2241 – DMD abort

DMD aborts with this:
---- cut here ----
% cat dmdabort.d
import std.file;
string find_file(string directory)
{
 char[] result;
 foreach (string path; dirEntries(directory, SpanMode.shallow)) {
 string fullpath = std.file.join(directory, path);
 // ...
 }
 return cast(string)result;
}
void main(string[] args)
{
 // writefln("%s", find_file("."));
}
% dmd dmdabort.d
dmd: expression.c:5222: virtual Expression* DotIdExp::semantic(Scope*): Assertion `0' failed.
zsh: abort dmd dmdabort.d
%
---- cut here ----
Comment out the "string fullpath =" line and it compiles.
DMD 2.017 on Linux.

Fixed dmd 1.035 and 2.019