Possible bug

[Jack Applegame via Digitalmars-d-learn]

ttt.d
> import std.string;
> 
> void main() {
>     lastIndexOf("aa","bb");
> }

rdmd ttt.d
compiles successfully without any errors or warnings


rdmd -dw ttt.d
compiles successfully without any errors or warnings

rdmd -de ttt.d
> /usr/include/dmd/phobos/std/string.d(1239): Error: template 
> std.algorithm.searching.endsWith cannot deduce function from 
> argument types !((a, b) => std.uni.toLower(a) == 
> std.uni.toLower(b))(const(char)[], const(char)[]), candidates 
> are:
>/usr/include/dmd/phobos/std/algorithm/searching.d(981): 
>std.algorithm.searching.endsWith(alias pred = "a == b", Range, 
>Needles...)(Range doesThisEnd, Needles withOneOfThese) if 
>(isBidirectionalRange!Range && Needles.length > 1 && 
>is(typeof(.endsWith!pred(doesThisEnd, withOneOfThese[0])) : 
>bool) && is(typeof(.endsWith!pred(doesThisEnd, 
>withOneOfThese[1..__dollar])) : uint))
> /usr/include/dmd/phobos/std/algorithm/searching.d(1048): 
> std.algorithm.searching.endsWith(alias pred = "a == b", R1, 
> R2)(R1 doesThisEnd, R2 withThis) if (isBidirectionalRange!R1 && 
> isBidirectionalRange!R2 && 
> is(typeof(binaryFun!pred(doesThisEnd.back, withThis.back)) : 
> bool))
> /usr/include/dmd/phobos/std/algorithm/searching.d(1076): 
> std.algorithm.searching.endsWith(alias pred = "a == b", R, E)(R 
> doesThisEnd, E withThis) if (isBidirectionalRange!R && 
> is(typeof(binaryFun!pred(doesThisEnd.back, withThis)) : bool))
> /usr/include/dmd/phobos/std/algorithm/searching.d(1086): 
> std.algorithm.searching.endsWith(alias pred, R)(R doesThisEnd) 
> if (isInputRange!R && ifTestable!(typeof(doesThisEnd.front), 
> unaryFun!pred))
> ttt.d(4): Error: template instance 
> std.string.lastIndexOf!(char, char) error instantiating