Bug 20858 – std.parallelism.task: Can't move value to task param

src\phobos\std\parallelism.d(444,29): Error: struct jin.go.Output!long.Output is not copyable because it is annotated with @disable src\phobos\std\parallelism.d(832,16): Error: template instance std.parallelism.Task!(wrapper, void function(Output!long) @system, Output!long) error instantiating Problem in this phobos code: private static void impl(void* myTask) { import std.algorithm.internal : addressOf; Task* myCastedTask = cast(typeof(this)*) myTask; static if (is(ReturnType == void)) { fun(myCastedTask._args); // !!! } else static if (is(typeof(&(fun(myCastedTask._args))))) { myCastedTask.returnVal = addressOf(fun(myCastedTask._args)); } else { myCastedTask.returnVal = fun(myCastedTask._args); } } See workaround in VibeD to call function with move semantic: https://github.com/vibe-d/vibe-core/blob/master/source/vibe/core/taskpool.d#L210 mixin(callWithMove!ARGS("c", "args.expand")); // !!! package string callWithMove(ARGS...)(string func, string args) { import std.string; string ret = func ~ "("; foreach (i, T; ARGS) { if (i > 0) ret ~= ", "; ret ~= format("%s[%s]", args, i); static if (needsMove!T) ret ~= ".move"; } return ret ~ ");"; }

Can you show the client code that triggers the compilation errors you showed?

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