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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

6.21 2010.06.09 NotFound add ByteBuffer PMC
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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