[INFO] fetching crate buffoon 0.5.0...
[INFO] building buffoon-0.5.0 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate buffoon 0.5.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate buffoon 0.5.0 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate buffoon 0.5.0
[INFO] finished tweaking crates.io crate buffoon 0.5.0
[INFO] tweaked toml for crates.io crate buffoon 0.5.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr] warning: `[project]` is deprecated in favor of `[package]`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e7f13daab0434adc1cf6f56eabaac887c80ec97cef09452d45934dfd95ef914
[INFO] running `Command { std: "docker" "start" "-a" "7e7f13daab0434adc1cf6f56eabaac887c80ec97cef09452d45934dfd95ef914", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e7f13daab0434adc1cf6f56eabaac887c80ec97cef09452d45934dfd95ef914", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e7f13daab0434adc1cf6f56eabaac887c80ec97cef09452d45934dfd95ef914", kill_on_drop: false }`
[INFO] [stdout] 7e7f13daab0434adc1cf6f56eabaac887c80ec97cef09452d45934dfd95ef914
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d57e26c880f3cbf7c95cd66fb60d6332081fe2349ab863e1308c596a53ec0192
[INFO] running `Command { std: "docker" "start" "-a" "d57e26c880f3cbf7c95cd66fb60d6332081fe2349ab863e1308c596a53ec0192", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr] warning: `[project]` is deprecated in favor of `[package]`
[INFO] [stderr]    Compiling buffoon v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:38:28
[INFO] [stdout]    |
[INFO] [stdout] 38 |         if let Some(num) = try!(self.read_unsigned_varint()) {
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:58:32
[INFO] [stdout]    |
[INFO] [stdout] 58 |         while let Some(byte) = try!(self.read_byte()) {
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:76:28
[INFO] [stdout]    |
[INFO] [stdout] 76 |         if let Some(len) = try!(self.read_usize()) {
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:88:27
[INFO] [stdout]    |
[INFO] [stdout] 88 |             if let None = try!(self.read_byte()) {
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:108:27
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 let cnt = try!(self.reader.read(&mut buf[off..]));
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:127:17
[INFO] [stdout]     |
[INFO] [stdout] 127 |         if 1 == try!(self.reader.read(&mut buf)) {
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:149:34
[INFO] [stdout]     |
[INFO] [stdout] 149 |                 if let Some(_) = try!(self.input.read_unsigned_varint()) {
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:157:36
[INFO] [stdout]     |
[INFO] [stdout] 157 |                 if let Some(len) = try!(self.input.read_usize()) {
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:158:31
[INFO] [stdout]     |
[INFO] [stdout] 158 |                     if len == try!(self.input.skip(len)) {
[INFO] [stdout]     |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:174:36
[INFO] [stdout]     |
[INFO] [stdout] 174 |                 if let Some(val) = try!(self.input.read_u64()) {
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:185:33
[INFO] [stdout]     |
[INFO] [stdout] 185 |         match String::from_utf8(try!(self.read_bytes())) {
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:194:36
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 if let Some(val) = try!(self.input.read_length_delimited()) {
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |             try!(self.write_message_field(field, msg));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         try!(self.write_head(field, LengthDelimited));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         try!(self.write_usize(val.len()));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         try!(self.write_bytes(val));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |             try!(self.write_byte_field(field, val));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:44:24
[INFO] [stdout]    |
[INFO] [stdout] 44 |             Some(s) => try!(self.write_str_field(field, s.borrow())),
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             try!(self.write_byte(bits | 0x80));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:78:17
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 try!(self.write_byte(bits));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         try!(self.write_usize(bits));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         try!(out.write_head(field, Varint));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |         try!(out.write_usize(self));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:108:9
[INFO] [stdout]     |
[INFO] [stdout] 108 |         try!(out.write_head(field, Varint));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         try!(out.write_unsigned_varint(self));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         try!(self.writer.write(bytes));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |             try!(self.write_head(field, LengthDelimited));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             try!(self.write_usize(size));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             try!(msg.serialize(self));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         try!(msg.serialize(&mut out));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         try!(msg.serialize(self));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |             try!(self.write_head(field, LengthDelimited));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |             try!(self.write_usize(nested_size));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     try!(msg.serialize(&mut serializer));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     try!(serializer.serialize_into(msg, &mut bytes));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:31:22
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let serializer = try!(serializer_for(msg));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/input_stream.rs:104:17
[INFO] [stdout]     |
[INFO] [stdout] 104 |             let mut buf = slice::from_raw_parts_mut(ret.as_mut_ptr(), len);
[INFO] [stdout]     |                 ----^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "d57e26c880f3cbf7c95cd66fb60d6332081fe2349ab863e1308c596a53ec0192", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d57e26c880f3cbf7c95cd66fb60d6332081fe2349ab863e1308c596a53ec0192", kill_on_drop: false }`
[INFO] [stdout] d57e26c880f3cbf7c95cd66fb60d6332081fe2349ab863e1308c596a53ec0192
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68858906f224c6608faf6f5e2058211b82286af8cf79f8aae2d88cbd3bf9f3ad
[INFO] running `Command { std: "docker" "start" "-a" "68858906f224c6608faf6f5e2058211b82286af8cf79f8aae2d88cbd3bf9f3ad", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr] warning: `[project]` is deprecated in favor of `[package]`
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:38:28
[INFO] [stdout]    |
[INFO] [stdout] 38 |         if let Some(num) = try!(self.read_unsigned_varint()) {
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:58:32
[INFO] [stdout]    |
[INFO] [stdout] 58 |         while let Some(byte) = try!(self.read_byte()) {
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:76:28
[INFO] [stdout]    |
[INFO] [stdout] 76 |         if let Some(len) = try!(self.read_usize()) {
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:88:27
[INFO] [stdout]    |
[INFO] [stdout] 88 |             if let None = try!(self.read_byte()) {
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:108:27
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 let cnt = try!(self.reader.read(&mut buf[off..]));
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:127:17
[INFO] [stdout]     |
[INFO] [stdout] 127 |         if 1 == try!(self.reader.read(&mut buf)) {
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:149:34
[INFO] [stdout]     |
[INFO] [stdout] 149 |                 if let Some(_) = try!(self.input.read_unsigned_varint()) {
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:157:36
[INFO] [stdout]     |
[INFO] [stdout] 157 |                 if let Some(len) = try!(self.input.read_usize()) {
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:158:31
[INFO] [stdout]     |
[INFO] [stdout] 158 |                     if len == try!(self.input.skip(len)) {
[INFO] [stdout]     |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:174:36
[INFO] [stdout]     |
[INFO] [stdout] 174 |                 if let Some(val) = try!(self.input.read_u64()) {
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:185:33
[INFO] [stdout]     |
[INFO] [stdout] 185 |         match String::from_utf8(try!(self.read_bytes())) {
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:194:36
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 if let Some(val) = try!(self.input.read_length_delimited()) {
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |             try!(self.write_message_field(field, msg));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         try!(self.write_head(field, LengthDelimited));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         try!(self.write_usize(val.len()));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         try!(self.write_bytes(val));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |             try!(self.write_byte_field(field, val));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:44:24
[INFO] [stdout]    |
[INFO] [stdout] 44 |             Some(s) => try!(self.write_str_field(field, s.borrow())),
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             try!(self.write_byte(bits | 0x80));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:78:17
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 try!(self.write_byte(bits));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         try!(self.write_usize(bits));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         try!(out.write_head(field, Varint));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |         try!(out.write_usize(self));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:108:9
[INFO] [stdout]     |
[INFO] [stdout] 108 |         try!(out.write_head(field, Varint));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         try!(out.write_unsigned_varint(self));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         try!(self.writer.write(bytes));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |             try!(self.write_head(field, LengthDelimited));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             try!(self.write_usize(size));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             try!(msg.serialize(self));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         try!(msg.serialize(&mut out));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         try!(msg.serialize(self));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |             try!(self.write_head(field, LengthDelimited));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |             try!(self.write_usize(nested_size));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     try!(msg.serialize(&mut serializer));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     try!(serializer.serialize_into(msg, &mut bytes));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:31:22
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let serializer = try!(serializer_for(msg));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/input_stream.rs:104:17
[INFO] [stdout]     |
[INFO] [stdout] 104 |             let mut buf = slice::from_raw_parts_mut(ret.as_mut_ptr(), len);
[INFO] [stdout]     |                 ----^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling buffoon v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:38:28
[INFO] [stdout]    |
[INFO] [stdout] 38 |         if let Some(num) = try!(self.read_unsigned_varint()) {
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:58:32
[INFO] [stdout]    |
[INFO] [stdout] 58 |         while let Some(byte) = try!(self.read_byte()) {
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:76:28
[INFO] [stdout]    |
[INFO] [stdout] 76 |         if let Some(len) = try!(self.read_usize()) {
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/input_stream.rs:88:27
[INFO] [stdout]    |
[INFO] [stdout] 88 |             if let None = try!(self.read_byte()) {
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:108:27
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 let cnt = try!(self.reader.read(&mut buf[off..]));
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:127:17
[INFO] [stdout]     |
[INFO] [stdout] 127 |         if 1 == try!(self.reader.read(&mut buf)) {
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:149:34
[INFO] [stdout]     |
[INFO] [stdout] 149 |                 if let Some(_) = try!(self.input.read_unsigned_varint()) {
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:157:36
[INFO] [stdout]     |
[INFO] [stdout] 157 |                 if let Some(len) = try!(self.input.read_usize()) {
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:158:31
[INFO] [stdout]     |
[INFO] [stdout] 158 |                     if len == try!(self.input.skip(len)) {
[INFO] [stdout]     |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:174:36
[INFO] [stdout]     |
[INFO] [stdout] 174 |                 if let Some(val) = try!(self.input.read_u64()) {
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:185:33
[INFO] [stdout]     |
[INFO] [stdout] 185 |         match String::from_utf8(try!(self.read_bytes())) {
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/input_stream.rs:194:36
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 if let Some(val) = try!(self.input.read_length_delimited()) {
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |             try!(self.write_message_field(field, msg));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         try!(self.write_head(field, LengthDelimited));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         try!(self.write_usize(val.len()));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         try!(self.write_bytes(val));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |             try!(self.write_byte_field(field, val));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:44:24
[INFO] [stdout]    |
[INFO] [stdout] 44 |             Some(s) => try!(self.write_str_field(field, s.borrow())),
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             try!(self.write_byte(bits | 0x80));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:78:17
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 try!(self.write_byte(bits));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_stream.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         try!(self.write_usize(bits));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         try!(out.write_head(field, Varint));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |         try!(out.write_usize(self));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:108:9
[INFO] [stdout]     |
[INFO] [stdout] 108 |         try!(out.write_head(field, Varint));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/output_stream.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         try!(out.write_unsigned_varint(self));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         try!(self.writer.write(bytes));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |             try!(self.write_head(field, LengthDelimited));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             try!(self.write_usize(size));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/output_writer.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             try!(msg.serialize(self));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         try!(msg.serialize(&mut out));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         try!(msg.serialize(self));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |             try!(self.write_head(field, LengthDelimited));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |             try!(self.write_usize(nested_size));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     try!(msg.serialize(&mut serializer));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     try!(serializer.serialize_into(msg, &mut bytes));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:31:22
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let serializer = try!(serializer_for(msg));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |             try!(out.write_str_field(1, "hello"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/input_stream.rs:104:17
[INFO] [stdout]     |
[INFO] [stdout] 104 |             let mut buf = slice::from_raw_parts_mut(ret.as_mut_ptr(), len);
[INFO] [stdout]     |                 ----^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "68858906f224c6608faf6f5e2058211b82286af8cf79f8aae2d88cbd3bf9f3ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68858906f224c6608faf6f5e2058211b82286af8cf79f8aae2d88cbd3bf9f3ad", kill_on_drop: false }`
[INFO] [stdout] 68858906f224c6608faf6f5e2058211b82286af8cf79f8aae2d88cbd3bf9f3ad