[INFO] crate serde_state 0.4.7 is already in cache
[INFO] checking serde_state-0.4.7 against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] extracting crate serde_state 0.4.7 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate serde_state 0.4.7 on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate serde_state 0.4.7
[INFO] finished tweaking crates.io crate serde_state 0.4.7
[INFO] tweaked toml for crates.io crate serde_state 0.4.7 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 05651919eb33db1b6f387ec6e4a09e6d8a6f2365e01c2e4d36c867031fbaa473
[INFO] running `"docker" "start" "-a" "05651919eb33db1b6f387ec6e4a09e6d8a6f2365e01c2e4d36c867031fbaa473"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]     Checking serde_state v0.4.7 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:176:41
[INFO] [stderr]     |
[INFO] [stderr] 176 |                 while let Some(value) = try!(access.next_element_seed(self.seed.clone())) {
[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]    --> src/de/seed_impls.rs:231:33
[INFO] [stderr]     |
[INFO] [stderr] 231 |         while let Some(value) = try!(access.next_element_seed(Seed::new(&mut *&mut *self.seed))) {
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:439:43
[INFO] [stderr]     |
[INFO] [stderr] 439 |                           let $name = match try!(seq.next_element_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                             ^^^
[INFO] [stderr] ...
[INFO] [stderr] 464 | / array_impls! {
[INFO] [stderr] 465 | |     1 => (0 a)
[INFO] [stderr] 466 | |     2 => (0 a 1 b)
[INFO] [stderr] 467 | |     3 => (0 a 1 b 2 c)
[INFO] [stderr] ...   |
[INFO] [stderr] 496 | |     32 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26 aa 27 ab 28 ac 29 ad 30 ae 31 af)
[INFO] [stderr] 497 | | }
[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]    --> src/de/seed_impls.rs:529:43
[INFO] [stderr]     |
[INFO] [stderr] 529 |                           let $name = match try!(seq.next_element_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                             ^^^
[INFO] [stderr] ...
[INFO] [stderr] 552 | / tuple_impls! {
[INFO] [stderr] 553 | |     1 TupleVisitor1 => (0 T0)
[INFO] [stderr] 554 | |     2 TupleVisitor2 => (0 T0 1 T1)
[INFO] [stderr] 555 | |     3 TupleVisitor3 => (0 T0 1 T1 2 T2)
[INFO] [stderr] ...   |
[INFO] [stderr] 568 | |     16 TupleVisitor16 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14 15 T15)
[INFO] [stderr] 569 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:615:47
[INFO] [stderr]     |
[INFO] [stderr] 615 |                           while let Some(key) = try!($access.next_key_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                                 ^^^
[INFO] [stderr] ...
[INFO] [stderr] 632 | / map_impl!(
[INFO] [stderr] 633 | |     BTreeMap<K: Ord, V>,
[INFO] [stderr] 634 | |     map,
[INFO] [stderr] 635 | |     BTreeMap::new(),
[INFO] [stderr] 636 | |     BTreeMap::new());
[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]    --> src/de/seed_impls.rs:616:41
[INFO] [stderr]     |
[INFO] [stderr] 616 |                               let value = try!($access.next_value_seed(Seed::new(&mut *self.seed)));
[INFO] [stderr]     |                                           ^^^
[INFO] [stderr] ...
[INFO] [stderr] 632 | / map_impl!(
[INFO] [stderr] 633 | |     BTreeMap<K: Ord, V>,
[INFO] [stderr] 634 | |     map,
[INFO] [stderr] 635 | |     BTreeMap::new(),
[INFO] [stderr] 636 | |     BTreeMap::new());
[INFO] [stderr]     | |_____________________- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:615:47
[INFO] [stderr]     |
[INFO] [stderr] 615 |                           while let Some(key) = try!($access.next_key_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                                 ^^^
[INFO] [stderr] ...
[INFO] [stderr] 639 | / map_impl!(
[INFO] [stderr] 640 | |     HashMap<K: Eq + Hash, V, S: BuildHasher + Default>,
[INFO] [stderr] 641 | |     map,
[INFO] [stderr] 642 | |     HashMap::with_hasher(S::default()),
[INFO] [stderr] 643 | |     HashMap::with_capacity_and_hasher(size_hint::cautious(map.size_hint()), S::default()));
[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]    --> src/de/seed_impls.rs:616:41
[INFO] [stderr]     |
[INFO] [stderr] 616 |                               let value = try!($access.next_value_seed(Seed::new(&mut *self.seed)));
[INFO] [stderr]     |                                           ^^^
[INFO] [stderr] ...
[INFO] [stderr] 639 | / map_impl!(
[INFO] [stderr] 640 | |     HashMap<K: Eq + Hash, V, S: BuildHasher + Default>,
[INFO] [stderr] 641 | |     map,
[INFO] [stderr] 642 | |     HashMap::with_hasher(S::default()),
[INFO] [stderr] 643 | |     HashMap::with_capacity_and_hasher(size_hint::cautious(map.size_hint()), S::default()));
[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]    --> src/de/seed_impls.rs:777:40
[INFO] [stderr]     |
[INFO] [stderr] 777 |                 let start: Idx = match try!(seq.next_element_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:783:38
[INFO] [stderr]     |
[INFO] [stderr] 783 |                 let end: Idx = match try!(seq.next_element_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:798:39
[INFO] [stderr]     |
[INFO] [stderr] 798 |                 while let Some(key) = try!(map.next_key()) {
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:804:42
[INFO] [stderr]     |
[INFO] [stderr] 804 | ...                   start = Some(try!(map.next_value_seed(Seed::new(&mut *self.seed))));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:810:40
[INFO] [stderr]     |
[INFO] [stderr] 810 | ...                   end = Some(try!(map.next_value_seed(Seed::new(&mut *self.seed))));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:966:23
[INFO] [stderr]     |
[INFO] [stderr] 966 |                 match try!(data.variant()) {
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/ser/seed_impls.rs:86:35
[INFO] [stderr]     |
[INFO] [stderr] 86  |                       let mut seq = try!(serializer.serialize_tuple($len));
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] ...
[INFO] [stderr] 97  | / array_impls!(01 02 03 04 05 06 07 08 09 10
[INFO] [stderr] 98  | |              11 12 13 14 15 16 17 18 19 20
[INFO] [stderr] 99  | |              21 22 23 24 25 26 27 28 29 30
[INFO] [stderr] 100 | |              31 32);
[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]    --> src/ser/seed_impls.rs:88:25
[INFO] [stderr]     |
[INFO] [stderr] 88  |                           try!(seq.serialize_element(&Seeded::new(seed, e)));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] ...
[INFO] [stderr] 97  | / array_impls!(01 02 03 04 05 06 07 08 09 10
[INFO] [stderr] 98  | |              11 12 13 14 15 16 17 18 19 20
[INFO] [stderr] 99  | |              21 22 23 24 25 26 27 28 29 30
[INFO] [stderr] 100 | |              31 32);
[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]    --> src/ser/seed_impls.rs:166:25
[INFO] [stderr]     |
[INFO] [stderr] 166 |         let mut state = try!(serializer.serialize_struct("Range", 2));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/ser/seed_impls.rs:167:9
[INFO] [stderr]     |
[INFO] [stderr] 167 |         try!(state.serialize_field("start", &Seeded::new(seed, &self.start)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/ser/seed_impls.rs:168:9
[INFO] [stderr]     |
[INFO] [stderr] 168 |         try!(state.serialize_field("end", &Seeded::new(seed, &self.end)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/ser/seed_impls.rs:187:37
[INFO] [stderr]     |
[INFO] [stderr] 187 |                       let mut tuple = try!(serializer.serialize_tuple($len));
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr] ...
[INFO] [stderr] 198 | / tuple_impls! {
[INFO] [stderr] 199 | |     Seed;
[INFO] [stderr] 200 | |     1 => (0 T0)
[INFO] [stderr] 201 | |     2 => (0 T0 1 T1)
[INFO] [stderr] ...   |
[INFO] [stderr] 215 | |     16 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14 15 T15)
[INFO] [stderr] 216 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/ser/seed_impls.rs:189:25
[INFO] [stderr]     |
[INFO] [stderr] 189 |                           try!(tuple.serialize_element(&Seeded::new(seed, &self.$n)));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] ...
[INFO] [stderr] 198 | / tuple_impls! {
[INFO] [stderr] 199 | |     Seed;
[INFO] [stderr] 200 | |     1 => (0 T0)
[INFO] [stderr] 201 | |     2 => (0 T0 1 T1)
[INFO] [stderr] ...   |
[INFO] [stderr] 215 | |     16 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14 15 T15)
[INFO] [stderr] 216 | | }
[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]    --> src/private/de.rs:485:33
[INFO] [stderr]     |
[INFO] [stderr] 485 |             while let Some(e) = try!(visitor.next_element()) {
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/de.rs:496:34
[INFO] [stderr]     |
[INFO] [stderr] 496 |             while let Some(kv) = try!(visitor.next_entry()) {
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/de.rs:849:17
[INFO] [stderr]     |
[INFO] [stderr] 849 |                 try!(visitor.next_key_seed(TagOrContentVisitor::new(self.tag_name))) {
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/de.rs:855:36
[INFO] [stderr]     |
[INFO] [stderr] 855 |                         tag = Some(try!(visitor.next_value()));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/de.rs:858:33
[INFO] [stderr]     |
[INFO] [stderr] 858 |                         let v = try!(visitor.next_value());
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1013:33
[INFO] [stderr]      |
[INFO] [stderr] 1013 |                     let value = try!(visitor.visit_seq(&mut seq_visitor));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1014:21
[INFO] [stderr]      |
[INFO] [stderr] 1014 |                     try!(seq_visitor.end());
[INFO] [stderr]      |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1023:33
[INFO] [stderr]      |
[INFO] [stderr] 1023 |                     let value = try!(visitor.visit_map(&mut map_visitor));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1024:21
[INFO] [stderr]      |
[INFO] [stderr] 1024 |                     try!(map_visitor.end());
[INFO] [stderr]      |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1247:27
[INFO] [stderr]      |
[INFO] [stderr] 1247 |                 let ret = try!(visitor.visit_seq(&mut self));
[INFO] [stderr]      |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1409:33
[INFO] [stderr]      |
[INFO] [stderr] 1409 |                     let value = try!(visitor.visit_seq(&mut seq_visitor));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1410:21
[INFO] [stderr]      |
[INFO] [stderr] 1410 |                     try!(seq_visitor.end());
[INFO] [stderr]      |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1421:33
[INFO] [stderr]      |
[INFO] [stderr] 1421 |                     let value = try!(visitor.visit_map(&mut map_visitor));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1422:21
[INFO] [stderr]      |
[INFO] [stderr] 1422 |                     try!(map_visitor.end());
[INFO] [stderr]      |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1641:27
[INFO] [stderr]      |
[INFO] [stderr] 1641 |                 let ret = try!(visitor.visit_seq(&mut self));
[INFO] [stderr]      |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:206:23
[INFO] [stderr]     |
[INFO] [stderr] 206 |         let mut map = try!(self.delegate.serialize_map(Some(2)));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:207:9
[INFO] [stderr]     |
[INFO] [stderr] 207 |         try!(map.serialize_entry(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:208:9
[INFO] [stderr]     |
[INFO] [stderr] 208 |         try!(map.serialize_entry(inner_variant, &()));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:233:23
[INFO] [stderr]     |
[INFO] [stderr] 233 |         let mut map = try!(self.delegate.serialize_map(Some(2)));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:234:9
[INFO] [stderr]     |
[INFO] [stderr] 234 |         try!(map.serialize_entry(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:235:9
[INFO] [stderr]     |
[INFO] [stderr] 235 |         try!(map.serialize_entry(inner_variant, inner_value));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:276:23
[INFO] [stderr]     |
[INFO] [stderr] 276 |         let mut map = try!(self.delegate.serialize_map(Some(2)));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:277:9
[INFO] [stderr]     |
[INFO] [stderr] 277 |         try!(map.serialize_entry(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:278:9
[INFO] [stderr]     |
[INFO] [stderr] 278 |         try!(map.serialize_key(inner_variant));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:287:23
[INFO] [stderr]     |
[INFO] [stderr] 287 |         let mut map = try!(self.delegate.serialize_map(len.map(|len| len + 1)));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:288:9
[INFO] [stderr]     |
[INFO] [stderr] 288 |         try!(map.serialize_entry(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:297:25
[INFO] [stderr]     |
[INFO] [stderr] 297 |         let mut state = try!(self.delegate.serialize_struct(name, len + 1));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:298:9
[INFO] [stderr]     |
[INFO] [stderr] 298 |         try!(state.serialize_field(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:323:23
[INFO] [stderr]     |
[INFO] [stderr] 323 |         let mut map = try!(self.delegate.serialize_map(Some(2)));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:324:9
[INFO] [stderr]     |
[INFO] [stderr] 324 |         try!(map.serialize_entry(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:325:9
[INFO] [stderr]     |
[INFO] [stderr] 325 |         try!(map.serialize_key(inner_variant));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:403:25
[INFO] [stderr]     |
[INFO] [stderr] 403 |             let value = try!(value.serialize(ContentSerializer::<M::Error>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:409:13
[INFO] [stderr]     |
[INFO] [stderr] 409 |             try!(
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:448:25
[INFO] [stderr]     |
[INFO] [stderr] 448 |             let value = try!(value.serialize(ContentSerializer::<M::Error>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:454:13
[INFO] [stderr]     |
[INFO] [stderr] 454 |             try!(
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:538:37
[INFO] [stderr]     |
[INFO] [stderr] 538 |                     let mut tuple = try!(serializer.serialize_tuple(elements.len()));
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:540:25
[INFO] [stderr]     |
[INFO] [stderr] 540 |                         try!(tuple.serialize_element(e));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:546:34
[INFO] [stderr]     |
[INFO] [stderr] 546 |                     let mut ts = try!(serializer.serialize_tuple_struct(n, fields.len()));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:548:25
[INFO] [stderr]     |
[INFO] [stderr] 548 |                         try!(ts.serialize_field(f));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:554:34
[INFO] [stderr]     |
[INFO] [stderr] 554 |                     let mut tv = try!(serializer.serialize_tuple_variant(n, i, v, fields.len()));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:556:25
[INFO] [stderr]     |
[INFO] [stderr] 556 |                         try!(tv.serialize_field(f));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:562:35
[INFO] [stderr]     |
[INFO] [stderr] 562 |                     let mut map = try!(serializer.serialize_map(Some(entries.len())));
[INFO] [stderr]     |                                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:564:25
[INFO] [stderr]     |
[INFO] [stderr] 564 |                         try!(map.serialize_entry(k, v));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:570:33
[INFO] [stderr]     |
[INFO] [stderr] 570 |                     let mut s = try!(serializer.serialize_struct(n, fields.len()));
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:572:25
[INFO] [stderr]     |
[INFO] [stderr] 572 |                         try!(s.serialize_field(k, v));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:578:34
[INFO] [stderr]     |
[INFO] [stderr] 578 |                     let mut sv = try!(serializer.serialize_struct_variant(n, i, v, fields.len()));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:580:25
[INFO] [stderr]     |
[INFO] [stderr] 580 |                         try!(sv.serialize_field(k, v));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:677:39
[INFO] [stderr]     |
[INFO] [stderr] 677 |             Ok(Content::Some(Box::new(try!(value.serialize(self)))))
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:707:26
[INFO] [stderr]     |
[INFO] [stderr] 707 |                 Box::new(try!(value.serialize(self))),
[INFO] [stderr]     |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:725:26
[INFO] [stderr]     |
[INFO] [stderr] 725 |                 Box::new(try!(value.serialize(self))),
[INFO] [stderr]     |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:824:25
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:850:25
[INFO] [stderr]     |
[INFO] [stderr] 850 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:877:25
[INFO] [stderr]     |
[INFO] [stderr] 877 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:906:25
[INFO] [stderr]     |
[INFO] [stderr] 906 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:938:23
[INFO] [stderr]     |
[INFO] [stderr] 938 |             let key = try!(key.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:951:25
[INFO] [stderr]     |
[INFO] [stderr] 951 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:965:23
[INFO] [stderr]     |
[INFO] [stderr] 965 |             let key = try!(key.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:966:25
[INFO] [stderr]     |
[INFO] [stderr] 966 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:989:25
[INFO] [stderr]     |
[INFO] [stderr] 989 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/ser.rs:1018:25
[INFO] [stderr]      |
[INFO] [stderr] 1018 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]      |                         ^^^
[INFO] [stderr] 
[INFO] [stderr]     Checking serde_json v1.0.52
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr] warning: 81 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling serde_derive_state v0.4.9
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:176:41
[INFO] [stderr]     |
[INFO] [stderr] 176 |                 while let Some(value) = try!(access.next_element_seed(self.seed.clone())) {
[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]    --> src/de/seed_impls.rs:231:33
[INFO] [stderr]     |
[INFO] [stderr] 231 |         while let Some(value) = try!(access.next_element_seed(Seed::new(&mut *&mut *self.seed))) {
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:439:43
[INFO] [stderr]     |
[INFO] [stderr] 439 |                           let $name = match try!(seq.next_element_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                             ^^^
[INFO] [stderr] ...
[INFO] [stderr] 464 | / array_impls! {
[INFO] [stderr] 465 | |     1 => (0 a)
[INFO] [stderr] 466 | |     2 => (0 a 1 b)
[INFO] [stderr] 467 | |     3 => (0 a 1 b 2 c)
[INFO] [stderr] ...   |
[INFO] [stderr] 496 | |     32 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26 aa 27 ab 28 ac 29 ad 30 ae 31 af)
[INFO] [stderr] 497 | | }
[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]    --> src/de/seed_impls.rs:529:43
[INFO] [stderr]     |
[INFO] [stderr] 529 |                           let $name = match try!(seq.next_element_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                             ^^^
[INFO] [stderr] ...
[INFO] [stderr] 552 | / tuple_impls! {
[INFO] [stderr] 553 | |     1 TupleVisitor1 => (0 T0)
[INFO] [stderr] 554 | |     2 TupleVisitor2 => (0 T0 1 T1)
[INFO] [stderr] 555 | |     3 TupleVisitor3 => (0 T0 1 T1 2 T2)
[INFO] [stderr] ...   |
[INFO] [stderr] 568 | |     16 TupleVisitor16 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14 15 T15)
[INFO] [stderr] 569 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:615:47
[INFO] [stderr]     |
[INFO] [stderr] 615 |                           while let Some(key) = try!($access.next_key_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                                 ^^^
[INFO] [stderr] ...
[INFO] [stderr] 632 | / map_impl!(
[INFO] [stderr] 633 | |     BTreeMap<K: Ord, V>,
[INFO] [stderr] 634 | |     map,
[INFO] [stderr] 635 | |     BTreeMap::new(),
[INFO] [stderr] 636 | |     BTreeMap::new());
[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]    --> src/de/seed_impls.rs:616:41
[INFO] [stderr]     |
[INFO] [stderr] 616 |                               let value = try!($access.next_value_seed(Seed::new(&mut *self.seed)));
[INFO] [stderr]     |                                           ^^^
[INFO] [stderr] ...
[INFO] [stderr] 632 | / map_impl!(
[INFO] [stderr] 633 | |     BTreeMap<K: Ord, V>,
[INFO] [stderr] 634 | |     map,
[INFO] [stderr] 635 | |     BTreeMap::new(),
[INFO] [stderr] 636 | |     BTreeMap::new());
[INFO] [stderr]     | |_____________________- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:615:47
[INFO] [stderr]     |
[INFO] [stderr] 615 |                           while let Some(key) = try!($access.next_key_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                                 ^^^
[INFO] [stderr] ...
[INFO] [stderr] 639 | / map_impl!(
[INFO] [stderr] 640 | |     HashMap<K: Eq + Hash, V, S: BuildHasher + Default>,
[INFO] [stderr] 641 | |     map,
[INFO] [stderr] 642 | |     HashMap::with_hasher(S::default()),
[INFO] [stderr] 643 | |     HashMap::with_capacity_and_hasher(size_hint::cautious(map.size_hint()), S::default()));
[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]    --> src/de/seed_impls.rs:616:41
[INFO] [stderr]     |
[INFO] [stderr] 616 |                               let value = try!($access.next_value_seed(Seed::new(&mut *self.seed)));
[INFO] [stderr]     |                                           ^^^
[INFO] [stderr] ...
[INFO] [stderr] 639 | / map_impl!(
[INFO] [stderr] 640 | |     HashMap<K: Eq + Hash, V, S: BuildHasher + Default>,
[INFO] [stderr] 641 | |     map,
[INFO] [stderr] 642 | |     HashMap::with_hasher(S::default()),
[INFO] [stderr] 643 | |     HashMap::with_capacity_and_hasher(size_hint::cautious(map.size_hint()), S::default()));
[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]    --> src/de/seed_impls.rs:777:40
[INFO] [stderr]     |
[INFO] [stderr] 777 |                 let start: Idx = match try!(seq.next_element_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:783:38
[INFO] [stderr]     |
[INFO] [stderr] 783 |                 let end: Idx = match try!(seq.next_element_seed(Seed::new(&mut *self.seed))) {
[INFO] [stderr]     |                                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:798:39
[INFO] [stderr]     |
[INFO] [stderr] 798 |                 while let Some(key) = try!(map.next_key()) {
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:804:42
[INFO] [stderr]     |
[INFO] [stderr] 804 | ...                   start = Some(try!(map.next_value_seed(Seed::new(&mut *self.seed))));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:810:40
[INFO] [stderr]     |
[INFO] [stderr] 810 | ...                   end = Some(try!(map.next_value_seed(Seed::new(&mut *self.seed))));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/de/seed_impls.rs:966:23
[INFO] [stderr]     |
[INFO] [stderr] 966 |                 match try!(data.variant()) {
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/ser/seed_impls.rs:86:35
[INFO] [stderr]     |
[INFO] [stderr] 86  |                       let mut seq = try!(serializer.serialize_tuple($len));
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] ...
[INFO] [stderr] 97  | / array_impls!(01 02 03 04 05 06 07 08 09 10
[INFO] [stderr] 98  | |              11 12 13 14 15 16 17 18 19 20
[INFO] [stderr] 99  | |              21 22 23 24 25 26 27 28 29 30
[INFO] [stderr] 100 | |              31 32);
[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]    --> src/ser/seed_impls.rs:88:25
[INFO] [stderr]     |
[INFO] [stderr] 88  |                           try!(seq.serialize_element(&Seeded::new(seed, e)));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] ...
[INFO] [stderr] 97  | / array_impls!(01 02 03 04 05 06 07 08 09 10
[INFO] [stderr] 98  | |              11 12 13 14 15 16 17 18 19 20
[INFO] [stderr] 99  | |              21 22 23 24 25 26 27 28 29 30
[INFO] [stderr] 100 | |              31 32);
[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]    --> src/ser/seed_impls.rs:166:25
[INFO] [stderr]     |
[INFO] [stderr] 166 |         let mut state = try!(serializer.serialize_struct("Range", 2));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/ser/seed_impls.rs:167:9
[INFO] [stderr]     |
[INFO] [stderr] 167 |         try!(state.serialize_field("start", &Seeded::new(seed, &self.start)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/ser/seed_impls.rs:168:9
[INFO] [stderr]     |
[INFO] [stderr] 168 |         try!(state.serialize_field("end", &Seeded::new(seed, &self.end)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/ser/seed_impls.rs:187:37
[INFO] [stderr]     |
[INFO] [stderr] 187 |                       let mut tuple = try!(serializer.serialize_tuple($len));
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr] ...
[INFO] [stderr] 198 | / tuple_impls! {
[INFO] [stderr] 199 | |     Seed;
[INFO] [stderr] 200 | |     1 => (0 T0)
[INFO] [stderr] 201 | |     2 => (0 T0 1 T1)
[INFO] [stderr] ...   |
[INFO] [stderr] 215 | |     16 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14 15 T15)
[INFO] [stderr] 216 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/ser/seed_impls.rs:189:25
[INFO] [stderr]     |
[INFO] [stderr] 189 |                           try!(tuple.serialize_element(&Seeded::new(seed, &self.$n)));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] ...
[INFO] [stderr] 198 | / tuple_impls! {
[INFO] [stderr] 199 | |     Seed;
[INFO] [stderr] 200 | |     1 => (0 T0)
[INFO] [stderr] 201 | |     2 => (0 T0 1 T1)
[INFO] [stderr] ...   |
[INFO] [stderr] 215 | |     16 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14 15 T15)
[INFO] [stderr] 216 | | }
[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]    --> src/private/de.rs:485:33
[INFO] [stderr]     |
[INFO] [stderr] 485 |             while let Some(e) = try!(visitor.next_element()) {
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/de.rs:496:34
[INFO] [stderr]     |
[INFO] [stderr] 496 |             while let Some(kv) = try!(visitor.next_entry()) {
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/de.rs:849:17
[INFO] [stderr]     |
[INFO] [stderr] 849 |                 try!(visitor.next_key_seed(TagOrContentVisitor::new(self.tag_name))) {
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/de.rs:855:36
[INFO] [stderr]     |
[INFO] [stderr] 855 |                         tag = Some(try!(visitor.next_value()));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/de.rs:858:33
[INFO] [stderr]     |
[INFO] [stderr] 858 |                         let v = try!(visitor.next_value());
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1013:33
[INFO] [stderr]      |
[INFO] [stderr] 1013 |                     let value = try!(visitor.visit_seq(&mut seq_visitor));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1014:21
[INFO] [stderr]      |
[INFO] [stderr] 1014 |                     try!(seq_visitor.end());
[INFO] [stderr]      |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1023:33
[INFO] [stderr]      |
[INFO] [stderr] 1023 |                     let value = try!(visitor.visit_map(&mut map_visitor));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1024:21
[INFO] [stderr]      |
[INFO] [stderr] 1024 |                     try!(map_visitor.end());
[INFO] [stderr]      |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1247:27
[INFO] [stderr]      |
[INFO] [stderr] 1247 |                 let ret = try!(visitor.visit_seq(&mut self));
[INFO] [stderr]      |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1409:33
[INFO] [stderr]      |
[INFO] [stderr] 1409 |                     let value = try!(visitor.visit_seq(&mut seq_visitor));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1410:21
[INFO] [stderr]      |
[INFO] [stderr] 1410 |                     try!(seq_visitor.end());
[INFO] [stderr]      |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1421:33
[INFO] [stderr]      |
[INFO] [stderr] 1421 |                     let value = try!(visitor.visit_map(&mut map_visitor));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1422:21
[INFO] [stderr]      |
[INFO] [stderr] 1422 |                     try!(map_visitor.end());
[INFO] [stderr]      |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/de.rs:1641:27
[INFO] [stderr]      |
[INFO] [stderr] 1641 |                 let ret = try!(visitor.visit_seq(&mut self));
[INFO] [stderr]      |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:206:23
[INFO] [stderr]     |
[INFO] [stderr] 206 |         let mut map = try!(self.delegate.serialize_map(Some(2)));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:207:9
[INFO] [stderr]     |
[INFO] [stderr] 207 |         try!(map.serialize_entry(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:208:9
[INFO] [stderr]     |
[INFO] [stderr] 208 |         try!(map.serialize_entry(inner_variant, &()));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:233:23
[INFO] [stderr]     |
[INFO] [stderr] 233 |         let mut map = try!(self.delegate.serialize_map(Some(2)));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:234:9
[INFO] [stderr]     |
[INFO] [stderr] 234 |         try!(map.serialize_entry(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:235:9
[INFO] [stderr]     |
[INFO] [stderr] 235 |         try!(map.serialize_entry(inner_variant, inner_value));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:276:23
[INFO] [stderr]     |
[INFO] [stderr] 276 |         let mut map = try!(self.delegate.serialize_map(Some(2)));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:277:9
[INFO] [stderr]     |
[INFO] [stderr] 277 |         try!(map.serialize_entry(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:278:9
[INFO] [stderr]     |
[INFO] [stderr] 278 |         try!(map.serialize_key(inner_variant));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:287:23
[INFO] [stderr]     |
[INFO] [stderr] 287 |         let mut map = try!(self.delegate.serialize_map(len.map(|len| len + 1)));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:288:9
[INFO] [stderr]     |
[INFO] [stderr] 288 |         try!(map.serialize_entry(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:297:25
[INFO] [stderr]     |
[INFO] [stderr] 297 |         let mut state = try!(self.delegate.serialize_struct(name, len + 1));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:298:9
[INFO] [stderr]     |
[INFO] [stderr] 298 |         try!(state.serialize_field(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:323:23
[INFO] [stderr]     |
[INFO] [stderr] 323 |         let mut map = try!(self.delegate.serialize_map(Some(2)));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:324:9
[INFO] [stderr]     |
[INFO] [stderr] 324 |         try!(map.serialize_entry(self.tag, self.variant_name));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:325:9
[INFO] [stderr]     |
[INFO] [stderr] 325 |         try!(map.serialize_key(inner_variant));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:403:25
[INFO] [stderr]     |
[INFO] [stderr] 403 |             let value = try!(value.serialize(ContentSerializer::<M::Error>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:409:13
[INFO] [stderr]     |
[INFO] [stderr] 409 |             try!(
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:448:25
[INFO] [stderr]     |
[INFO] [stderr] 448 |             let value = try!(value.serialize(ContentSerializer::<M::Error>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:454:13
[INFO] [stderr]     |
[INFO] [stderr] 454 |             try!(
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:538:37
[INFO] [stderr]     |
[INFO] [stderr] 538 |                     let mut tuple = try!(serializer.serialize_tuple(elements.len()));
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:540:25
[INFO] [stderr]     |
[INFO] [stderr] 540 |                         try!(tuple.serialize_element(e));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:546:34
[INFO] [stderr]     |
[INFO] [stderr] 546 |                     let mut ts = try!(serializer.serialize_tuple_struct(n, fields.len()));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:548:25
[INFO] [stderr]     |
[INFO] [stderr] 548 |                         try!(ts.serialize_field(f));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:554:34
[INFO] [stderr]     |
[INFO] [stderr] 554 |                     let mut tv = try!(serializer.serialize_tuple_variant(n, i, v, fields.len()));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:556:25
[INFO] [stderr]     |
[INFO] [stderr] 556 |                         try!(tv.serialize_field(f));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:562:35
[INFO] [stderr]     |
[INFO] [stderr] 562 |                     let mut map = try!(serializer.serialize_map(Some(entries.len())));
[INFO] [stderr]     |                                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:564:25
[INFO] [stderr]     |
[INFO] [stderr] 564 |                         try!(map.serialize_entry(k, v));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:570:33
[INFO] [stderr]     |
[INFO] [stderr] 570 |                     let mut s = try!(serializer.serialize_struct(n, fields.len()));
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:572:25
[INFO] [stderr]     |
[INFO] [stderr] 572 |                         try!(s.serialize_field(k, v));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:578:34
[INFO] [stderr]     |
[INFO] [stderr] 578 |                     let mut sv = try!(serializer.serialize_struct_variant(n, i, v, fields.len()));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:580:25
[INFO] [stderr]     |
[INFO] [stderr] 580 |                         try!(sv.serialize_field(k, v));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:677:39
[INFO] [stderr]     |
[INFO] [stderr] 677 |             Ok(Content::Some(Box::new(try!(value.serialize(self)))))
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:707:26
[INFO] [stderr]     |
[INFO] [stderr] 707 |                 Box::new(try!(value.serialize(self))),
[INFO] [stderr]     |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:725:26
[INFO] [stderr]     |
[INFO] [stderr] 725 |                 Box::new(try!(value.serialize(self))),
[INFO] [stderr]     |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:824:25
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:850:25
[INFO] [stderr]     |
[INFO] [stderr] 850 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:877:25
[INFO] [stderr]     |
[INFO] [stderr] 877 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:906:25
[INFO] [stderr]     |
[INFO] [stderr] 906 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:938:23
[INFO] [stderr]     |
[INFO] [stderr] 938 |             let key = try!(key.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:951:25
[INFO] [stderr]     |
[INFO] [stderr] 951 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:965:23
[INFO] [stderr]     |
[INFO] [stderr] 965 |             let key = try!(key.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:966:25
[INFO] [stderr]     |
[INFO] [stderr] 966 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/private/ser.rs:989:25
[INFO] [stderr]     |
[INFO] [stderr] 989 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]     --> src/private/ser.rs:1018:25
[INFO] [stderr]      |
[INFO] [stderr] 1018 |             let value = try!(value.serialize(ContentSerializer::<E>::new()));
[INFO] [stderr]      |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 81 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 44.83s
[INFO] running `"docker" "inspect" "05651919eb33db1b6f387ec6e4a09e6d8a6f2365e01c2e4d36c867031fbaa473"`
[INFO] running `"docker" "rm" "-f" "05651919eb33db1b6f387ec6e4a09e6d8a6f2365e01c2e4d36c867031fbaa473"`
[INFO] [stdout] 05651919eb33db1b6f387ec6e4a09e6d8a6f2365e01c2e4d36c867031fbaa473