[INFO] crate strason 0.4.0 is already in cache
[INFO] checking strason-0.4.0 against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] extracting crate strason 0.4.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate strason 0.4.0 on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate strason 0.4.0
[INFO] finished tweaking crates.io crate strason 0.4.0
[INFO] tweaked toml for crates.io crate strason 0.4.0 written to /workspace/builds/worker-2/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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 605a371a26ae4cf731079c93c5b4ed774717adbd10f2afba6028195bd69cb613
[INFO] running `"docker" "start" "-a" "605a371a26ae4cf731079c93c5b4ed774717adbd10f2afba6028195bd69cb613"`
[INFO] [stderr]     Checking serde_json v1.0.52
[INFO] [stderr]     Checking strason v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     try!(w.write(b"\""));
[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/serializer.rs:26:25
[INFO] [stderr]    |
[INFO] [stderr] 26 |             '\x07' => { try!(w.write(b"\\b")); }
[INFO] [stderr]    |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:27:25
[INFO] [stderr]    |
[INFO] [stderr] 27 |             '\x0c' => { try!(w.write(b"\\f")); }
[INFO] [stderr]    |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:28:23
[INFO] [stderr]    |
[INFO] [stderr] 28 |             '\n' => { try!(w.write(b"\\n")); }
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:29:23
[INFO] [stderr]    |
[INFO] [stderr] 29 |             '\r' => { try!(w.write(b"\\r")); }
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:30:23
[INFO] [stderr]    |
[INFO] [stderr] 30 |             '\t' => { try!(w.write(b"\\t")); }
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:23
[INFO] [stderr]    |
[INFO] [stderr] 31 |             '\\' => { try!(w.write(b"\\\\")); }
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:22
[INFO] [stderr]    |
[INFO] [stderr] 32 |             '"' => { try!(w.write(b"\\\"")); }
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:34
[INFO] [stderr]    |
[INFO] [stderr] 33 |             '\x20'...'\x7e' => { try!(w.write(&[ch as u8])); }
[INFO] [stderr]    |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:39:21
[INFO] [stderr]    |
[INFO] [stderr] 39 |                     try!(write!(w, "\\u{:02x}{:02x}", word >> 8 as u8, word as u8));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     try!(w.write(b"\""));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:53:30
[INFO] [stderr]    |
[INFO] [stderr] 53 |         JsonInner::Null => { try!(w.write(b"null")); }
[INFO] [stderr]    |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:54:36
[INFO] [stderr]    |
[INFO] [stderr] 54 |         JsonInner::Bool(true) => { try!(w.write(b"true")); }
[INFO] [stderr]    |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:55:37
[INFO] [stderr]    |
[INFO] [stderr] 55 |         JsonInner::Bool(false) => { try!(w.write(b"false")); }
[INFO] [stderr]    |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:56:39
[INFO] [stderr]    |
[INFO] [stderr] 56 |         JsonInner::Number(ref s) => { try!(w.write(s.as_bytes())); }
[INFO] [stderr]    |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:57:39
[INFO] [stderr]    |
[INFO] [stderr] 57 |         JsonInner::String(ref s) => { try!(serialize_string(&s[..], &mut *w)); }
[INFO] [stderr]    |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |             try!(w.write(b"["));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:63:21
[INFO] [stderr]    |
[INFO] [stderr] 63 |                     try!(w.write(b", "));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:65:17
[INFO] [stderr]    |
[INFO] [stderr] 65 |                 try!(serialize(elem, &mut *w));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |             try!(w.write(b"]"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |             try!(w.write(b"{"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:75:21
[INFO] [stderr]    |
[INFO] [stderr] 75 |                     try!(w.write(b", "));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:77:17
[INFO] [stderr]    |
[INFO] [stderr] 77 |                 try!(serialize_string(key, &mut *w));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:78:17
[INFO] [stderr]    |
[INFO] [stderr] 78 |                 try!(w.write(b": "));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:79:17
[INFO] [stderr]    |
[INFO] [stderr] 79 |                 try!(serialize(val, &mut *w));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |             try!(w.write(b"}"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:99:32
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/parser.rs:245:22
[INFO] [stderr]     |
[INFO] [stderr] 245 |                 b'0' ... b'9' => {
[INFO] [stderr]     |                      ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/parser.rs:410:25
[INFO] [stderr]     |
[INFO] [stderr] 410 |             b'-' | b'0' ... b'9' => {
[INFO] [stderr]     |                         ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:19
[INFO] [stderr]    |
[INFO] [stderr] 33 |             '\x20'...'\x7e' => { try!(w.write(&[ch as u8])); }
[INFO] [stderr]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:63:32
[INFO] [stderr]    |
[INFO] [stderr] 63 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:81:21
[INFO] [stderr]    |
[INFO] [stderr] 81 |         f.write_str(error::Error::description(self))
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/parser.rs:93:62
[INFO] [stderr]    |
[INFO] [stderr] 93 |             _ => write!(f, "{}:{}: {}", self.line, self.col, error::Error::description(self))
[INFO] [stderr]    |                                                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/parser.rs:115:42
[INFO] [stderr]     |
[INFO] [stderr] 115 |             ErrorType::Unicode(ref e) => error::Error::description(e),
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/parser.rs:117:37
[INFO] [stderr]     |
[INFO] [stderr] 117 |             ErrorType::Io(ref e) => error::Error::description(e),
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:72:44
[INFO] [stderr]    |
[INFO] [stderr] 72 |             ErrorInner::Parser(ref e) => e.description(),
[INFO] [stderr]    |                                            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/sentinel.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     err.description().as_ptr() == SENTINEL_STR.as_ptr()
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/sentinel.rs:82:9
[INFO] [stderr]    |
[INFO] [stderr] 82 |     err.description().as_ptr() == SENTINEL_STR.as_ptr()
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 38 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     try!(w.write(b"\""));
[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/serializer.rs:26:25
[INFO] [stderr]    |
[INFO] [stderr] 26 |             '\x07' => { try!(w.write(b"\\b")); }
[INFO] [stderr]    |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:27:25
[INFO] [stderr]    |
[INFO] [stderr] 27 |             '\x0c' => { try!(w.write(b"\\f")); }
[INFO] [stderr]    |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:28:23
[INFO] [stderr]    |
[INFO] [stderr] 28 |             '\n' => { try!(w.write(b"\\n")); }
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:29:23
[INFO] [stderr]    |
[INFO] [stderr] 29 |             '\r' => { try!(w.write(b"\\r")); }
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:30:23
[INFO] [stderr]    |
[INFO] [stderr] 30 |             '\t' => { try!(w.write(b"\\t")); }
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:23
[INFO] [stderr]    |
[INFO] [stderr] 31 |             '\\' => { try!(w.write(b"\\\\")); }
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:22
[INFO] [stderr]    |
[INFO] [stderr] 32 |             '"' => { try!(w.write(b"\\\"")); }
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:34
[INFO] [stderr]    |
[INFO] [stderr] 33 |             '\x20'...'\x7e' => { try!(w.write(&[ch as u8])); }
[INFO] [stderr]    |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:39:21
[INFO] [stderr]    |
[INFO] [stderr] 39 |                     try!(write!(w, "\\u{:02x}{:02x}", word >> 8 as u8, word as u8));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     try!(w.write(b"\""));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:53:30
[INFO] [stderr]    |
[INFO] [stderr] 53 |         JsonInner::Null => { try!(w.write(b"null")); }
[INFO] [stderr]    |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:54:36
[INFO] [stderr]    |
[INFO] [stderr] 54 |         JsonInner::Bool(true) => { try!(w.write(b"true")); }
[INFO] [stderr]    |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:55:37
[INFO] [stderr]    |
[INFO] [stderr] 55 |         JsonInner::Bool(false) => { try!(w.write(b"false")); }
[INFO] [stderr]    |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:56:39
[INFO] [stderr]    |
[INFO] [stderr] 56 |         JsonInner::Number(ref s) => { try!(w.write(s.as_bytes())); }
[INFO] [stderr]    |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:57:39
[INFO] [stderr]    |
[INFO] [stderr] 57 |         JsonInner::String(ref s) => { try!(serialize_string(&s[..], &mut *w)); }
[INFO] [stderr]    |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |             try!(w.write(b"["));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:63:21
[INFO] [stderr]    |
[INFO] [stderr] 63 |                     try!(w.write(b", "));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:65:17
[INFO] [stderr]    |
[INFO] [stderr] 65 |                 try!(serialize(elem, &mut *w));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |             try!(w.write(b"]"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |             try!(w.write(b"{"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:75:21
[INFO] [stderr]    |
[INFO] [stderr] 75 |                     try!(w.write(b", "));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:77:17
[INFO] [stderr]    |
[INFO] [stderr] 77 |                 try!(serialize_string(key, &mut *w));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:78:17
[INFO] [stderr]    |
[INFO] [stderr] 78 |                 try!(w.write(b": "));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:79:17
[INFO] [stderr]    |
[INFO] [stderr] 79 |                 try!(serialize(val, &mut *w));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |             try!(w.write(b"}"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:99:32
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/parser.rs:245:22
[INFO] [stderr]     |
[INFO] [stderr] 245 |                 b'0' ... b'9' => {
[INFO] [stderr]     |                      ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/parser.rs:410:25
[INFO] [stderr]     |
[INFO] [stderr] 410 |             b'-' | b'0' ... b'9' => {
[INFO] [stderr]     |                         ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:19
[INFO] [stderr]    |
[INFO] [stderr] 33 |             '\x20'...'\x7e' => { try!(w.write(&[ch as u8])); }
[INFO] [stderr]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:63:32
[INFO] [stderr]    |
[INFO] [stderr] 63 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:81:21
[INFO] [stderr]    |
[INFO] [stderr] 81 |         f.write_str(error::Error::description(self))
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/parser.rs:93:62
[INFO] [stderr]    |
[INFO] [stderr] 93 |             _ => write!(f, "{}:{}: {}", self.line, self.col, error::Error::description(self))
[INFO] [stderr]    |                                                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/parser.rs:115:42
[INFO] [stderr]     |
[INFO] [stderr] 115 |             ErrorType::Unicode(ref e) => error::Error::description(e),
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/parser.rs:117:37
[INFO] [stderr]     |
[INFO] [stderr] 117 |             ErrorType::Io(ref e) => error::Error::description(e),
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:72:44
[INFO] [stderr]    |
[INFO] [stderr] 72 |             ErrorInner::Parser(ref e) => e.description(),
[INFO] [stderr]    |                                            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/sentinel.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     err.description().as_ptr() == SENTINEL_STR.as_ptr()
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/sentinel.rs:82:9
[INFO] [stderr]    |
[INFO] [stderr] 82 |     err.description().as_ptr() == SENTINEL_STR.as_ptr()
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 38 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.23s
[INFO] running `"docker" "inspect" "605a371a26ae4cf731079c93c5b4ed774717adbd10f2afba6028195bd69cb613"`
[INFO] running `"docker" "rm" "-f" "605a371a26ae4cf731079c93c5b4ed774717adbd10f2afba6028195bd69cb613"`
[INFO] [stdout] 605a371a26ae4cf731079c93c5b4ed774717adbd10f2afba6028195bd69cb613