Re: Regression in 2.6.7 on powerpc: Internal error #10 "Object is of the wrong type." at 0x10c5e4fc

P. S. And yeah, there are two separate bugs:

1. Regression breaking Big endian archs, fixed on master but not in the
current release.

2. Missing os_context_float_register_addr for subset of powerpc systems
(perhaps all aside from Linux and FreeBSD).

They just happened to coincide in one release.


On Wed, Aug 12, 2026 at 1:59 AM Sergey Fedorov <[email protected]> wrote:

> If you would look at the log,
>
> > Missing required foreign symbol 'os_context_float_register_addr'
>
> Something in the code unconditionally requires a symbol which has not been
> implemented.
> I have simply shown where it was added for Linux and FreeBSD.
>
> I don’t know how else to read this aside from this being a bug in the
> source.
>
> On Tue, Aug 11, 2026 at 10:28 PM Stas Boukarev <[email protected]> wrote:
>
>> What are these commits saying? It has #+linux and #-linux. I guess it
>> says that someone can't read code.
>>
>> On Tue, Aug 11, 2026 at 1:35 PM Sergey Fedorov <[email protected]>
>> wrote:
>> >
>> > I guess someone unconditionally enabled a new feature without ensuring
>> it is actually implemented.
>> >
>> > Linux:
>> https://github.com/sbcl/sbcl/commit/ebd5ead14785e14c5c17c4b23a228bff385cb27e
>> > FreeBSD:
>> https://github.com/sbcl/sbcl/commit/acd0f7e95afd60d0c3241cf8b7c7a02677b30514
>> >
>> > Darwin:
>> > Other BSD:
>> >
>> >
>> >
>> > On Tue, Aug 11, 2026 at 6:19 PM Sergey Fedorov <[email protected]>
>> wrote:
>> >>
>> >> 2.6.7 does not build on powerpc now. 2.6.6 built earlier.
>> >>
>> >> :info:build obj/from-xc/src/code/target-format.lisp-obj
>> >> :info:build obj/from-xc/src/code/late-globaldb.lisp-obj
>> >> :info:build ; SB-Loader: (174+5212) methods/other
>> >> :info:build SB-XC:*FEATURES* =
>> >> :info:build (:PPC :GENCGC :ALIEN-CALLBACKS :ANSI-CL
>> :ANSI-COMPLIANT-LOAD-TRUENAME
>> >> :info:build  :BIG-ENDIAN :BSD :COMMON-LISP :COMPARE-AND-SWAP-VOPS
>> :DARWIN :GENERATIONAL
>> >> :info:build  :IEEE-FLOATING-POINT :MACH-O :OS-PROVIDES-BLKSIZE-T
>> :OS-PROVIDES-DLADDR
>> >> :info:build  :OS-PROVIDES-DLOPEN :OS-PROVIDES-PTHREAD-SETNAME-NP
>> :OS-PROVIDES-SUSECONDS-T
>> >> :info:build  :PACKAGE-LOCAL-NICKNAMES :SB-AFTER-XC-CORE
>> :SB-CORE-COMPRESSION :SB-DOC
>> >> :info:build  :SB-EVAL :SB-LDB :SB-PACKAGE-LOCKS :SB-SOURCE-LOCATIONS
>> :SB-THREAD :SB-UNICODE
>> >> :info:build  :SB-XREF-FOR-INTERNALS :SBCL :UNIX)
>> >> :info:build [building initial core file in "output/cold-sbcl.core":
>> >> :info:build writing 4096 bytes [1 page] from #<SB-FASL::GSPACE
>> @#x4100000 :STATIC>
>> >> :info:build writing 28061696 bytes [6851 pages] from #<SB-FASL::GSPACE
>> @#x10000000 :DYNAMIC>
>> >> :info:build writing 0 bytes [0 pages] from #<SB-FASL::GSPACE
>> @#x4000000 :READ-ONLY>
>> >> :info:build movable dynamic space: 421 + 3594 + 2836 cons/code/mixed
>> pages
>> >> :info:build /INITIAL-FUN=#X119A81ED
>> >> :info:build done]
>> >> :info:build //testing for consistency of first and second GENESIS
>> passes
>> >> :info:build //header files match between first and second GENESIS --
>> good
>> >> :info:build real 9m30.808s
>> >> :info:build user 7m19.486s
>> >> :info:build sys 1m28.800s
>> >> :info:build //entering make-target-2.sh
>> >> :info:build //doing warm init - compilation phase
>> >> :info:build This is SBCL 2.6.7, an implementation of ANSI Common Lisp.
>> >> :info:build More information about SBCL is available at <
>> http://www.sbcl.org/>.
>> >> :info:build SBCL is free software, provided as is, with absolutely no
>> warranty.
>> >> :info:build It is mostly in the public domain; some portions are
>> provided under
>> >> :info:build BSD-style licenses.  See the CREDITS and COPYING files in
>> the
>> >> :info:build distribution for more information.
>> >> :info:build Initial page table:
>> >> :info:build      | Immobile Objects |
>> >> :info:build  Gen layout symbol   code  Boxed   Cons    Raw   Code
>> SmMix  Mixed  LgRaw LgCode  LgMix Waste%       Alloc        Trig   Dirty
>> GCs Mem-age
>> >> :info:build   6      0      0      0      0    421      0   3594
>> 243   2593      0      0      0    0.5    27930752     2000000    3594   0
>> 0.0000
>> >> :info:build Tot      0      0      0      0    421      0   3594
>> 243   2593      0      0      0    0.5    27930752 [5.2% of 536870912 max]
>> >> :info:build Missing required foreign symbol
>> 'os_context_float_register_addr'
>> >> :info:build COLD-INIT... Checking symbol printer: T
>> >> :info:build (Length(TLFs)= 5212)
>> >> :info:build "obj/from-xc/src/code/show.lisp-obj"
>> >> :info:build "obj/from-xc/src/compiler/early-constantp.lisp-obj"
>> >> :info:build "obj/from-xc/src/compiler/vop-existsp.lisp-obj"
>> >> . . .
>> >> :info:build "obj/from-xc/src/code/early-defmethod.lisp-obj"
>> >> :info:build "obj/from-xc/src/code/format.lisp-obj"
>> >> :info:build "obj/from-xc/src/code/target-format.lisp-obj"
>> >> :info:build "obj/from-xc/src/code/late-globaldb.lisp-obj"
>> >> :info:build Internal error #10 "Object is of the wrong type." at
>> 0x10c5e4fc
>> >> :info:build     SC: 0, Offset: 26  0x00000000: even fixnum: 0
>> >> :info:build     SC: 3, Offset: 22 $1=  0x10c37001: instance pointer
>> >> :info:build    slot 1: 0x201 [raw]
>> >> :info:build    slot 13: 0xffffff96 [raw]
>> >> :info:build    slot 14: 0xffffffa3 [raw]
>> >> :info:build    slot 15: 0x0 [raw]
>> >> :info:build    slot 16: 0x0 [raw]
>> >> :info:build    slot 17: 0x0 [raw]
>> >> :info:build    slot 18: 0x0 [raw]
>> >> :info:build    slot 19: 0xfffffffe [raw]
>> >> :info:build fatal error encountered in SBCL pid 9687 pthread
>> 0xa0260620:
>> >> :info:build internal error too early in init, can't recover
>> >> :info:build Welcome to LDB, a low-level debugger for the Lisp runtime
>> environment.
>> >> :info:build Command failed:  cd
>> "/opt/local/var/macports/build/sbcl-0027f3db/work/sbcl-2.6.7" && sh make.sh
>> --prefix=/opt/local --xc-host=/opt/local/libexec/sbcl-bootstrap/bin/sbcl
>> --arch=ppc --without-sb-simd --fancy
>> >> :info:build Exit code: 149
>> >
>> > _______________________________________________
>> > Sbcl-devel mailing list
>> > [email protected]
>> > https://lists.sourceforge.net/lists/listinfo/sbcl-devel
>>
>

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