name of circuits over 256 characters in length causing corruption of ap files

this is just a symptom, the actual error was caused by the file being written with truncation of the NET name to 256 characters. https://bugs.libre-soc.org/show_bug.cgi?id=526#c88

  Renaming cloned cell: "<id:926510 Cell fsm>"
  Renaming cloned cell: "<id:927937 Cell irblock>"
MBK_OUT_LO=al; export MBK_OUT_LO; MBK_SEPAR='_'; export MBK_SEPAR; /home/lkcl/alliance/install/bin/cougar       -c -f chip_r chip_r_ext

*** mbk error *** alcloadphfig : missing or non-numeric field
( line 319054 parsing corona_cts_r.ap )


  Renaming cloned cell: "<id:926510 Cell fsm>"
  Renaming cloned cell: "<id:927937 Cell irblock>"
MBK_OUT_LO=al; export MBK_OUT_LO; MBK_SEPAR='_'; export MBK_SEPAR; /home/lkcl/alliance/install/bin/cougar       -c -f chip_r chip_r_ext

*** mbk error *** alcloadphfig : missing or non-numeric field
( line 319054 parsing corona_cts_r.ap )

S 1775000,593000,1779000,593000,300,core.subckt_29416_test_issuer.subckt_1_ti.subckt_2768_core.subckt_4053_fus.subckt_7_shiftrot0.subckt_1078_alu_shift_rot0.subckt_0_pipe1_110.subckt_472_main_114.subckt_12_rotator.subckt_592_right_mask.abc_641657_new_n108,RIGHT,ALU2