_D11CLGLInterop2CQC6opencl12commandqueue14CLCommandQueue gets demangled as CLGLInterop.CQopencl.commandqueue.CLCommandQueue Don't know what the correct output is (to make clear CQ is a variable), but there should at least be a space in between.
https://github.com/D-Programming-Language/druntime/commit/a59dd374bf3b0d98d7e59eb47ffb0488bf9b16d9