[INFO] updating cached repository https://github.com/tercen/rustson
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1e76b230626c13eaa6920cec0ab26d34273e15cc
[INFO] checking tercen/rustson against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftercen%2Frustson" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tercen/rustson on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/tercen/rustson
[INFO] finished tweaking git repo https://github.com/tercen/rustson
[INFO] tweaked toml for git repo https://github.com/tercen/rustson written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 5a1f63d5f36a25c94632766a7f41d48c8d13847a425fa9e48b87fc8319b0f011
[INFO] running `"docker" "start" "-a" "5a1f63d5f36a25c94632766a7f41d48c8d13847a425fa9e48b87fc8319b0f011"`
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking tokio-threadpool v0.1.16
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-reactor v0.1.10
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking tokio-udp v0.1.5
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]     Checking serde v1.0.101
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking rustson v0.2.10 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/deser.rs:96:37
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn read(&self, reader: &mut Reader) -> Result<Value> {
[INFO] [stderr]    |                                     ^^^^^^ help: use `dyn`: `dyn Reader`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/deser.rs:112:38
[INFO] [stderr]     |
[INFO] [stderr] 112 |     fn read_type(&self, reader: &mut Reader) -> Result<u8> {
[INFO] [stderr]     |                                      ^^^^^^ help: use `dyn`: `dyn Reader`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/deser.rs:116:37
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn read_len(&self, reader: &mut Reader) -> Result<usize> {
[INFO] [stderr]     |                                     ^^^^^^ help: use `dyn`: `dyn Reader`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/deser.rs:120:40
[INFO] [stderr]     |
[INFO] [stderr] 120 |     fn read_string(&self, reader: &mut Reader) -> Result<String> {
[INFO] [stderr]     |                                        ^^^^^^ help: use `dyn`: `dyn Reader`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/deser.rs:139:40
[INFO] [stderr]     |
[INFO] [stderr] 139 |     fn read_object(&self, reader: &mut Reader) -> Result<Value> {
[INFO] [stderr]     |                                        ^^^^^^ help: use `dyn`: `dyn Reader`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ser.rs:144:53
[INFO] [stderr]     |
[INFO] [stderr] 144 |     pub fn write(&self, value: &Value, writer: &mut Writer) -> Result<()> {
[INFO] [stderr]     |                                                     ^^^^^^ help: use `dyn`: `dyn Writer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ser.rs:149:51
[INFO] [stderr]     |
[INFO] [stderr] 149 |     fn add_object(&self, value: &Value, buf: &mut Writer) -> Result<()> {
[INFO] [stderr]     |                                                   ^^^^^^ help: use `dyn`: `dyn Writer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ser.rs:276:33
[INFO] [stderr]     |
[INFO] [stderr] 276 |     fn add_len(&self, buf: &mut Writer, len: usize) -> Result<()> {
[INFO] [stderr]     |                                 ^^^^^^ help: use `dyn`: `dyn Writer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ser.rs:283:36
[INFO] [stderr]     |
[INFO] [stderr] 283 |     fn add_string(&self, buf: &mut Writer, value: &str) -> Result<()> {
[INFO] [stderr]     |                                    ^^^^^^ help: use `dyn`: `dyn Writer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ser.rs:288:37
[INFO] [stderr]     |
[INFO] [stderr] 288 |     fn add_cstring(&self, buf: &mut Writer, value: &str) -> Result<()> {
[INFO] [stderr]     |                                     ^^^^^^ help: use `dyn`: `dyn Writer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future::lazy`
[INFO] [stderr]   --> src/stream.rs:66:13
[INFO] [stderr]    |
[INFO] [stderr] 66 |         use futures::future::lazy;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::runtime::Runtime`
[INFO] [stderr]   --> src/stream.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |         use tokio::runtime::Runtime;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:54:32
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:59:34
[INFO] [stderr]    |
[INFO] [stderr] 59 |     fn source(&self) -> Option<&(error::Error + 'static)> { None }
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + 'static`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/deser.rs:96:37
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn read(&self, reader: &mut Reader) -> Result<Value> {
[INFO] [stderr]    |                                     ^^^^^^ help: use `dyn`: `dyn Reader`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/deser.rs:112:38
[INFO] [stderr]     |
[INFO] [stderr] 112 |     fn read_type(&self, reader: &mut Reader) -> Result<u8> {
[INFO] [stderr]     |                                      ^^^^^^ help: use `dyn`: `dyn Reader`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/deser.rs:116:37
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn read_len(&self, reader: &mut Reader) -> Result<usize> {
[INFO] [stderr]     |                                     ^^^^^^ help: use `dyn`: `dyn Reader`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/deser.rs:120:40
[INFO] [stderr]     |
[INFO] [stderr] 120 |     fn read_string(&self, reader: &mut Reader) -> Result<String> {
[INFO] [stderr]     |                                        ^^^^^^ help: use `dyn`: `dyn Reader`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/deser.rs:139:40
[INFO] [stderr]     |
[INFO] [stderr] 139 |     fn read_object(&self, reader: &mut Reader) -> Result<Value> {
[INFO] [stderr]     |                                        ^^^^^^ help: use `dyn`: `dyn Reader`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ser.rs:144:53
[INFO] [stderr]     |
[INFO] [stderr] 144 |     pub fn write(&self, value: &Value, writer: &mut Writer) -> Result<()> {
[INFO] [stderr]     |                                                     ^^^^^^ help: use `dyn`: `dyn Writer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ser.rs:149:51
[INFO] [stderr]     |
[INFO] [stderr] 149 |     fn add_object(&self, value: &Value, buf: &mut Writer) -> Result<()> {
[INFO] [stderr]     |                                                   ^^^^^^ help: use `dyn`: `dyn Writer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ser.rs:276:33
[INFO] [stderr]     |
[INFO] [stderr] 276 |     fn add_len(&self, buf: &mut Writer, len: usize) -> Result<()> {
[INFO] [stderr]     |                                 ^^^^^^ help: use `dyn`: `dyn Writer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ser.rs:283:36
[INFO] [stderr]     |
[INFO] [stderr] 283 |     fn add_string(&self, buf: &mut Writer, value: &str) -> Result<()> {
[INFO] [stderr]     |                                    ^^^^^^ help: use `dyn`: `dyn Writer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ser.rs:288:37
[INFO] [stderr]     |
[INFO] [stderr] 288 |     fn add_cstring(&self, buf: &mut Writer, value: &str) -> Result<()> {
[INFO] [stderr]     |                                     ^^^^^^ help: use `dyn`: `dyn Writer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:54:32
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:59:34
[INFO] [stderr]    |
[INFO] [stderr] 59 |     fn source(&self) -> Option<&(error::Error + 'static)> { None }
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + 'static`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/stream.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(max_buf_len: usize, value: &'v Value) -> SerializerStream<'v> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `encode_decode`
[INFO] [stderr]   --> src/stream.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn encode_decode(object: &Value) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/stream.rs:109:9
[INFO] [stderr]     |
[INFO] [stderr] 109 |         core.run(fut);
[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]     Finished dev [unoptimized + debuginfo] target(s) in 41.75s
[INFO] running `"docker" "inspect" "5a1f63d5f36a25c94632766a7f41d48c8d13847a425fa9e48b87fc8319b0f011"`
[INFO] running `"docker" "rm" "-f" "5a1f63d5f36a25c94632766a7f41d48c8d13847a425fa9e48b87fc8319b0f011"`
[INFO] [stdout] 5a1f63d5f36a25c94632766a7f41d48c8d13847a425fa9e48b87fc8319b0f011