Fix compiler warnings (requires rustc 1.36.0).

.travis.yml

@@ -72,7 +72,7 @@ matrix:
 
     # MSRV
     - env: TARGET=x86_64-unknown-linux-gnu
-      rust: 1.34.0
+      rust: 1.36.0
       if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
 
 before_install:

README.md

@@ -175,7 +175,7 @@ to be considered reliable.
 
 ## Minimum Supported Rust Version (MSRV)
 
-This crate is guaranteed to compile on stable Rust 1.34.0 and up. It *might*
+This crate is guaranteed to compile on stable Rust 1.36.0 and up. It *might*
 compile with older versions but that may change in any new patch release.
 
 ## License

src/lib.rs

@@ -193,7 +193,7 @@ impl Chip {
     /// Open the GPIO Chip at the provided path (e.g. `/dev/gpiochip<N>`)
     pub fn new<P: AsRef<Path>>(path: P) -> Result<Chip> {
         let f = File::open(path.as_ref())?;
-        let mut info: ffi::gpiochip_info = unsafe { mem::uninitialized() };
+        let mut info: ffi::gpiochip_info = unsafe { mem::MaybeUninit::uninit().assume_init() };
         ffi::gpio_get_chipinfo_ioctl(f.as_raw_fd(), &mut info)?;
 
         Ok(Chip {
@@ -328,12 +328,12 @@ pub struct LineInfo {
     consumer: Option<String>,
 }
 
-/// Line Request Flags
-///
-/// Maps to kernel [`GPIOHANDLE_REQUEST_*`] flags.
-///
-/// [`GPIOHANDLE_REQUEST_*`]: https://elixir.bootlin.com/linux/v4.9.127/source/include/uapi/linux/gpio.h#L58
 bitflags! {
+    /// Line Request Flags
+    ///
+    /// Maps to kernel [`GPIOHANDLE_REQUEST_*`] flags.
+    ///
+    /// [`GPIOHANDLE_REQUEST_*`]: https://elixir.bootlin.com/linux/v4.9.127/source/include/uapi/linux/gpio.h#L58
     pub struct LineRequestFlags: u32 {
         const INPUT = (1 << 0);
         const OUTPUT = (1 << 1);
@@ -343,25 +343,25 @@ bitflags! {
     }
 }
 
-/// Event request flags
-///
-/// Maps to kernel [`GPIOEVENT_REQEST_*`] flags.
-///
-/// [`GPIOEVENT_REQUEST_*`]: https://elixir.bootlin.com/linux/v4.9.127/source/include/uapi/linux/gpio.h#L109
 bitflags! {
+    /// Event request flags
+    ///
+    /// Maps to kernel [`GPIOEVENT_REQEST_*`] flags.
+    ///
+    /// [`GPIOEVENT_REQUEST_*`]: https://elixir.bootlin.com/linux/v4.9.127/source/include/uapi/linux/gpio.h#L109
     pub struct EventRequestFlags: u32 {
         const RISING_EDGE = (1 << 0);
         const FALLING_EDGE = (1 << 1);
         const BOTH_EDGES = Self::RISING_EDGE.bits | Self::FALLING_EDGE.bits;
     }
 }
 
-/// Informational Flags
-///
-/// Maps to kernel [`GPIOLINE_FLAG_*`] flags.
-///
-/// [`GPIOLINE_FLAG_*`]: https://elixir.bootlin.com/linux/v4.9.127/source/include/uapi/linux/gpio.h#L29
 bitflags! {
+    /// Informational Flags
+    ///
+    /// Maps to kernel [`GPIOLINE_FLAG_*`] flags.
+    ///
+    /// [`GPIOLINE_FLAG_*`]: https://elixir.bootlin.com/linux/v4.9.127/source/include/uapi/linux/gpio.h#L29
     pub struct LineFlags: u32 {
         const KERNEL = (1 << 0);
         const IS_OUT = (1 << 1);