As you may know from the past I had published solutions to these DataAndTime>>primitiveSystemOffset error.
Due to the fact, that this might be changed in the 8.5.2 release – but I have daylight-saving-time setting now – I changed MSKPlatformExtension to include corrected methods for Windows and Linux. With 1.24 or MSKPlatformExtension this patch is included – for both operating systems in different supapplication (to make headless packaging possible – without warnings).
To make this patch active, you have to patch your Kernel application (where DateAndTime is defined):
Copy #primitiveSystemOffset method to #primitivePrimitiveSystemOffset (which is therefore a copy of the original one):
primitiveSystemOffset "Answer an representing the westward displacement of system local time from UTC in seconds. The value can be betwen 0 and 86400 minutes." | aClass | ^(aClass := Smalltalk at: #MSKOperatingServices ifAbsent:[ nil ]) isNil ifTrue:[ self primitivePrimitiveSystemOffset ] ifFalse:[ aClass MSKPrimitiveSystemOffset ]
Then you should get a corrected offset, if application MSKPlatformExtension has been loaded – otherwise you get the product (wrong) behaviour.
By the way: one could produce a patch for this problem by using ICU – delivering a solution for all supported platform. A platform independent solutions for the original primitiveSystemOffset could also be (using ICU):
^(0 - MSKLocale current offsetFromUTC asSeconds)
Which patch is a more suitable one ? The first one is a more product oriented one – just patching the error, the ICU oriented one is one I have used in my 8.5.0 Kernel – because I simply added ICU very near to the Kernel – more or less on the same level. Because UTF8, timezones and all that stuff is pretty low level and affects lots of other subsystems also.