Categorize the unwrap lints correctly.

clippy_lints/src/lib.rs

@@ -926,6 +926,7 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
         mutex_atomic::MUTEX_INTEGER,
         needless_borrow::NEEDLESS_BORROW,
         ranges::RANGE_PLUS_ONE,
+        unwrap::PANICKING_UNWRAP,
         unwrap::UNNECESSARY_UNWRAP,
     ]);
 }

clippy_lints/src/unwrap.rs

@@ -161,7 +161,7 @@ impl<'a, 'tcx: 'a> Visitor<'tcx> for UnwrappableVariablesVisitor<'a, 'tcx> {
                     } else {
                         span_lint_and_then(
                             self.cx,
-                            UNNECESSARY_UNWRAP,
+                            PANICKING_UNWRAP,
                             expr.span,
                             &format!("This call to `{}()` will always panic.",
                             method_name.name),
@@ -181,7 +181,7 @@ impl<'a, 'tcx: 'a> Visitor<'tcx> for UnwrappableVariablesVisitor<'a, 'tcx> {
 
 impl<'a> LintPass for Pass {
     fn get_lints(&self) -> LintArray {
-        lint_array!(UNNECESSARY_UNWRAP)
+        lint_array!(PANICKING_UNWRAP, UNNECESSARY_UNWRAP)
     }
 }
 

tests/ui/checked_unwrap.rs

@@ -1,4 +1,4 @@
-#![deny(unnecessary_unwrap)]
+#![deny(panicking_unwrap, unnecessary_unwrap)]
 #![allow(if_same_then_else)]
 
 fn main() {

tests/ui/checked_unwrap.stderr

@@ -7,10 +7,10 @@ error: You checked before that `unwrap()` cannot fail. Instead of checking and u
   |         ^^^^^^^^^^
   |
 note: lint level defined here
- --> $DIR/checked_unwrap.rs:1:9
+ --> $DIR/checked_unwrap.rs:1:27
   |
-1 | #![deny(unnecessary_unwrap)]
-  |         ^^^^^^^^^^^^^^^^^^
+1 | #![deny(panicking_unwrap, unnecessary_unwrap)]
+  |                           ^^^^^^^^^^^^^^^^^^
 
 error: This call to `unwrap()` will always panic.
  --> $DIR/checked_unwrap.rs:9:9
@@ -20,6 +20,12 @@ error: This call to `unwrap()` will always panic.
 ...
 9 |         x.unwrap(); // will panic
   |         ^^^^^^^^^^
+  |
+note: lint level defined here
+ --> $DIR/checked_unwrap.rs:1:9
+  |
+1 | #![deny(panicking_unwrap, unnecessary_unwrap)]
+  |         ^^^^^^^^^^^^^^^^
 
 error: This call to `unwrap()` will always panic.
   --> $DIR/checked_unwrap.rs:12:9