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# This file shows the history of incompatible changes to
# Parrot that invalidated existing PBC (Parrot Byte Code) files.
#
# The latest version number of the bytecode format in this file
# is used by Parrot to version the bytecode files it writes and
# is able to read. In the future, Parrot should be able to read
# and/or write older bytecode versions too.
#
# Currently known actions that should be entered here
# (and invalidate PBC are):
#
# - 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
# - changes to any PMCs that are frozen into the .pbc like
# ParrotInterpreter (HLL_info), Subs and more
# - 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
# TODO TT #361: all .pbc files should make-depend on PBC_COMPAT
# Also, don't forget to run tools/dev/mk_packfile_pbc to rebuild PBCs
# used for testing Packfile* PMCs.
# please insert tab separated entries at the top of the list
6.20 2010.05.29 plobsing eliminate unused fixup type 'label'
6.19 2010.05.27 plobsing removed numerous core ops (TT #449)
6.18 2010.05.25 cotto removed ops.num
6.17 2010.05.20 NotFound store encoding of string constants
6.16 2010.05.18 plobsing move freeze/thaw adjacent to visit
6.15 2010.05.06 bacek add StringBuilder PMC
6.14 2010.05.03 coke remove popaction, pushmark, pushaction ops.
6.13 2010.05.03 coke move File/OS pmcs to src/dynpmc
6.12 2010.05.02 plobsing store constant PMC strings as top level constant strings
6.11 2010.04.29 tewk remove ParrotRunningThread
6.10 2010.04.29 NotFound packfiledebug.pmc
6.9 2010.04.27 bacek remove deprecated in-place string ops (bitwise, charset, case change)
6.8 2010.04.27 bacek remove deprecated in-place substr ops
6.7 2010.04.22 coke remove RetContinuation PMC
6.6 2010.04.17 bacek add replace op
6.5 2010.03.09 cotto remove cpu_ret op
6.4 2010.03.02 cotto remove prederef__ and reserved
6.3 2010.02.16 whiteknight Add OpLib and Opcode PMCs
6.2 2010.01.31 cotto serialization-related changes to ParrotInterpreter
6.1 2010.01.30 whiteknight remove Array PMC
6.0 2010.01.19 chromatic released 2.0.0
5.1 2009.08.06 cotto remove branch_cs opcode
5.0 2009.07.21 cotto released 1.4.0
4.0 2009.03.17 allison released 1.0.0
3.0 2007.07.23 jonathan implementing new PBC header format
2.0 2005.11.22 leo changed PBC format (HLL_info)
1.0 2005.10.15 jonathan changed debug segment format
0.1 2003.10.21 leo start this file
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