[INFO] fetching crate buffoon 0.5.0...
[INFO] testing buffoon-0.5.0 against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] extracting crate buffoon 0.5.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate buffoon 0.5.0 on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "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-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ddc554af83dcbf4323c7174d9bfbaacb6b43ad0e82efaf1fd094a305d2c5c520
[INFO] running `Command { std: "docker" "start" "-a" "ddc554af83dcbf4323c7174d9bfbaacb6b43ad0e82efaf1fd094a305d2c5c520", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddc554af83dcbf4323c7174d9bfbaacb6b43ad0e82efaf1fd094a305d2c5c520", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddc554af83dcbf4323c7174d9bfbaacb6b43ad0e82efaf1fd094a305d2c5c520", kill_on_drop: false }`
[INFO] [stdout] ddc554af83dcbf4323c7174d9bfbaacb6b43ad0e82efaf1fd094a305d2c5c520
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a64ab21773844a5e5783954c29c252689260b8a62b0d6a0fa4939a29ef6b6d89
[INFO] running `Command { std: "docker" "start" "-a" "a64ab21773844a5e5783954c29c252689260b8a62b0d6a0fa4939a29ef6b6d89", kill_on_drop: false }`
[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: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: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: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: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:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     try!(serializer.serialize_into(msg, &mut bytes));
[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] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "a64ab21773844a5e5783954c29c252689260b8a62b0d6a0fa4939a29ef6b6d89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a64ab21773844a5e5783954c29c252689260b8a62b0d6a0fa4939a29ef6b6d89", kill_on_drop: false }`
[INFO] [stdout] a64ab21773844a5e5783954c29c252689260b8a62b0d6a0fa4939a29ef6b6d89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4130b992c6e4ddb7b2f2fa7a891a18d24bb07e2c73c7e23e4796555a4d9234f4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4130b992c6e4ddb7b2f2fa7a891a18d24bb07e2c73c7e23e4796555a4d9234f4", kill_on_drop: false }`
[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: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: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: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] [stderr]    Compiling buffoon v0.5.0 (/opt/rustwide/workdir)
[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: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:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     try!(serializer.serialize_into(msg, &mut bytes));
[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] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[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: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: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: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: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: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: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] [stdout] warning: 38 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "4130b992c6e4ddb7b2f2fa7a891a18d24bb07e2c73c7e23e4796555a4d9234f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4130b992c6e4ddb7b2f2fa7a891a18d24bb07e2c73c7e23e4796555a4d9234f4", kill_on_drop: false }`
[INFO] [stdout] 4130b992c6e4ddb7b2f2fa7a891a18d24bb07e2c73c7e23e4796555a4d9234f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f8d76d2ab6bb0f31be0eb458b25bdc8f979fca2e96c6200d98451497ba33f774
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f8d76d2ab6bb0f31be0eb458b25bdc8f979fca2e96c6200d98451497ba33f774", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/input_stream.rs:38:28
[INFO] [stderr]    |
[INFO] [stderr] 38 |         if let Some(num) = try!(self.read_unsigned_varint()) {
[INFO] [stderr]    |                            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/input_stream.rs:58:32
[INFO] [stderr]    |
[INFO] [stderr] 58 |         while let Some(byte) = try!(self.read_byte()) {
[INFO] [stderr]    |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/input_stream.rs:76:28
[INFO] [stderr]    |
[INFO] [stderr] 76 |         if let Some(len) = try!(self.read_usize()) {
[INFO] [stderr]    |                            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/input_stream.rs:88:27
[INFO] [stderr]    |
[INFO] [stderr] 88 |             if let None = try!(self.read_byte()) {
[INFO] [stderr]    |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:108:27
[INFO] [stderr]     |
[INFO] [stderr] 108 |                 let cnt = try!(self.reader.read(&mut buf[off..]));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:127:17
[INFO] [stderr]     |
[INFO] [stderr] 127 |         if 1 == try!(self.reader.read(&mut buf)) {
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:149:34
[INFO] [stderr]     |
[INFO] [stderr] 149 |                 if let Some(_) = try!(self.input.read_unsigned_varint()) {
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:157:36
[INFO] [stderr]     |
[INFO] [stderr] 157 |                 if let Some(len) = try!(self.input.read_usize()) {
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:158:31
[INFO] [stderr]     |
[INFO] [stderr] 158 |                     if len == try!(self.input.skip(len)) {
[INFO] [stderr]     |                               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:174:36
[INFO] [stderr]     |
[INFO] [stderr] 174 |                 if let Some(val) = try!(self.input.read_u64()) {
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:185:33
[INFO] [stderr]     |
[INFO] [stderr] 185 |         match String::from_utf8(try!(self.read_bytes())) {
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:194:36
[INFO] [stderr]     |
[INFO] [stderr] 194 |                 if let Some(val) = try!(self.input.read_length_delimited()) {
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |             try!(self.write_message_field(field, msg));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         try!(self.write_head(field, LengthDelimited));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |         try!(self.write_usize(val.len()));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |         try!(self.write_bytes(val));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |             try!(self.write_byte_field(field, val));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:44:24
[INFO] [stderr]    |
[INFO] [stderr] 44 |             Some(s) => try!(self.write_str_field(field, s.borrow())),
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:78:17
[INFO] [stderr]    |
[INFO] [stderr] 78 |                 try!(self.write_byte(bits));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |             try!(self.write_byte(bits | 0x80));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |         try!(self.write_usize(bits));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/output_stream.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |         try!(out.write_head(field, Varint));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/output_stream.rs:101:9
[INFO] [stderr]     |
[INFO] [stderr] 101 |         try!(out.write_usize(self));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/output_stream.rs:108:9
[INFO] [stderr]     |
[INFO] [stderr] 108 |         try!(out.write_head(field, Varint));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/output_stream.rs:109:9
[INFO] [stderr]     |
[INFO] [stderr] 109 |         try!(out.write_unsigned_varint(self));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_writer.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         try!(self.writer.write(bytes));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_writer.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |             try!(self.write_head(field, LengthDelimited));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_writer.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 40 |             try!(self.write_usize(size));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_writer.rs:42:13
[INFO] [stderr]    |
[INFO] [stderr] 42 |             try!(msg.serialize(self));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         try!(msg.serialize(&mut out));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |         try!(msg.serialize(self));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |             try!(self.write_head(field, LengthDelimited));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |             try!(self.write_usize(nested_size));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     try!(msg.serialize(&mut serializer));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:31:22
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let serializer = try!(serializer_for(msg));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     try!(serializer.serialize_into(msg, &mut bytes));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/input_stream.rs:104:17
[INFO] [stderr]     |
[INFO] [stderr] 104 |             let mut buf = slice::from_raw_parts_mut(ret.as_mut_ptr(), len);
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 37 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/input_stream.rs:38:28
[INFO] [stderr]    |
[INFO] [stderr] 38 |         if let Some(num) = try!(self.read_unsigned_varint()) {
[INFO] [stderr]    |                            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/input_stream.rs:58:32
[INFO] [stderr]    |
[INFO] [stderr] 58 |         while let Some(byte) = try!(self.read_byte()) {
[INFO] [stderr]    |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/input_stream.rs:76:28
[INFO] [stderr]    |
[INFO] [stderr] 76 |         if let Some(len) = try!(self.read_usize()) {
[INFO] [stderr]    |                            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/input_stream.rs:88:27
[INFO] [stderr]    |
[INFO] [stderr] 88 |             if let None = try!(self.read_byte()) {
[INFO] [stderr]    |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:108:27
[INFO] [stderr]     |
[INFO] [stderr] 108 |                 let cnt = try!(self.reader.read(&mut buf[off..]));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:127:17
[INFO] [stderr]     |
[INFO] [stderr] 127 |         if 1 == try!(self.reader.read(&mut buf)) {
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:149:34
[INFO] [stderr]     |
[INFO] [stderr] 149 |                 if let Some(_) = try!(self.input.read_unsigned_varint()) {
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:157:36
[INFO] [stderr]     |
[INFO] [stderr] 157 |                 if let Some(len) = try!(self.input.read_usize()) {
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:158:31
[INFO] [stderr]     |
[INFO] [stderr] 158 |                     if len == try!(self.input.skip(len)) {
[INFO] [stderr]     |                               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:174:36
[INFO] [stderr]     |
[INFO] [stderr] 174 |                 if let Some(val) = try!(self.input.read_u64()) {
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:185:33
[INFO] [stderr]     |
[INFO] [stderr] 185 |         match String::from_utf8(try!(self.read_bytes())) {
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/input_stream.rs:194:36
[INFO] [stderr]     |
[INFO] [stderr] 194 |                 if let Some(val) = try!(self.input.read_length_delimited()) {
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |             try!(self.write_message_field(field, msg));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         try!(self.write_head(field, LengthDelimited));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |         try!(self.write_usize(val.len()));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |         try!(self.write_bytes(val));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |             try!(self.write_byte_field(field, val));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:44:24
[INFO] [stderr]    |
[INFO] [stderr] 44 |             Some(s) => try!(self.write_str_field(field, s.borrow())),
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:78:17
[INFO] [stderr]    |
[INFO] [stderr] 78 |                 try!(self.write_byte(bits));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |             try!(self.write_byte(bits | 0x80));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_stream.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |         try!(self.write_usize(bits));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/output_stream.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |         try!(out.write_head(field, Varint));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/output_stream.rs:101:9
[INFO] [stderr]     |
[INFO] [stderr] 101 |         try!(out.write_usize(self));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/output_stream.rs:108:9
[INFO] [stderr]     |
[INFO] [stderr] 108 |         try!(out.write_head(field, Varint));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/output_stream.rs:109:9
[INFO] [stderr]     |
[INFO] [stderr] 109 |         try!(out.write_unsigned_varint(self));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_writer.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         try!(self.writer.write(bytes));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_writer.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |             try!(self.write_head(field, LengthDelimited));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_writer.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 40 |             try!(self.write_usize(size));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/output_writer.rs:42:13
[INFO] [stderr]    |
[INFO] [stderr] 42 |             try!(msg.serialize(self));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         try!(msg.serialize(&mut out));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |         try!(msg.serialize(self));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |             try!(self.write_head(field, LengthDelimited));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |             try!(self.write_usize(nested_size));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     try!(msg.serialize(&mut serializer));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:31:22
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let serializer = try!(serializer_for(msg));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     try!(serializer.serialize_into(msg, &mut bytes));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:61:13
[INFO] [stderr]    |
[INFO] [stderr] 61 |             try!(out.write_str_field(1, "hello"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/input_stream.rs:104:17
[INFO] [stderr]     |
[INFO] [stderr] 104 |             let mut buf = slice::from_raw_parts_mut(ret.as_mut_ptr(), len);
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 38 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/buffoon-80c3a9d576da0e57)
[INFO] [stdout] running 11 tests
[INFO] [stdout] test input_stream::test::test_reading_multi_byte_tag_field ... ok
[INFO] [stdout] test input_stream::test::test_reading_single_byte_usize ... ok
[INFO] [stdout] test input_stream::test::test_reading_incorrect_type_from_field ... ok
[INFO] [stdout] test input_stream::test::test_reading_twice_from_field ... ok
[INFO] [stdout] test test::test_writing_unit_struct ... ok
[INFO] [stdout] test test::test_writing_simple_message ... ok
[INFO] [stdout] test input_stream::test::test_reading_string ... ok
[INFO] [stdout] test input_stream::test::test_reading_sequential_fields ... ok
[INFO] [stdout] test input_stream::test::test_skipping_string_field ... ok
[INFO] [stdout] test input_stream::test::test_reading_multi_byte_usize ... ok
[INFO] [stdout] test input_stream::test::test_reading_empty_stream ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests buffoon
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f8d76d2ab6bb0f31be0eb458b25bdc8f979fca2e96c6200d98451497ba33f774", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8d76d2ab6bb0f31be0eb458b25bdc8f979fca2e96c6200d98451497ba33f774", kill_on_drop: false }`
[INFO] [stdout] f8d76d2ab6bb0f31be0eb458b25bdc8f979fca2e96c6200d98451497ba33f774