Forward reference errors with -g

[Jeremy]

C:\dmd\FreeUniverse>build FreeUniverse.d -clean -debug -g
error: forward reference of FT_Memory
error: forward reference of FT_Memory
error: forward reference of FT_Memory
error: forward reference of FT_Stream
error: forward reference of FT_Stream
error: forward reference of FT_Vector
error: forward reference of FT_Vector
error: forward reference of FT_Vector
error: forward reference of FT_Vector
error: forward reference of FT_Vector
error: forward reference of FT_Vector
error: forward reference of FT_Span
error: forward reference of FT_Raster
error: forward reference of FT_Raster
error: forward reference of FT_Raster
error: forward reference of FT_Raster
error: forward reference of FT_Raster_Params
error: forward reference of FT_Raster
error: forward reference of FT_Module
error: forward reference of FT_Glyph
error: forward reference of FT_Glyph
error: forward reference of FT_Matrix
error: forward reference of FT_Vector
error: forward reference of FT_Glyph
error: forward reference of FT_BBox
error: forward reference of FT_Renderer
error: forward reference of FT_GlyphSlot
error: forward reference of FT_BBox
error: forward reference of FTC_MruNode
error: forward reference of FT_Pointer
error: forward reference of FTC_Node
error: forward reference of FTC_Cache
error: forward reference of FTC_Cache
error: forward reference of FT_Incremental
error: forward reference of FT_Data
error: forward reference of FT_Face
error: forward reference of FT_Size
error: forward reference of FT_GlyphSlot
error: forward reference of FT_AutoHinter
error: forward reference of FT_Face
error: forward reference of FT_AutoHinter
error: forward reference of FT_Face
error: forward reference of FT_AutoHinter
error: forward reference of FT_CMap
error: forward reference of TT_Loader
error: forward reference of TT_Face
error: forward reference of PSH_Globals
error: forward reference of T1_Hints
error: forward reference of T1_Hints
error: forward reference of FT_UInt
error: forward reference of FT_Long
error: forward reference of T1_Hints
error: forward reference of FT_UInt
error: forward reference of T2_Hints
error: forward reference of T2_Hints
error: forward reference of FT_UInt
error: forward reference of FT_UInt
error: forward reference of FT_Fixed
error: forward reference of T2_Hints
error: forward reference of FT_UInt
error: forward reference of FT_UInt
error: forward reference of FT_Byte
error: forward reference of T2_Hints
error: forward reference of FT_UInt
error: forward reference of FT_Byte
error: forward reference of FT_UInt
error: forward reference of FT_Face
error: forward reference of FT_Pointer
error: forward reference of T1_Builder
error: forward reference of FT_Pos
error: forward reference of FT_Pos
error: forward reference of FT_Byte
error: forward reference of T1_Builder

I am using Derelict, ArcGames (with freetype) -- All these error messages go
away and it compiles fine without the '-g' option. Is this a bug, or can I just
not use '-g' in my program? I'd like to use this with windbg :)