecdbfd528eb22a3d0
[INFO] sha for GitHub repo dcrankshaw/rpc-perf-tuning: e55de2de36444c70e67ce20ecdbfd528eb22a3d0
[INFO] validating manifest of dcrankshaw/rpc-perf-tuning on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dcrankshaw/rpc-perf-tuning on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dcrankshaw/rpc-perf-tuning
[INFO] finished frobbing dcrankshaw/rpc-perf-tuning
[INFO] frobbed toml for dcrankshaw/rpc-perf-tuning written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/dcrankshaw/rpc-perf-tuning/Cargo.toml
[INFO] started frobbing dcrankshaw/rpc-perf-tuning
[INFO] finished frobbing dcrankshaw/rpc-perf-tuning
[INFO] frobbed toml for dcrankshaw/rpc-perf-tuning written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/dcrankshaw/rpc-perf-tuning/Cargo.toml
[INFO] crate dcrankshaw/rpc-perf-tuning already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/dcrankshaw/rpc-perf-tuning/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] testing dcrankshaw/rpc-perf-tuning against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-6/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/dcrankshaw/rpc-perf-tuning:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] e7c8b9405efc2ec7ec744327a664ba3e5d634b24254a8c19ccaafff5bbd180df
[INFO] running `"docker" "start" "-a" "e7c8b9405efc2ec7ec744327a664ba3e5d634b24254a8c19ccaafff5bbd180df"`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/src/main.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling rpc-perf-tuning v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]  --> src/server.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::time::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/server.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]  --> src/rpc.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::time::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/rpc.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `SHUTDOWN_CODE`
[INFO] [stderr]   --> src/rpc.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | const SHUTDOWN_CODE: u8 = 0;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/server.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         stream.flush();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FIXEDINT_CODE`
[INFO] [stderr]   --> src/rpc.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const FIXEDINT_CODE: u8 = 1;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FIXEDBYTE_CODE`
[INFO] [stderr]   --> src/rpc.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | const FIXEDBYTE_CODE: u8 = 3;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARINT_CODE`
[INFO] [stderr]   --> src/rpc.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | const VARINT_CODE: u8 = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARFLOAT_CODE`
[INFO] [stderr]   --> src/rpc.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | const VARFLOAT_CODE: u8 = 5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARBYTE_CODE`
[INFO] [stderr]   --> src/rpc.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | const VARBYTE_CODE: u8 = 6;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `STRING_CODE`
[INFO] [stderr]   --> src/rpc.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | const STRING_CODE: u8 = 7;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/rpc.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |         stream.flush();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `message_size_bytes`
[INFO] [stderr]   --> src/client.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let message_size_bytes = args[2].parse::<usize>().unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_message_size_bytes`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `SHUTDOWN_CODE`
[INFO] [stderr]   --> src/client.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const SHUTDOWN_CODE: u8 = 0;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FIXEDINT_CODE`
[INFO] [stderr]   --> src/client.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | const FIXEDINT_CODE: u8 = 1;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FIXEDBYTE_CODE`
[INFO] [stderr]   --> src/client.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | const FIXEDBYTE_CODE: u8 = 3;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARINT_CODE`
[INFO] [stderr]   --> src/client.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | const VARINT_CODE: u8 = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARFLOAT_CODE`
[INFO] [stderr]   --> src/client.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | const VARFLOAT_CODE: u8 = 5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARBYTE_CODE`
[INFO] [stderr]   --> src/client.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | const VARBYTE_CODE: u8 = 6;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `STRING_CODE`
[INFO] [stderr]   --> src/client.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | const STRING_CODE: u8 = 7;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `send_messages`
[INFO] [stderr]   --> src/client.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn send_messages(num_messages: usize, message_size_bytes: usize) -> (u64, Vec<u64>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_message`
[INFO] [stderr]    --> src/client.rs:157:1
[INFO] [stderr]     |
[INFO] [stderr] 157 | fn gen_message(size: usize) -> Vec<u8> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.80s
[INFO] running `"docker" "inspect" "e7c8b9405efc2ec7ec744327a664ba3e5d634b24254a8c19ccaafff5bbd180df"`
[INFO] running `"docker" "rm" "-f" "e7c8b9405efc2ec7ec744327a664ba3e5d634b24254a8c19ccaafff5bbd180df"`
[INFO] [stdout] e7c8b9405efc2ec7ec744327a664ba3e5d634b24254a8c19ccaafff5bbd180df
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-6/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/dcrankshaw/rpc-perf-tuning:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] e95d28a3853fc91bb2d341481eb61f3dc5874ed98335c7dfb37582e127f904e8
[INFO] running `"docker" "start" "-a" "e95d28a3853fc91bb2d341481eb61f3dc5874ed98335c7dfb37582e127f904e8"`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/src/main.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling rpc-perf-tuning v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]  --> src/server.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::time::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/server.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]  --> src/rpc.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::time::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/rpc.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/server.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         stream.flush();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `SHUTDOWN_CODE`
[INFO] [stderr]   --> src/rpc.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | const SHUTDOWN_CODE: u8 = 0;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FIXEDINT_CODE`
[INFO] [stderr]   --> src/rpc.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const FIXEDINT_CODE: u8 = 1;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FIXEDBYTE_CODE`
[INFO] [stderr]   --> src/rpc.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | const FIXEDBYTE_CODE: u8 = 3;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARINT_CODE`
[INFO] [stderr]   --> src/rpc.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | const VARINT_CODE: u8 = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARFLOAT_CODE`
[INFO] [stderr]   --> src/rpc.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | const VARFLOAT_CODE: u8 = 5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARBYTE_CODE`
[INFO] [stderr]   --> src/rpc.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | const VARBYTE_CODE: u8 = 6;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `STRING_CODE`
[INFO] [stderr]   --> src/rpc.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | const STRING_CODE: u8 = 7;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/rpc.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |         stream.flush();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `message_size_bytes`
[INFO] [stderr]   --> src/client.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let message_size_bytes = args[2].parse::<usize>().unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_message_size_bytes`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `SHUTDOWN_CODE`
[INFO] [stderr]   --> src/client.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const SHUTDOWN_CODE: u8 = 0;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FIXEDINT_CODE`
[INFO] [stderr]   --> src/client.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | const FIXEDINT_CODE: u8 = 1;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FIXEDBYTE_CODE`
[INFO] [stderr]   --> src/client.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | const FIXEDBYTE_CODE: u8 = 3;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARINT_CODE`
[INFO] [stderr]   --> src/client.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | const VARINT_CODE: u8 = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARFLOAT_CODE`
[INFO] [stderr]   --> src/client.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | const VARFLOAT_CODE: u8 = 5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `VARBYTE_CODE`
[INFO] [stderr]   --> src/client.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | const VARBYTE_CODE: u8 = 6;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `STRING_CODE`
[INFO] [stderr]   --> src/client.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | const STRING_CODE: u8 = 7;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `send_messages`
[INFO] [stderr]   --> src/client.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn send_messages(num_messages: usize, message_size_bytes: usize) -> (u64, Vec<u64>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_message`
[INFO] [stderr]    --> src/client.rs:157:1
[INFO] [stderr]     |
[INFO] [stderr] 157 | fn gen_message(size: usize) -> Vec<u8> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.72s
[INFO] running `"docker" "inspect" "e95d28a3853fc91bb2d341481eb61f3dc5874ed98335c7dfb37582e127f904e8"`
[INFO] running `"docker" "rm" "-f" "e95d28a3853fc91bb2d341481eb61f3dc5874ed98335c7dfb37582e127f904e8"`
[INFO] [stdout] e95d28a3853fc91bb2d341481eb61f3dc5874ed98335c7dfb37582e127f904e8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-6/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/dcrankshaw/rpc-perf-tuning:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen"`
[INFO] [stdout] d8da15ab6d9d537a1afb3866335d1b007b14f39446240ed6ee4146cf62daf255
[INFO] running `"docker" "start" "-a" "d8da15ab6d9d537a1afb3866335d1b007b14f39446240ed6ee4146cf62daf255"`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/src/main.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/client-1d77f3059a77a50f
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/clippermw-0cb92e8cb854adaa
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/server-09814a72995fa000
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d8da15ab6d9d537a1afb3866335d1b007b14f39446240ed6ee4146cf62daf255"`
[INFO] running `"docker" "rm" "-f" "d8da15ab6d9d537a1afb3866335d1b007b14f39446240ed6ee4146cf62daf255"`
[INFO] [stdout] d8da15ab6d9d537a1afb3866335d1b007b14f39446240ed6ee4146cf62daf255