Title: 
Component: Phobos
Severity: 
Code number: 
Keywords: 
Outcome: 
Is done: no


I don't know what's happening here:


import std.stdio, std.algorithm;
void main() {
    auto s1 = "hello";
    auto m1 = map!(c => c)(s1);
    writeln(m1);
}


DMD 2.058head gives:

...\dmd2\src\phobos\std\range.d(295): Error: static assert  "Cannot put a Result into a LockingTextWriter"
...\dmd2\src\phobos\std\format.d(1509):        instantiated from here: put!(LockingTextWriter,Result)
...\dmd2\src\phobos\std\format.d(1984):        instantiated from here: formatRange!(LockingTextWriter,Result,char)
...\dmd2\src\phobos\std\format.d(2228):        instantiated from here: formatValue!(LockingTextWriter,Result,char)
...\dmd2\src\phobos\std\format.d(319):        ... (2 instantiations, -v to show) ...
...\dmd2\src\phobos\std\stdio.d(1563):        instantiated from here: write!(Result,char)
test2.d(5):        instantiated from here: writeln!(Result)


Note that array(m1) works.