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

On 07/05/2016 12:47 PM, Jack Applegame wrote:
> 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:
[...]

There sure is at least one bug. I guess this has to do with recent changes to symbol lookup/visibility rules.

On the line from the error message there are fully qualified references to std.uni.toLower, but std.uni isn't imported as a module. This can easily be fixed in phobos. I've filed an issue:
https://issues.dlang.org/show_bug.cgi?id=16238

Something is also going wrong in dmd. There should be a deprecation message.

On Tuesday, 5 July 2016 at 13:48:50 UTC, ag0aep6g wrote:
> Something is also going wrong in dmd. There should be a deprecation message.
Exactly.