Compiler bug in gdiplus.pas

[EganSolo]

Lazarus 2.0.12
FPC 3.2.0
SVN Revision: 64642.
Downloaded the zip file code.codebot-master
loaded the package codebot and hit compile.
Compilation error in gdiplus.pas, line 11906: Can't determine which overloaded function to call. Function in question is TGdiBitmap.create(size * 2, Size * 2)
This is really weird. I checked all the constructors you have in this class:

 {01} constructor Create(Bitmap : GpBitmap ); overload;
 {02} constructor Create(Filename : WideString; UseEmbeddedColorManagement: Boolean = False); overload;
 {03} constructor Create(Stream : IStream ; UseEmbeddedColorManagement: Boolean = False); overload;
 {04} constructor Create(Width, Height, Stride : Integer ; Format : TPixelFormat ;
 scan0 : PByte ); overload;
 {05} constructor Create(Width, Height : Integer ; Format: TPixelFormat = PixelFormat32bppArgb ); overload;
 {06} constructor Create(Width, Height : Integer ; Target : IGdiGraphics ); overload;
 {07} constructor Create(surface : IDirectDrawSurface7 ); overload;
 {08} constructor Create(var BitmapInfo : TBitmapInfo; BitmapData : Pointer ); overload;
 {09} constructor Create(Bmp : HBitmap ; Pal : HPALETTE ); overload;
 {10} constructor Create(Icon : HICON ); overload;
 {11} constructor Create(hInstance : HMODULE ; BitmapName : WideString ); overload;

It seems to me that the call at line 11906 is calling constructor number 5 which has a signature that is different from the signatures of the other constructors. Further, the superclass TGDImage does not have a constructor that could clash with constructor number 5. The same holds true for TInterfacedObjet and TObject.

Could that be a bug in the compiler?

[EganSolo]

I'm on Win64 and the compiler is getting confused between declarations 5 and 9 because you're making a call that's passing 2 * Size, and that could be interpreted as a Qword if 2 * size overflows the integer bounds.

Solution: If you're certain that 2 * Size will always be less than MaxInt, then either typecast 2 * Size to integer when passing it or assign it to an integer variable before making the call.