[Lazarus] Bug in FPC 3.0 discovered

LacaK lacak at zoznam.sk
Fri Mar 11 13:57:02 CET 2016

this is notification for users, who plan upgrade to latest Lazarus 1.6 
with FPC 3.0 from older versions which came with FPC 2.6.x

There was discovered bug in FPC 3.0 (already fixed in trunk) when 
currency and double data types are involved in mathematical operations 
like addition or multiplication.
Bug can be reproduced using simple example:

  c: currency;
  d: double;
   writeln(c*d);  // wrong result 123450000 instead of 12345

Bug does not affects all platforms . For example Win32, Linux64 are not 
affected. But Win64 IS affected.

This bug can cause unpredictable misbehavior.
For example in database applications using fcl-db/sqlDB and NUMERIC or 
DECIMAL data types as described in bug report #29760


More information about the Lazarus mailing list