[INFO] fetching crate json-rpc2 0.11.1...
[INFO] testing json-rpc2-0.11.1 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate json-rpc2 0.11.1 into /workspace/builds/worker-7-tc2/source
[INFO] removed /workspace/builds/worker-7-tc2/source/rust-toolchain
[INFO] started tweaking crates.io crate json-rpc2 0.11.1
[INFO] finished tweaking crates.io crate json-rpc2 0.11.1
[INFO] tweaked toml for crates.io crate json-rpc2 0.11.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate json-rpc2 0.11.1 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate json-rpc2 0.11.1 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5cd7f1ce6f9b83d1acfaeff08a217c2f5bef085f6ec11cfb52df4a61a69be37
[INFO] running `Command { std: "docker" "start" "-a" "f5cd7f1ce6f9b83d1acfaeff08a217c2f5bef085f6ec11cfb52df4a61a69be37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5cd7f1ce6f9b83d1acfaeff08a217c2f5bef085f6ec11cfb52df4a61a69be37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5cd7f1ce6f9b83d1acfaeff08a217c2f5bef085f6ec11cfb52df4a61a69be37", kill_on_drop: false }`
[INFO] [stdout] f5cd7f1ce6f9b83d1acfaeff08a217c2f5bef085f6ec11cfb52df4a61a69be37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd1afb9b75ce78a36eb633de427bb52b9aa880583827a46ba928d7f94ea40537
[INFO] running `Command { std: "docker" "start" "-a" "bd1afb9b75ce78a36eb633de427bb52b9aa880583827a46ba928d7f94ea40537", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.88
[INFO] [stderr]    Compiling libc v0.2.120
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling ryu v1.0.9
[INFO] [stderr]    Compiling getrandom v0.2.5
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling json-rpc2 v0.11.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]   --> src/lib.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         data: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]   --> src/lib.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         data: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `id` is never read
[INFO] [stdout]    --> src/lib.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         id: Option<Value>,
[INFO] [stdout]     |         ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `id` is never read
[INFO] [stdout]    --> src/lib.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |         id: Option<Value>,
[INFO] [stdout]     |         ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]    --> src/lib.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         data: String,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MockError` is never used
[INFO] [stdout]    --> src/lib.rs:506:10
[INFO] [stdout]     |
[INFO] [stdout] 506 |     enum MockError {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HelloServiceHandler` is never constructed
[INFO] [stdout]    --> src/lib.rs:511:12
[INFO] [stdout]     |
[INFO] [stdout] 511 |     struct HelloServiceHandler;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InternalErrorService` is never constructed
[INFO] [stdout]    --> src/lib.rs:531:12
[INFO] [stdout]     |
[INFO] [stdout] 531 |     struct InternalErrorService;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InternalRpcErrorService` is never constructed
[INFO] [stdout]    --> src/lib.rs:546:12
[INFO] [stdout]     |
[INFO] [stdout] 546 |     struct InternalRpcErrorService;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.19s
[INFO] running `Command { std: "docker" "inspect" "bd1afb9b75ce78a36eb633de427bb52b9aa880583827a46ba928d7f94ea40537", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd1afb9b75ce78a36eb633de427bb52b9aa880583827a46ba928d7f94ea40537", kill_on_drop: false }`
[INFO] [stdout] bd1afb9b75ce78a36eb633de427bb52b9aa880583827a46ba928d7f94ea40537
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad3ac4df7a69e50e1b45e1d10fe8eff3225abb1adccd6f717cc86d1ec1900ce4
[INFO] running `Command { std: "docker" "start" "-a" "ad3ac4df7a69e50e1b45e1d10fe8eff3225abb1adccd6f717cc86d1ec1900ce4", kill_on_drop: false }`
[INFO] [stderr]    Compiling parking_lot_core v0.9.1
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling lock_api v0.4.6
[INFO] [stderr]    Compiling mio v0.8.1
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling socket2 v0.4.4
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.8
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling parking_lot v0.12.0
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]   --> src/lib.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         data: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]   --> src/lib.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         data: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `id` is never read
[INFO] [stdout]    --> src/lib.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         id: Option<Value>,
[INFO] [stdout]     |         ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `id` is never read
[INFO] [stdout]    --> src/lib.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |         id: Option<Value>,
[INFO] [stdout]     |         ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]    --> src/lib.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         data: String,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MockError` is never used
[INFO] [stdout]    --> src/lib.rs:506:10
[INFO] [stdout]     |
[INFO] [stdout] 506 |     enum MockError {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HelloServiceHandler` is never constructed
[INFO] [stdout]    --> src/lib.rs:511:12
[INFO] [stdout]     |
[INFO] [stdout] 511 |     struct HelloServiceHandler;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InternalErrorService` is never constructed
[INFO] [stdout]    --> src/lib.rs:531:12
[INFO] [stdout]     |
[INFO] [stdout] 531 |     struct InternalErrorService;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InternalRpcErrorService` is never constructed
[INFO] [stdout]    --> src/lib.rs:546:12
[INFO] [stdout]     |
[INFO] [stdout] 546 |     struct InternalRpcErrorService;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tokio v1.17.0
[INFO] [stderr]    Compiling json-rpc2 v0.11.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `json_rpc2::futures`
[INFO] [stdout]  --> examples/async.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use json_rpc2::{futures::*, Request, Response, Result};
[INFO] [stdout]   |                 ^^^^^^^ could not find `futures` in `json_rpc2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `async_trait`
[INFO] [stdout]  --> examples/async.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use async_trait::async_trait;
[INFO] [stdout]   |     ^^^^^^^^^^^ use of unresolved module or unlinked crate `async_trait`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `async_trait`, use `cargo add async_trait` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `async_trait`
[INFO] [stdout]  --> src/futures.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use async_trait::async_trait;
[INFO] [stdout]   |     ^^^^^^^^^^^ use of unresolved module or unlinked crate `async_trait`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `async_trait`, use `cargo add async_trait` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0038]: the trait `futures::Service` is not dyn compatible
[INFO] [stdout]   --> src/futures.rs:30:27
[INFO] [stdout]    |
[INFO] [stdout] 30 |     services: Vec<&'a Box<dyn Service<Data = T>>>,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^ `futures::Service` is not dyn compatible
[INFO] [stdout]    |
[INFO] [stdout] note: for a trait to be dyn compatible it needs to allow building a vtable
[INFO] [stdout]       for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
[INFO] [stdout]   --> src/futures.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub trait Service: Send + Sync {
[INFO] [stdout]    |           ------- this trait is not dyn compatible...
[INFO] [stdout] ...
[INFO] [stdout] 15 |     async fn handle(
[INFO] [stdout]    |              ^^^^^^ ...because method `handle` is `async`
[INFO] [stdout]    = help: consider moving `handle` to another trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `json-rpc2` (example "async") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0038]: the trait `futures::Service` is not dyn compatible
[INFO] [stdout]   --> src/futures.rs:35:38
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn new(services: Vec<&'a Box<dyn Service<Data = T>>>) -> Self {
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^^^ `futures::Service` is not dyn compatible
[INFO] [stdout]    |
[INFO] [stdout] note: for a trait to be dyn compatible it needs to allow building a vtable
[INFO] [stdout]       for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
[INFO] [stdout]   --> src/futures.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub trait Service: Send + Sync {
[INFO] [stdout]    |           ------- this trait is not dyn compatible...
[INFO] [stdout] ...
[INFO] [stdout] 15 |     async fn handle(
[INFO] [stdout]    |              ^^^^^^ ...because method `handle` is `async`
[INFO] [stdout]    = help: consider moving `handle` to another trait
[INFO] [stdout] help: you might have meant to use `Self` to refer to the implementing type
[INFO] [stdout]    |
[INFO] [stdout] 35 -     pub fn new(services: Vec<&'a Box<dyn Service<Data = T>>>) -> Self {
[INFO] [stdout] 35 +     pub fn new(services: Vec<&'a Box<Self>>) -> Self {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0038]: the trait `futures::Service` is not dyn compatible
[INFO] [stdout]   --> src/futures.rs:48:24
[INFO] [stdout]    |
[INFO] [stdout] 48 |         for service in self.services.iter() {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^ `futures::Service` is not dyn compatible
[INFO] [stdout]    |
[INFO] [stdout] note: for a trait to be dyn compatible it needs to allow building a vtable
[INFO] [stdout]       for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
[INFO] [stdout]   --> src/futures.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub trait Service: Send + Sync {
[INFO] [stdout]    |           ------- this trait is not dyn compatible...
[INFO] [stdout] ...
[INFO] [stdout] 15 |     async fn handle(
[INFO] [stdout]    |              ^^^^^^ ...because method `handle` is `async`
[INFO] [stdout]    = help: consider moving `handle` to another trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0038]: the trait `futures::Service` is not dyn compatible
[INFO] [stdout]   --> src/futures.rs:36:16
[INFO] [stdout]    |
[INFO] [stdout] 36 |         Self { services }
[INFO] [stdout]    |                ^^^^^^^^ `futures::Service` is not dyn compatible
[INFO] [stdout]    |
[INFO] [stdout] note: for a trait to be dyn compatible it needs to allow building a vtable
[INFO] [stdout]       for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
[INFO] [stdout]   --> src/futures.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub trait Service: Send + Sync {
[INFO] [stdout]    |           ------- this trait is not dyn compatible...
[INFO] [stdout] ...
[INFO] [stdout] 15 |     async fn handle(
[INFO] [stdout]    |              ^^^^^^ ...because method `handle` is `async`
[INFO] [stdout]    = help: consider moving `handle` to another trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]   --> src/lib.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         data: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]   --> src/lib.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         data: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `id` is never read
[INFO] [stdout]    --> src/lib.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         id: Option<Value>,
[INFO] [stdout]     |         ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `id` is never read
[INFO] [stdout]    --> src/lib.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |         id: Option<Value>,
[INFO] [stdout]     |         ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]    --> src/lib.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         data: String,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0038, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0038`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `json-rpc2` (lib test) due to 5 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "ad3ac4df7a69e50e1b45e1d10fe8eff3225abb1adccd6f717cc86d1ec1900ce4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad3ac4df7a69e50e1b45e1d10fe8eff3225abb1adccd6f717cc86d1ec1900ce4", kill_on_drop: false }`
[INFO] [stdout] ad3ac4df7a69e50e1b45e1d10fe8eff3225abb1adccd6f717cc86d1ec1900ce4
