LC0087 - StefanMaron/BusinessCentral.LinterCop GitHub Wiki
Use IsNullGuid() to check for empty GUID values.
This rule ensures that GUID comparisons are performed safely by enforcing the use of the IsNullGuid() method instead of direct comparisons. Directly comparing a GUID to an empty string ('') will cause a runtime error because '' is not a valid GUID format.
When a GUID is compared to a string-like type, the string is parsed into a GUID behind the scenes. If the string cannot be parsed into a valid GUID, a runtime exception is thrown.
Example
procedure MyProcedure()
var
MyGuid: Guid;
begin
if MyGuid = '' then; // Use 'IsNullGuid(MyGuid)' method instead of comparing the Guid 'MyGuid' with '', as this will result in a runtime error.
end;
procedure MyProcedure()
var
MyGuid: Guid;
begin
if IsNullGuid(MyGuid) then;
end;