Merge #14

14: Handling errors from closure in function `with_exported` r=posborne a=Andful

This change makes sure that `with_exported` handles both possible errors from `closure()` and `self.unexport()`

Co-authored-by: Andrea Nardi <buongiorno19972@gmail.com>

Author: bors[bot]

src/lib.rs

@@ -141,7 +141,14 @@ impl Pwm {
     {
         self.export()?;
         match closure() {
-            Ok(()) | Err(_) => self.unexport(),
+            Ok(()) => self.unexport(),
+            Err(e) => match self.unexport() {
+                Ok(()) => Err(e),
+                Err(ue) => Err(error::Error::Unexpected(format!(
+                    "Failed unexporting due to:\n{}\nwhile handling:\n{}",
+                    ue, e
+                ))),
+            },
         }
     }