[Issue 15293] File().byLine().map!toUpper throws UnicodeException@src\rt\util\utf.d(290): invalid UTF-8 sequence on pure ASCII file

Thu, 05 Nov 2015 14:57:57 -0800 

https://issues.dlang.org/show_bug.cgi?id=15293

[email protected] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[email protected]
           Severity|normal                      |regression

--- Comment #2 from [email protected] ---
A first reduction:
----
static import std.file;
import std.stdio: File;
import std.string: toUpper;

void main()
{
    std.file.write("gentest.txt", "aaaaaaaa\naaaaaaa\n00000000a");
    foreach(ln; File("gentest.txt").byLine())
    {
        toUpper(ln);
    }
}
----

Works with 2.068.2.

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