Rollup merge of #33474 - frewsxcv:unwrap-err, r=alexcrichton

Utilize `Result::unwrap_err` in more places.

None

src/test/run-make/static-unwinding/main.rs

@@ -25,7 +25,7 @@ fn main() {
     thread::spawn(move|| {
         let _a = A;
         lib::callback(|| panic!());
-    }).join().err().unwrap();
+    }).join().unwrap_err();
 
     unsafe {
         assert_eq!(lib::statik, 1);

src/test/run-pass/command-before-exec.rs

@@ -62,7 +62,7 @@ fn main() {
 
     let output = Command::new(&me).arg("bad").before_exec(|| {
         Err(Error::from_raw_os_error(102))
-    }).output().err().unwrap();
+    }).output().unwrap_err();
     assert_eq!(output.raw_os_error(), Some(102));
 
     let pid = unsafe { libc::getpid() };

src/test/run-pass/no-landing-pads.rs

@@ -27,6 +27,6 @@ fn main() {
     thread::spawn(move|| -> () {
         let _a = A;
         panic!();
-    }).join().err().unwrap();
+    }).join().unwrap_err();
     assert!(unsafe { !HIT });
 }

src/test/run-pass/panic-recover-propagate.rs

@@ -28,10 +28,10 @@ fn main() {
             panic!("hi there");
         });
 
-        panic::propagate(result.err().unwrap());
+        panic::propagate(result.unwrap_err());
     }).join();
 
-    let msg = *result.err().unwrap().downcast::<&'static str>().unwrap();
+    let msg = *result.unwrap_err().downcast::<&'static str>().unwrap();
     assert_eq!("hi there", msg);
     assert_eq!(1, A.load(Ordering::SeqCst));
 }

src/test/run-pass/sepcomp-unwind.rs

@@ -39,5 +39,5 @@ mod b {
 }
 
 fn main() {
-    thread::spawn(move|| { ::b::g() }).join().err().unwrap();
+    thread::spawn(move|| { ::b::g() }).join().unwrap_err();
 }

src/test/run-pass/terminate-in-initializer.rs

@@ -24,13 +24,13 @@ fn test_ret() { let _x: Box<isize> = return; }
 
 fn test_panic() {
     fn f() { let _x: Box<isize> = panic!(); }
-    thread::spawn(move|| f() ).join().err().unwrap();
+    thread::spawn(move|| f() ).join().unwrap_err();
 }
 
 fn test_panic_indirect() {
     fn f() -> ! { panic!(); }
     fn g() { let _x: Box<isize> = f(); }
-    thread::spawn(move|| g() ).join().err().unwrap();
+    thread::spawn(move|| g() ).join().unwrap_err();
 }
 
 pub fn main() {

src/test/run-pass/unit-like-struct-drop-run.rs

@@ -30,6 +30,6 @@ pub fn main() {
         let _b = Foo;
     }).join();
 
-    let s = x.err().unwrap().downcast::<&'static str>().unwrap();
+    let s = x.unwrap_err().downcast::<&'static str>().unwrap();
     assert_eq!(&**s, "This panic should happen.");
 }