[Issue 23586] New: DMD forgets a variable was just declared.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23586

          Issue ID: 23586
           Summary: DMD forgets a variable was just declared.
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: major
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: deadalnix at gmail.com

Sample code:

int foo(int x) {
    switch(x) {
        case 0:
            goto Bar;

        Bar:
        default:
            auto y = 6;
            return y;
    }
}

void main() {
    auto x = foo(0);
}

What I get:
Error: undefined identifier `y`

What I expect:
The compiler to remember the variable was declared the line immediately above
and use that.

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