https://issues.dlang.org/show_bug.cgi?id=16011
Walter Bright <bugzi...@digitalmars.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |bugzi...@digitalmars.com --- Comment #3 from Walter Bright <bugzi...@digitalmars.com> --- Compiling this now gives the following error: core.exception.AssertError@dstruct.d(380): Assertion failure ---------------- 0x005FD23F in _d_assertp 0x00408EFA in AttribDeclaration at C:\cbx\mars\attrib.d(181) 0x0045F5D7 in StructDeclaration at C:\cbx\mars\dstruct.d(373) 0x0045F5D7 in StructDeclaration at C:\cbx\mars\dstruct.d(373) 0x00474D79 in TemplateInstance at C:\cbx\mars\dtemplate.d(8272) 0x00474DDC in TemplateInstance at C:\cbx\mars\dtemplate.d(8290) 0x00470E61 in TemplateInstance at C:\cbx\mars\dtemplate.d(6361) 0x004714BB in TemplateInstance at C:\cbx\mars\dtemplate.d(6595) 0x004ECA1E in TypeInstance at C:\cbx\mars\mtype.d(8004) 0x004ECAE2 in TypeInstance at C:\cbx\mars\mtype.d(8027) 0x00434BE8 in VarDeclaration at C:\cbx\mars\declaration.d(1180) 0x0045F5D7 in StructDeclaration at C:\cbx\mars\dstruct.d(373) 0x00454D54 in Module at C:\cbx\mars\dmodule.d(1065) 0x004D9F9F in int ddmd.mars.tryMain(uint, const(char)**) at C:\cbx\mars\mars.d(847) 0x004DAB43 in _Dmain at C:\cbx\mars\mars.d(1086) 0x005FF73B in D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFNlZv 0x005FF6FF in scope void rt.dmain2._d_run_main(int, char**, extern (C) int function(char[][])*).runAll() 0x005FF600 in _d_run_main 0x004DCDD8 in main at C:\cbx\mars\root\stringtable.d(7) 0x0061B245 in mainCRTStartup 0x74F3336A in BaseThreadInitThunk 0x77359902 in RtlInitializeExceptionChain 0x773598D5 in RtlInitializeExceptionChain It appears to be a forward reference error. The code itself cannot work because RefCounted stores an instance of S in itself, and a struct cannot have itself as a field. In fact, the same error occurs with the following example: struct RefCounted { S s; } struct S { int x; RefCounted s; } --