[sv-bc] query related with `timescale

Hi,

Should `timescale be consider as timeunit and timeprecision declaration.??

Should following testcase pass

`timescale 1ns/1ns

timeunit 10ps;
timeprecision 1fs;

module tmp();
endmodule

According to LRM 19.10
"The timeunit and timeprecision declarations can be repeated as later 
items, but must
  match the previous declaration within the current time scope."

As some tool is showing error while some passing the above testcase.

Thanks,
Dhiraj



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