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# This file shows the history of incompatible changes to
# Parrot that invalidated existing PBC (Parrot Byte Code) files.
#
# The text in this file is also the base of the
# fingerprint inside PBCs and Parrot which is used
# for validation.
#
# Its probably not complete or out of date - but a start
# to get less restrictive fingerprint tests.
#
# Currently known actions that should be entered here
# (and invalidate PBC are):
#
# - bumping Parrot version
# - deleting/changing/inserting existing ops in ops.num
# - changing operands of existing ops
# - adding/deleting/renaming a PMC to classes
# - changes in the packfile format itself
# - other core changes that invalidate byte code :)
#
# After changing PBC_COMPAT either disable t/native_pbc tests or
# better, if you have an i386 box at hand, regenerate the PBCs
# with tools/dev/mk_native_pbc and commit the changes

# please insert tab separated entries at the top of the list

2005.12.04 leo released 0.4.0, deleted opcodes
2005.12.01 leo inserted another pic ops
2005.11.22 leo changed PBC format (HLL_info)
2005.11.13 leo freeze outer_sub with Subs in PBC
2005.11.12 leo freeze lex_info with Subs in PBC
2005.11.06 leo deleted newsub, foldup, pack; 0.3.1 release
2005.10.17 leo deleted register stack opcodes
2005.10.15 jonathan changed debug segment format
2005.10.11 leo added reg usage to Subs in PBC
2005.10.07 leo deleted lot of opcodes
2005.10.05 leo deleted rx_ opcodes
2005.10.01 leo 0.3.0 release
2005.08.05 leo 0.2.3 release
2005.07.03 leo 0.2.2 release; add fixedintegerarray.freeze
2005.06.04 leo 0.2.1 release
2005.05.31 leo added HLL_id to frozen sub structure
2005.05.11 leo MMD function number change (rm MMD_I_LOGICAL...)
2005.05.08 leo 0.2.0 release
2005.04.22 leo removed add_p_* and friends, insert infix ops
2005.03.06 leo 0.1.2 release
2004.11.27 leo tossed 36 ops: gt,ge,isgt,isge w. I,N,S args
2004.11.27 leo tossed 13 ops: forgot some op_n_i
2004.11.27 leo tossed 177 ops: constants only, mixed args
2004.11.11 leo updates ops.num with some renumbering
2004.10.09 leo 0.1.1 release
2004.09.26 leo insert non-branching compare ops
2004.09.24 leo insert interpinfo_p opcodes
2004.02.29 leo 0.1.0 release
2003.11.21 leo remove unused size fields in front of PF constants
2003.10.31 leo 0.0.13 release
2003.10.24 dan add bogus opcode
2003.10.24 leo start using this file for fingerprinting
2003.10.22 dan add delegates.pmc
2003.10.21 dan delete instantiate op
2003.10.21 leo start this file
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