scala> @nowarn("v") def f = try 1
1 warning found
-- [E002] Syntax Warning: ------------------------------------------------------
1 |@nowarn("v") def f = try 1
 | ^^^^^
 | A try without catch or finally is equivalent to putting
 | its body in a block; no exceptions are handled.
 |Matching filters for @nowarn or -Wconf:
 | - id=E2
 | - name=EmptyCatchAndFinallyBlock
 |
 | longer explanation available when compiling with `-explain`

scala> def f: Int = ""
-- [E007] Type Mismatch Error: -------------------------------------------------
1 |def f: Int = ""
 | ^^
 | Found: ("" : String)
 | Required: Int
 |
 | longer explanation available when compiling with `-explain`
1 error found
scala> @annotation.nowarn("v") def f: Int = ""
-- [E007] Type Mismatch Error: -------------------------------------------------
1 |@annotation.nowarn("v") def f: Int = ""
 | ^^
 | Found: ("" : String)
 | Required: Int
 |-----------------------------------------------------------------------------
 | Explanation (enabled by `-explain`)
 |- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 |
 | Tree: ""
 | I tried to show that
 | ("" : String)
 | conforms to
 | Int
 | but none of the attempts shown below succeeded:
 |
 | ==> ("" : String) <: Int
 | ==> String <: Int = false
 |
 | The tests were made under the empty constraint
 -----------------------------------------------------------------------------
1 error found