[Issue 13575] New: Unreachable scope(failure) should be warned

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13575

          Issue ID: 13575
           Summary: Unreachable scope(failure) should be warned
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: diagnostic
          Severity: enhancement
          Priority: P1
         Component: DMD
          Assignee: nobody at puremagic.com
          Reporter: k.hara.pg at gmail.com

>From issue 11574:

import std.stdio;

void someFunc()
{
     scope(failure) { writeln("What?");} // <-- never executed.
     scope(failure) {
         writeln("Failed in someFunc()");
         return;
     }
     throw new Exception("Exception!");
}

void main() {
     try {
         someFunc();
         writeln("Yay, someFunc() is nothrow");
     } catch(Exception e) {
         writeln("An exception in main!");
     }
}

In someFunc, the first scope(failure) is never executed. There's no bug, but I
think, if -w specified, dmd should warn the code as that it is not reachable.

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