[INFO] fetching crate buffoon 0.5.0...
[INFO] checking buffoon-0.5.0 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604
[INFO] extracting crate buffoon 0.5.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate buffoon 0.5.0 on toolchain 4d98531622e1718ae0bc3c7a1ab9cd8938428452
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "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-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr] warning: `[project]` is deprecated in favor of `[package]`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b3a4f509d3be4b34d86d295e6d2acc24eb1aab359cace876b638b63ce7059a49
[INFO] running `Command { std: "docker" "start" "-a" "b3a4f509d3be4b34d86d295e6d2acc24eb1aab359cace876b638b63ce7059a49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3a4f509d3be4b34d86d295e6d2acc24eb1aab359cace876b638b63ce7059a49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3a4f509d3be4b34d86d295e6d2acc24eb1aab359cace876b638b63ce7059a49", kill_on_drop: false }`
[INFO] [stdout] b3a4f509d3be4b34d86d295e6d2acc24eb1aab359cace876b638b63ce7059a49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a13a38033879fd6a3cf18478f84703d611667c71663706e03f5053bbba626530
[INFO] running `Command { std: "docker" "start" "-a" "a13a38033879fd6a3cf18478f84703d611667c71663706e03f5053bbba626530", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr] warning: `[project]` is deprecated in favor of `[package]`
[INFO] [stderr]     Checking 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/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] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/output_stream.rs:52:47
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn write_repeated_str_field<'a, I: Iterator<Item=&'a str>>(&mut self, field: usize, vals: I) -> io::Result<()> {
[INFO] [stdout]    |                                                                                         ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 52 |         self.write_repeated_byte_field(field, vals.map(|s| s.as_bytes()))
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 37 warnings emitted
[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] error: could not compile `buffoon` (lib) due to 2 previous errors; 37 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/output_stream.rs:52:47
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn write_repeated_str_field<'a, I: Iterator<Item=&'a str>>(&mut self, field: usize, vals: I) -> io::Result<()> {
[INFO] [stdout]    |                                                                                         ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 52 |         self.write_repeated_byte_field(field, vals.map(|s| s.as_bytes()))
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 38 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `buffoon` (lib test) due to 2 previous errors; 38 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "a13a38033879fd6a3cf18478f84703d611667c71663706e03f5053bbba626530", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a13a38033879fd6a3cf18478f84703d611667c71663706e03f5053bbba626530", kill_on_drop: false }`
[INFO] [stdout] a13a38033879fd6a3cf18478f84703d611667c71663706e03f5053bbba626530