[Issue 15558] New: std.parallelism giving inscrutable error messages

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15558

          Issue ID: 15558
           Summary: std.parallelism giving inscrutable error messages
           Product: D
           Version: D2
          Hardware: x86
                OS: Mac OS X
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: deadalnix at gmail.com

struct Host {
    @disable this(this);
}

void main() {
    uint[] arr;

    import std.parallelism;
    auto hostmap = taskPool.map!(function Host(uint a) {
        return Host.init;
    })(arr);
}


Gives me:

/Library/D/dmd/src/phobos/std/parallelism.d(1677): Error: cannot interpret
(uint[], ulong, Host[]) at compile time
/Library/D/dmd/src/phobos/std/parallelism.d(1677): Error: static assert 
__error
/Library/D/dmd/src/phobos/std/parallelism.d(1996):        instantiated from
here: amap!(uint[], ulong, Host[])
fail.d(11):        instantiated from here: map!(uint[])

Turns out the @disable this(this); is key in triggering the error.

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