mORMot Open Source

dcoun

Member

From: Crete, Greece

Registered: 2020-02-18

Posts: 474

variable that is nil is used and cause exception

mormot.core.collections, line 902

if fDynArray.Info.ArrayRtti is nil then fDynArray.Info.ArrayRtti.Kind will cause exception
I have random errors from that

constructor TIListParent.CreateRtti(aDynArray: TRttiCustom;
  aItemTypeInfo: PRttiInfo; aOptions: TListOptions; aSortAs: TRttiParserType);
begin
  fDynArray.InitRtti(aDynArray, fValue, @fCount);
  aSortAs := fDynArray.SetParserType(aSortAs, // aSortAs=ptNone->RTTI
    loCaseInsensitive in fOptions);
  if (fDynArray.Info.ArrayRtti = nil) or
     (fDynArray.Info.ArrayRtti.Kind <> aItemTypeInfo^.Kind)  then
    EIList.RaiseUtf8('%.Create<%> (%) does not match % (%)',
      [self, aItemTypeInfo^.RawName, ToText(aItemTypeInfo^.Kind)^,
       aDynArray.Info^.RawName, ToText(fDynArray.Info.ArrayRtti.Kind)^]);

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 15,259

Website

Re: variable that is nil is used and cause exception

Which compiler?
Which array type?

I guess there is not enough RTTI for this.

dcoun

Member

From: Crete, Greece

Registered: 2020-02-18

Posts: 474

Re: variable that is nil is used and cause exception

@ab, Delphi 11.3 in a Torm class
but:
if (fDynArray.Info.ArrayRtti = nil) or
     (fDynArray.Info.ArrayRtti.Kind <> aItemTypeInfo^.Kind)  then
    EIList.RaiseUtf8('%.Create<%> (%) does not match % (%)',
      [self, aItemTypeInfo^.RawName, ToText(aItemTypeInfo^.Kind)^,
       aDynArray.Info^.RawName, ToText(fDynArray.Info.ArrayRtti.Kind)^]);

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 15,259

Website

Re: variable that is nil is used and cause exception

I still don't understand how you defined the IList instance.