[INFO] crate slog-json 2.3.0 is already in cache
[INFO] testing slog-json-2.3.0 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate slog-json 2.3.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate slog-json 2.3.0 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slog-json 2.3.0
[INFO] finished tweaking crates.io crate slog-json 2.3.0
[INFO] tweaked toml for crates.io crate slog-json 2.3.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e299672efd68f4c41e3335c3c29616f3fa3af8251d70c21c1618c1be738cd12d
[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" "e299672efd68f4c41e3335c3c29616f3fa3af8251d70c21c1618c1be738cd12d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e299672efd68f4c41e3335c3c29616f3fa3af8251d70c21c1618c1be738cd12d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e299672efd68f4c41e3335c3c29616f3fa3af8251d70c21c1618c1be738cd12d", kill_on_drop: false }`
[INFO] [stdout] e299672efd68f4c41e3335c3c29616f3fa3af8251d70c21c1618c1be738cd12d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "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] 49a323b46bf6c5dae5cdfbbac7cc7e9d2093faa36b4612c9247ba373883db7d5
[INFO] running `Command { std: "docker" "start" "-a" "49a323b46bf6c5dae5cdfbbac7cc7e9d2093faa36b4612c9247ba373883db7d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling slog-json v2.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:58:23
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let ser_map = try!(ser.serialize_map(len)
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |         impl_m!(self, key, &val)
[INFO] [stdout]    |         ------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         impl_m!(self, key, &())
[INFO] [stdout]    |         ----------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 |         impl_m!(self, key, &val)
[INFO] [stdout]    |         ------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |         impl_m!(self, key, &val)
[INFO] [stdout]    |         ------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 110 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 122 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 128 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 131 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 137 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |                 || impl_m!(self, key, &*buf)
[INFO] [stdout]     |                    ------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:201:13
[INFO] [stdout]     |
[INFO] [stdout] 201 |             try!(SerdeSerializer::start(&mut *serializer, None));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             try!(kv.serialize(rinfo, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:207:9
[INFO] [stdout]     |
[INFO] [stdout] 207 |         try!(logger_values.serialize(rinfo, &mut serializer));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |         try!(rinfo.kv().serialize(rinfo, &mut serializer));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:213:9
[INFO] [stdout]     |
[INFO] [stdout] 213 |         try!(res.map_err(|e| io::Error::new(io::ErrorKind::Other, e)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:232:13
[INFO] [stdout]     |
[INFO] [stdout] 232 |             try!(self.log_impl(&mut serializer, &rinfo, &logger_values));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:236:13
[INFO] [stdout]     |
[INFO] [stdout] 236 |             try!(self.log_impl(&mut serializer, &rinfo, &logger_values));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:240:13
[INFO] [stdout]     |
[INFO] [stdout] 240 |             try!(io.write_all("\n".as_bytes()));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.01s
[INFO] running `Command { std: "docker" "inspect" "49a323b46bf6c5dae5cdfbbac7cc7e9d2093faa36b4612c9247ba373883db7d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49a323b46bf6c5dae5cdfbbac7cc7e9d2093faa36b4612c9247ba373883db7d5", kill_on_drop: false }`
[INFO] [stdout] 49a323b46bf6c5dae5cdfbbac7cc7e9d2093faa36b4612c9247ba373883db7d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df34d8c6fe2a63f5e1d11b7a53963f35c4c52560548d6cffb0cd4a2dd3474792
[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" "df34d8c6fe2a63f5e1d11b7a53963f35c4c52560548d6cffb0cd4a2dd3474792", kill_on_drop: false }`
[INFO] [stderr]    Compiling slog-json v2.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:58:23
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let ser_map = try!(ser.serialize_map(len)
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |         impl_m!(self, key, &val)
[INFO] [stdout]    |         ------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         impl_m!(self, key, &())
[INFO] [stdout]    |         ----------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 |         impl_m!(self, key, &val)
[INFO] [stdout]    |         ------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |         impl_m!(self, key, &val)
[INFO] [stdout]    |         ------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 110 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 122 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 128 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 131 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 137 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |                 || impl_m!(self, key, &*buf)
[INFO] [stdout]     |                    ------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:201:13
[INFO] [stdout]     |
[INFO] [stdout] 201 |             try!(SerdeSerializer::start(&mut *serializer, None));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             try!(kv.serialize(rinfo, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:207:9
[INFO] [stdout]     |
[INFO] [stdout] 207 |         try!(logger_values.serialize(rinfo, &mut serializer));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |         try!(rinfo.kv().serialize(rinfo, &mut serializer));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:213:9
[INFO] [stdout]     |
[INFO] [stdout] 213 |         try!(res.map_err(|e| io::Error::new(io::ErrorKind::Other, e)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:232:13
[INFO] [stdout]     |
[INFO] [stdout] 232 |             try!(self.log_impl(&mut serializer, &rinfo, &logger_values));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:236:13
[INFO] [stdout]     |
[INFO] [stdout] 236 |             try!(self.log_impl(&mut serializer, &rinfo, &logger_values));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:240:13
[INFO] [stdout]     |
[INFO] [stdout] 240 |             try!(io.write_all("\n".as_bytes()));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:58:23
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let ser_map = try!(ser.serialize_map(len)
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |         impl_m!(self, key, &val)
[INFO] [stdout]    |         ------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         impl_m!(self, key, &())
[INFO] [stdout]    |         ----------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 |         impl_m!(self, key, &val)
[INFO] [stdout]    |         ------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |         impl_m!(self, key, &val)
[INFO] [stdout]    |         ------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 110 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 122 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 128 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 131 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 137 |         impl_m!(self, key, &val)
[INFO] [stdout]     |         ------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:75:9
[INFO] [stdout]     |
[INFO] [stdout] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |                 || impl_m!(self, key, &*buf)
[INFO] [stdout]     |                    ------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:201:13
[INFO] [stdout]     |
[INFO] [stdout] 201 |             try!(SerdeSerializer::start(&mut *serializer, None));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             try!(kv.serialize(rinfo, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:207:9
[INFO] [stdout]     |
[INFO] [stdout] 207 |         try!(logger_values.serialize(rinfo, &mut serializer));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |         try!(rinfo.kv().serialize(rinfo, &mut serializer));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:213:9
[INFO] [stdout]     |
[INFO] [stdout] 213 |         try!(res.map_err(|e| io::Error::new(io::ErrorKind::Other, e)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:232:13
[INFO] [stdout]     |
[INFO] [stdout] 232 |             try!(self.log_impl(&mut serializer, &rinfo, &logger_values));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:236:13
[INFO] [stdout]     |
[INFO] [stdout] 236 |             try!(self.log_impl(&mut serializer, &rinfo, &logger_values));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> lib.rs:240:13
[INFO] [stdout]     |
[INFO] [stdout] 240 |             try!(io.write_all("\n".as_bytes()));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "df34d8c6fe2a63f5e1d11b7a53963f35c4c52560548d6cffb0cd4a2dd3474792", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df34d8c6fe2a63f5e1d11b7a53963f35c4c52560548d6cffb0cd4a2dd3474792", kill_on_drop: false }`
[INFO] [stdout] df34d8c6fe2a63f5e1d11b7a53963f35c4c52560548d6cffb0cd4a2dd3474792
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7b20289a40920de53974a641721fc44c7eddb5028a209c03704bd7dfe6c065ff
[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" "7b20289a40920de53974a641721fc44c7eddb5028a209c03704bd7dfe6c065ff", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> lib.rs:58:23
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let ser_map = try!(ser.serialize_map(len)
[INFO] [stderr]    |                       ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> lib.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 85 |         impl_m!(self, key, &val)
[INFO] [stderr]    |         ------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> lib.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 89 |         impl_m!(self, key, &())
[INFO] [stderr]    |         ----------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> lib.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 93 |         impl_m!(self, key, &val)
[INFO] [stderr]    |         ------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> lib.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 98 |         impl_m!(self, key, &val)
[INFO] [stderr]    |         ------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 101 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 104 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 107 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 110 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 113 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 116 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 119 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 122 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 125 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 128 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 131 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 134 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 137 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 150 |                 || impl_m!(self, key, &*buf)
[INFO] [stderr]     |                    ------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:201:13
[INFO] [stderr]     |
[INFO] [stderr] 201 |             try!(SerdeSerializer::start(&mut *serializer, None));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:204:13
[INFO] [stderr]     |
[INFO] [stderr] 204 |             try!(kv.serialize(rinfo, &mut serializer));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:207:9
[INFO] [stderr]     |
[INFO] [stderr] 207 |         try!(logger_values.serialize(rinfo, &mut serializer));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:209:9
[INFO] [stderr]     |
[INFO] [stderr] 209 |         try!(rinfo.kv().serialize(rinfo, &mut serializer));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:213:9
[INFO] [stderr]     |
[INFO] [stderr] 213 |         try!(res.map_err(|e| io::Error::new(io::ErrorKind::Other, e)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:232:13
[INFO] [stderr]     |
[INFO] [stderr] 232 |             try!(self.log_impl(&mut serializer, &rinfo, &logger_values));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:236:13
[INFO] [stderr]     |
[INFO] [stderr] 236 |             try!(self.log_impl(&mut serializer, &rinfo, &logger_values));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:240:13
[INFO] [stderr]     |
[INFO] [stderr] 240 |             try!(io.write_all("\n".as_bytes()));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 27 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> lib.rs:58:23
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let ser_map = try!(ser.serialize_map(len)
[INFO] [stderr]    |                       ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> lib.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 85 |         impl_m!(self, key, &val)
[INFO] [stderr]    |         ------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> lib.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 89 |         impl_m!(self, key, &())
[INFO] [stderr]    |         ----------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> lib.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 93 |         impl_m!(self, key, &val)
[INFO] [stderr]    |         ------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> lib.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 98 |         impl_m!(self, key, &val)
[INFO] [stderr]    |         ------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 101 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 104 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 107 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 110 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 113 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 116 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 119 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 122 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 125 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 128 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 131 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 134 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 137 |         impl_m!(self, key, &val)
[INFO] [stderr]     |         ------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:75:9
[INFO] [stderr]     |
[INFO] [stderr] 75  |         try!($s.ser_map.serialize_entry(k_s, $val)
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 150 |                 || impl_m!(self, key, &*buf)
[INFO] [stderr]     |                    ------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:201:13
[INFO] [stderr]     |
[INFO] [stderr] 201 |             try!(SerdeSerializer::start(&mut *serializer, None));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:204:13
[INFO] [stderr]     |
[INFO] [stderr] 204 |             try!(kv.serialize(rinfo, &mut serializer));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:207:9
[INFO] [stderr]     |
[INFO] [stderr] 207 |         try!(logger_values.serialize(rinfo, &mut serializer));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:209:9
[INFO] [stderr]     |
[INFO] [stderr] 209 |         try!(rinfo.kv().serialize(rinfo, &mut serializer));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:213:9
[INFO] [stderr]     |
[INFO] [stderr] 213 |         try!(res.map_err(|e| io::Error::new(io::ErrorKind::Other, e)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:232:13
[INFO] [stderr]     |
[INFO] [stderr] 232 |             try!(self.log_impl(&mut serializer, &rinfo, &logger_values));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:236:13
[INFO] [stderr]     |
[INFO] [stderr] 236 |             try!(self.log_impl(&mut serializer, &rinfo, &logger_values));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> lib.rs:240:13
[INFO] [stderr]     |
[INFO] [stderr] 240 |             try!(io.write_all("\n".as_bytes()));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 27 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/slog_json-654a7558cbb410f2
[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
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests slog-json
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test lib.rs - (line 4) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7b20289a40920de53974a641721fc44c7eddb5028a209c03704bd7dfe6c065ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b20289a40920de53974a641721fc44c7eddb5028a209c03704bd7dfe6c065ff", kill_on_drop: false }`
[INFO] [stdout] 7b20289a40920de53974a641721fc44c7eddb5028a209c03704bd7dfe6c065ff