void main() {
	switch (0) {
		mixin ("case 0: break;");
		default: assert (0);
	}
}

The above code fails to compile with repeated "found 'EOF' instead of statement" errors on the line of the mixin, as does the following:

void main() {
	switch (0) {
		mixin ("default: break;");
	}
}

Were they not mixins, the code would compile and run fine.

Mixing in ordinary labelled statements works:

void main() {
	goto x;
	assert (0);
	mixin("x:;");
}

Workarounds:

Mixing in the entire switch statement:

void main() {
	mixin("switch (0) {"
		"case 0: break;"
		"default: assert (0);"
	"}");
}

Or just the block statement inside the switch:

void main() {
	switch (0) mixin("{"
		"case 0: break;"
		"default: assert (0);"
	"}");
}