Issue when building example

[hanckmann]

rocket_redis_r2d2/ (master) $ cargo build Downloading r2d2 v0.7.4
Downloading r2d2_redis v0.6.0
Downloading rocket v0.3.3
Downloading rocket_codegen v0.3.3
Downloading scheduled-thread-pool v0.1.0
Downloading url v1.5.1
Downloading percent-encoding v1.0.0
Downloading isatty v0.1.5
Downloading libc v0.2.32
Downloading serde v1.0.16
Downloading byteorder v1.1.0
Downloading rayon-core v1.2.1
Downloading lazy_static v0.2.9
Downloading futures v0.1.16
Downloading rand v0.3.17
Downloading either v1.3.0
Compiling state v0.3.2
Compiling version_check v0.1.3
Compiling pear v0.0.10
Compiling rayon-core v1.2.1
Compiling percent-encoding v1.0.0
Compiling redis v0.8.0
Compiling sha1 v0.2.0
Compiling matches v0.1.6
Compiling pear_codegen v0.0.10
Compiling antidote v1.0.0
Compiling futures v0.1.16
Compiling smallvec v0.4.4
Compiling log v0.3.8
Compiling unicode-normalization v0.1.5
Compiling ordermap v0.2.13
Compiling gcc v0.3.54
Compiling traitobject v0.1.0
Compiling language-tags v0.2.2
Compiling lazy_static v0.2.9
Compiling scopeguard v0.3.3
Compiling either v1.3.0
Compiling serde v1.0.16
Compiling byteorder v1.1.0
Compiling untrusted v0.5.1
Compiling httparse v1.2.3
Compiling safemem v0.2.0
Compiling libc v0.2.32
Compiling yansi v0.3.4
Compiling typeable v0.1.2
Compiling unicase v1.4.2
Compiling unicode-bidi v0.3.4
Compiling scheduled-thread-pool v0.1.0
Compiling mime v0.2.6
Compiling coco v0.1.1
Compiling base64 v0.6.0
Compiling rocket_codegen v0.3.3
Compiling rocket v0.3.3
Compiling isatty v0.1.5
Compiling num_cpus v1.7.0
Compiling rand v0.3.17
Compiling time v0.1.38
Compiling memchr v1.0.2
Compiling r2d2 v0.7.4
Compiling idna v0.1.4
Compiling url v1.5.1
Compiling rayon v0.7.1
Compiling toml v0.4.5
Compiling hyper v0.10.13
Compiling ring v0.11.0
Compiling r2d2_redis v0.6.0
Compiling cookie v0.9.2
error[E0560]: struct syntax_ext::deriving::generic::ty::Path<'_> has no field named global
--> /home/hanckmannp/.cargo/registry/src/github.com-1ecc6299db9ec823/rocket_codegen-0.3.3/src/decorators/derive_form.rs:76:13
|
76 | global: true,
| ^^^^^^^ syntax_ext::deriving::generic::ty::Path<'_> does not have this field

error[E0560]: struct syntax_ext::deriving::generic::ty::Path<'_> has no field named global
--> /home/hanckmannp/.cargo/registry/src/github.com-1ecc6299db9ec823/rocket_codegen-0.3.3/src/decorators/derive_form.rs:91:29
|
91 | global: true
| ^^^^^^^ syntax_ext::deriving::generic::ty::Path<'_> does not have this field

error[E0560]: struct syntax_ext::deriving::generic::ty::Path<'_> has no field named global
--> /home/hanckmannp/.cargo/registry/src/github.com-1ecc6299db9ec823/rocket_codegen-0.3.3/src/decorators/derive_form.rs:99:25
|
99 | global: false,
| ^^^^^^^ syntax_ext::deriving::generic::ty::Path<'_> does not have this field

error[E0560]: struct syntax_ext::deriving::generic::ty::Path<'_> has no field named global
--> /home/hanckmannp/.cargo/registry/src/github.com-1ecc6299db9ec823/rocket_codegen-0.3.3/src/decorators/derive_form.rs:109:21
|
109 | global: true,
| ^^^^^^^ syntax_ext::deriving::generic::ty::Path<'_> does not have this field

error: aborting due to 4 previous errors

error: Could not compile rocket_codegen.

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