On Monday, 6 May 2019 at 18:21:28 UTC, Jacob Carlborg wrote: > On 2019-05-06 15:43, Aldo wrote: >> Hello, >> >> is there a difference between __gshared on 32 and 64 bit apps ? > > Shouldn't be. Yeah, maybe you're running into issues with the antique DigitalMars runtime? It has well-known issues with concurrency. Try LDC or the COFF output (-m32mscoff).