Dear GHC team, I build by new DoCon program under ghc-5.04.3, installed from RPM to i386-unknown, RedHat Linux. Under -Onot, the command make space=-M22m docon builds the thing successfully. And for less memory, say, ... 16m ..., it ends with ... pol/Pgcd_.hs:184: Warning: No explicit method nor default method for `toSquareFree' In the instance declaration for `GCDRing (Pol a)' =================== INTERFACE HAS CHANGED ==================== No old interface available ghc-5.04.3: fatal error: update_fwd: unknown/strange object 38344 make: *** [obj] Error 254 I expected of GHC to report of exhausted memory. Probably, such behavior is not fatal for may aims, but if you consider this as an interesting bug, I could send the archive. ----------------- Serge Mechveliani mechvel@botik.ru