[Issue 11249] New: MapResult failed semantic analysis

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=11249

           Summary: MapResult failed semantic analysis
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: regression
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: deadalnix at gmail.com


--- Comment #0 from deadalnix <deadalnix at gmail.com> 2013-10-13 22:23:55 PDT ---
$ cat fail.d
module fail;

import std.algorithm;
class A {
    A[] as;
}

class B {
    A[] as;
}

A visit(A a) {
    a.as.map!(a => visit);
    return null;
}

A visit(B b) {
    b.as.map!(a => visit);
    return null;
}

A visit() {
    return null;
}

$ ../dmd/src/dmd -c -offail.o fail.d
../dmd/src/../../phobos/std/algorithm.d(415): Error: struct
fail.visit.MapResult!(__lambda2, A[]).MapResult failed semantic analysis
../dmd/src/../../phobos/std/algorithm.d(425): Error: this for _input needs to
be type MapResult not type MapResult!(__lambda2, A[])
../dmd/src/../../phobos/std/algorithm.d(430): Error: this for _input needs to
be type MapResult not type MapResult!(__lambda2, A[])
../dmd/src/../../phobos/std/algorithm.d(436): Error: this for _input needs to
be type MapResult not type MapResult!(__lambda2, A[])
../dmd/src/../../phobos/std/algorithm.d(448): Error: this for _input needs to
be type MapResult not type MapResult!(__lambda2, A[])
../dmd/src/../../phobos/std/algorithm.d(454): Error: this for _input needs to
be type MapResult not type MapResult!(__lambda2, A[])
../dmd/src/../../phobos/std/algorithm.d(459): Error: this for _input needs to
be type MapResult not type MapResult!(__lambda2, A[])
../dmd/src/../../phobos/std/algorithm.d(471): Error: this for _input needs to
be type MapResult not type MapResult!(__lambda2, A[])
../dmd/src/../../phobos/std/algorithm.d(479): Error: this for _input needs to
be type MapResult not type MapResult!(__lambda2, A[])
../dmd/src/../../phobos/std/algorithm.d(496): Error: this for _input needs to
be type MapResult not type MapResult!(__lambda2, A[])
../dmd/src/../../phobos/std/algorithm.d(411): Error: template instance
fail.visit.MapResult!(__lambda2, A[]) error instantiating
fail.d(18):        instantiated from here: map!(A[])
fail.d(18): Error: template instance fail.visit.map!((a) => visit).map!(A[])
error instantiating

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