-;;; This value should be incremented when the system changes in such
-;;; a way that it will no longer work reliably with old fasl files.
-(defconstant +fasl-file-version+ 18)
-;;; 2 = sbcl-0.6.4 uses COMPILE-OR-LOAD-DEFGENERIC.
-;;; 3 = sbcl-0.6.6 uses private symbol, not :EMPTY, for empty HASH-TABLE slot.
-;;; 4 = sbcl-0.6.7 uses HAIRY-DATA-VECTOR-REF and HAIRY-DATA-VECTOR-SET
-;;; when array headers or data element type uncertainty exist, and
-;;; uses DATA-VECTOR-REF and DATA-VECTOR-SET only for VOPs. (Thus,
-;;; full calls to DATA-VECTOR-REF and DATA-VECTOR-SET from older
-;;; fasl files would fail, because there are no DEFUNs for these
-;;; operations any more.)
-;;; 5 = sbcl-0.6.8 has rearranged static symbols.
-;;; 6 = sbcl-0.6.9, got rid of non-ANSI %DEFCONSTANT/%%DEFCONSTANT stuff
-;;; and deleted a slot from DEBUG-SOURCE structure.
-;;; 7 = around sbcl-0.6.9.8, merged SB-CONDITIONS package into SB-KERNEL
-;;; 8 = sbcl-0.6.10.4 revived Gray stream support, changing stream layouts.
-;;; 9 = deleted obsolete CONS-UNIQUE-TAG bytecode in sbcl-0.6.11.8
-;;; (somewhere in here also changes to AND and OR CTYPE layouts)
-;;; 10 = new layout for CONDITION in sbcl-0.6.11.38
-;;; 11 = (a) new helper functions for MAKE-LOAD-FORM (HASH-TABLE) in
-;;; sbcl-0.6.12.11
-;;; (b) new address space constants for OpenBSD in 0.6.12.17
-;;; (doesn't need separate version from (a) because the
-;;; OpenBSD port was broken from sometime before 0.6.12.11
-;;; until the address space was changed)
-;;; 12 = sbcl-0.6.12.22 added new SB-FASL package
-;;; 13 = sbcl-0.6.12.28 removed some elements from *STATIC-SYMBOLS*
-;;; 14 = sbcl-0.6.12.29 removed more elements from *STATIC-SYMBOLS*
-;;; 15 = sbcl-0.6.12.33 changed the layout of STREAM
-;;; 16 = sbcl-0.pre7.15 changed the layout of PRETTY-STREAM
-;;; 17 = sbcl-0.pre7.38 (merging many changes accumulated in
-;;; the sbcl-0.pre7.37.flaky5.* branch back into the main branch)
-;;; got rid of byte compiler, byte interpreter, and IR1
-;;; interpreter, changed %DEFUN and DEFSTRUCT, changed the
-;;; meaning of FOP-FSET, and changed the layouts of various
-;;; internal compiler structures (e.g. DEFSTRUCT CLAMBDA)
-;;; 18 = sbcl-0.pre7.39 swapped FUNCTION-POINTER-TYPE and
-;;; INSTANCE-POINTER-TYPE low-level type codes to help with
-;;; the PPC port
+;;; This value should be incremented when the system changes in such a
+;;; way that it will no longer work reliably with old fasl files. In
+;;; practice, I (WHN) have often forgotten to increment it for CVS
+;;; versions which break binary compatibility. But it certainly should
+;;; be incremented for release versions which break binary
+;;; compatibility.
+(def!constant +fasl-file-version+ 52)
+;;; (record of versions before 2003 deleted in 2003-04-26/0.pre8.107 or so)
+;;; 38: (2003-01-05) changed names of internal SORT machinery
+;;; 39: (2003-02-20) in 0.7.12.1 a slot was added to
+;;; DEFSTRUCT-SLOT-DESCRIPTION
+;;; 40: (2003-03-11) changed value of (SXHASH NIL)
+;;; 41: (2003-04-26) enforced binary incompatibility between +SB-THREAD
+;;; and -SB-THREAD builds
+;;; 42: (2003-05-22) %NAME slot changed to NAME in
+;;; DEFSTRUCT-SLOT-DESCRIPTION
+;;; 43: (2003-07-18) Something could easily have changed incompatibly in
+;;; recent maintenance, e.g. from (VECTOR NIL)-as-string support.
+;;; (And experimental results suggest that compatibility was broken
+;;; between about 0.8.1.29 and 0.8.1.39.)
+;;; 44: (2003-08-25) various changes leading up to 0.8.3
+;;; <dan`b> what happened this month to stalate the fasls?
+;;; <Krystof_> I think I renumbered everything again
+;;; <Krystof_> simple-array-unsigned-byte-7, probably
+;;; <Krystof_> (thanks to pfdietz)
+;;; 45: (2003-10-02) I (WHN) incremented the version for the 0.8.4
+;;; release because I couldn't immediately convince myself that
+;;; .fasl files could never possibly ever refer to the SB-C
+;;; CONTINUATION-related data types which were changed
+;;; incompatibly in 0.8.3.62.
+;;; 46: (2003-11-11) Tim Daly, Jr. (and Christophe Rhodes) reported
+;;; .fasl incompatibility on sbcl-devel 2003-11-09.
+;;; 47: (2003-11-30) Static variables were rearranged in 0.8.6.11.
+;;; 48: (2004-03-01) Renumbered all the widetags to allow for more
+;;; microefficiency in sbcl-0.8.8.10
+;;; 49: (2004-05-04) Changed implementation of DEFFOO macros and the
+;;; functions they expand to.
+;;; 50: (2004-05-20) Changed %COMPILER-DEFUN signature again.
+;;; 51: (2004-07-24) Package locks (SBCL 0.8.12.7) changed signature of
+;;; %DEFPACKAGE.
+;;; 52: (2004-11-02) Merge of SB-UNICODE.