---
import std.stdio;

void main() {
//  for (auto bc = File.ByChunk(File(""), 1); ; ) { } // as expected
//  for (auto bc = File("").byChunk(1);  false; ) { } // as expected
    for (auto bc = File("").byChunk(1); ; ) { } // infinite loop
    foreach(line; File("").byLine()) { }        // infinite loop too
}
---
It writes this in infinite loop:

Bypasses std.exception.ErrnoException@std\stdio.d(288)
=== Bypassed ===
std.exception.ErrnoException@std\stdio.d(288): Cannot open file `' in mode `rb' (No error)


Not sure is it dmd or druntime issue.