[Issue 23873] New: [ICE] segfault on imported `static if ; else auto x`

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23873

          Issue ID: 23873
           Summary: [ICE] segfault on imported `static if ; else auto x`
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: d.bugs at webfreak.org

foo.d
```
struct Foo
{
    import bar;
}
```

bar.d
```
static if ;
    else auto x
```

interesting note: if `Foo` is a function and not an aggregate type, this
doesn't ICE.

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