ICE : SegFault on CTFE opDispatch Constraints

[dcousens]

The following code

import std.algorithm : all, canFind;

struct Foo {
    float a, b, c;

    auto opDispatch(string swiz)() if (swiz.all!(x => "abc".canFind(x))) {
        return mixin("Foo(" ~ swiz[0] ~ "," ~ swiz[1] ~ "," ~ swiz[2] ~ ")");
    }
}

auto f(Foo f) {
    return f.cab;
}

Makes the following mess

0  ldc2            0x0000000001300fb2 llvm::sys::PrintStackTrace(_IO_FILE*) + 34
1  ldc2            0x0000000001300e19
2  libpthread.so.0 0x00007f66485ed870
3  ldc2            0x00000000006c7700 X86_64TargetABI::returnInArg(TypeFunction*) + 16
4  ldc2            0x00000000006bf64a DtoFunctionType(Type*, Type*, Type*, bool) + 4058
5  ldc2            0x00000000006c0bdd DtoDeclareFunction(FuncDeclaration*) + 621
6  ldc2            0x00000000006ca138
7  ldc2            0x00000000006ca1f1
8  ldc2            0x00000000006cb0e5 DtoCreateNestedContext(FuncDeclaration*) + 69
9  ldc2            0x00000000006c2708 DtoDefineFunction(FuncDeclaration*) + 1544
10 ldc2            0x000000000071c109 Ir::emitFunctionBodies() + 41
11 ldc2            0x00000000006d049d Module::genLLVMModule(llvm::LLVMContext&, Ir*) + 685
12 ldc2            0x00000000005cc9d0 main + 6960
13 libc.so.6       0x00007f6647833bc5 __libc_start_main + 245
14 ldc2            0x00000000005ea9f5
Error: Could not execute /usr/bin/ldc2: Segmentation fault (core dumped)