Re: Failures in random testing

Paul Dietz <[email protected]> Fri, 28 Nov 2025 23:16:02 -0500
Newsgroups	gmane.lisp.steel-bank.devel
Message-ID	<CAFELz=u3saGB+NOUpW3khhvb6G=37vosqcaqX+WWcsNJAnrC8Q@mail.gmail.com>
Those were on "2.5.10.157-6d2ffcff0" (x86-64).

On Fri, Nov 28, 2025 at 11:15 PM Paul Dietz <[email protected]> wrote:

> Here's an example:
>
> break
>    [Condition of type SIMPLE-CONDITION]
>
> Restarts:
>  0: [CONTINUE] Return from BREAK.
>  1: [RETRY] Retry SLIME REPL evaluation request.
>  2: [*ABORT] Return to SLIME's top level.
>  3: [ABORT] abort thread (#<THREAD tid=8107 "repl-thread" RUNNING
> {12084640D3}>)
>
> Backtrace:
>   0: (SB-C::IR1-CONVERT #<SB-C::CTRAN 1 {120314C003}> #<SB-C::CTRAN 2
> {120314C1F3}> #<SB-C::LVAR 3 {120314C223}> (THE FUNCTION #<SB-C::CLAMBDA
> :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME (LAMBDA # :IN B5)..
>   1: (SB-C::IR1-CONVERT-%FUNCALL #<SB-C::CTRAN 1 {120314C003}>
> #<SB-C::CTRAN 4 {120314BDA3}> #<SB-C::LVAR 5 {120314BDD3}> (SB-C::%FUNCALL
> #<SB-C::CLAMBDA :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME (LAMBD..
>   2: (SB-C::IR1-CONVERT #<SB-C::CTRAN 1 {120314C003}> #<SB-C::CTRAN 4
> {120314BDA3}> #<SB-C::LVAR 5 {120314BDD3}> (SB-C::%FUNCALL #<SB-C::CLAMBDA
> :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME (LAMBDA # :IN B..
>   3: (SB-C::IR1-CONVERT-PROGN-BODY #<SB-C::CTRAN 1 {120314C003}>
> #<SB-C::CTRAN 4 {120314BDA3}> #<SB-C::LVAR 5 {120314BDD3}> ((SB-C::%FUNCALL
> #<SB-C::CLAMBDA :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME # :..
>   4: (SB-C::IR1-TRANSLATE-LOCALLY ((SB-C::%FUNCALL #<SB-C::CLAMBDA
> :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME # :KIND # :TYPE
> #<SB-KERNEL:BUILT-IN-CLASSOID FUNCTION (read-only)> :WHERE-FROM :DEFINED
> :VAR..
>   5: (SB-C::IR1-CONVERT-LET #<SB-C::CTRAN 1 {120314C003}> #<SB-C::CTRAN 4
> {120314BDA3}> #<SB-C::LVAR 5 {120314BDD3}> (LET NIL (SB-C::%FUNCALL
> #<SB-C::CLAMBDA :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME # ..
>   6: (SB-C::IR1-CONVERT #<SB-C::CTRAN 1 {120314C003}> #<SB-C::CTRAN 4
> {120314BDA3}> #<SB-C::LVAR 5 {120314BDD3}> (LET NIL (SB-C::%FUNCALL
> #<SB-C::CLAMBDA :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME # :KIN..
>   7: (SB-C::IR1-CONVERT-PROGN-BODY #<SB-C::CTRAN 1 {120314C003}>
> #<SB-C::CTRAN 4 {120314BDA3}> #<SB-C::LVAR 5 {120314BDD3}> ((LET NIL
> (SB-C::%FUNCALL # V1 V5 #))))
>   8: (SB-C::IR1-CONVERT-AUX-BINDINGS #<SB-C::CTRAN 1 {120314C003}>
> #<SB-C::CTRAN 4 {120314BDA3}> #<SB-C::LVAR 5 {120314BDD3}> ((LET NIL
> (SB-C::%FUNCALL # V1 V5 #))) NIL NIL NIL :VALUE-SOURCE-FORMS NIL)
>   9: (SB-C::IR1-CONVERT-SPECIAL-BINDINGS #<SB-C::CTRAN 1 {120314C003}>
> #<SB-C::CTRAN 4 {120314BDA3}> #<SB-C::LVAR 5 {120314BDD3}> ((LET NIL
> (SB-C::%FUNCALL # V1 V5 #))) NIL NIL NIL NIL :VALUE-SOURCE-FORMS ..
>  10: (SB-C::IR1-CONVERT-LAMBDA-BODY ((LET NIL (SB-C::%FUNCALL # V1 V5 #)))
> (#<SB-C::LAMBDA-VAR :%SOURCE-NAME V1 {120314B833}> #<SB-C::LAMBDA-VAR
> :%SOURCE-NAME V5 {120314B8F3}> #<SB-C::LAMBDA-VAR :%SOURCE-N..
>  11: (SB-C::IR1-CONVERT-HAIRY-ARGS #<SB-C::OPTIONAL-DISPATCH :%SOURCE-NAME
> SB-C::.ANONYMOUS. :%DEBUG-NAME #1=(LAMBDA (&OPTIONAL V1 V5 &REST
> #2=#:IGNORE) :IN B5) :TYPE #3=#<SB-KERNEL:BUILT-IN-CLASSOID FUNCT..
>  12: (SB-C::IR1-CONVERT-HAIRY-ARGS #<SB-C::OPTIONAL-DISPATCH :%SOURCE-NAME
> SB-C::.ANONYMOUS. :%DEBUG-NAME #1=(LAMBDA (&OPTIONAL V1 V5 &REST
> #2=#:IGNORE) :IN B5) :TYPE #3=#<SB-KERNEL:BUILT-IN-CLASSOID FUNCT..
>  13: (SB-C::IR1-CONVERT-HAIRY-ARGS #<SB-C::OPTIONAL-DISPATCH :%SOURCE-NAME
> SB-C::.ANONYMOUS. :%DEBUG-NAME #1=(LAMBDA (&OPTIONAL V1 V5 &REST
> #2=#:IGNORE) :IN B5) :TYPE #3=#<SB-KERNEL:BUILT-IN-CLASSOID FUNCT..
>  14: (SB-C::IR1-CONVERT-LAMBDA (LAMBDA (&OPTIONAL V1 V5 &REST .
> #1=(#:IGNORE)) (DECLARE (IGNORE . #1#)) (BOOLE BOOLE-AND V1 V1))
> :SOURCE-NAME SB-C::.ANONYMOUS. :DEBUG-NAME (LAMBDA (&OPTIONAL V1 V5 &REST
> #:..
>  15: (SB-C::FIND-OR-CONVERT-FUN-LEAF (LAMBDA (&OPTIONAL V1 V5 &REST .
> #1=(#:IGNORE)) (DECLARE (IGNORE . #1#)) (BOOLE BOOLE-AND V1 V1))
> #<SB-C::CTRAN 6 {12031495D3}>)
>  16: (SB-C::IR1-CONVERT-FUNCTION #<SB-C::CTRAN 6 {12031495D3}>
> #<SB-C::CTRAN 7 {1203149723}> #<SB-C::LVAR 8 {1203149753}> (FUNCTION
> (LAMBDA (&OPTIONAL V1 V5 &REST #:IGNORE) (DECLARE #) (BOOLE BOOLE-AND V1 ..
>  17: (SB-C::IR1-CONVERT #<SB-C::CTRAN 6 {12031495D3}> #<SB-C::CTRAN 7
> {1203149723}> #<SB-C::LVAR 8 {1203149753}> (FUNCTION (LAMBDA (&OPTIONAL V1
> V5 &REST #:IGNORE) (DECLARE #) (BOOLE BOOLE-AND V1 V1))))
>  18: (SB-C::IR1-CONVERT-MULTIPLE-VALUE-CALL #<SB-C::CTRAN 6 {12031495D3}>
> #<SB-C::CTRAN 9 {12031494A3}> #<SB-C::LVAR 10 {12031494D3}>
> (MULTIPLE-VALUE-CALL (FUNCTION (LAMBDA # # #)) (IF (NOT #) (VALUES # #)..
>  19: (SB-C::IR1-CONVERT #<SB-C::CTRAN 6 {12031495D3}> #<SB-C::CTRAN 9
> {12031494A3}> #<SB-C::LVAR 10 {12031494D3}> (MULTIPLE-VALUE-CALL (FUNCTION
> (LAMBDA # # #)) (IF (NOT #) (VALUES # #) (VALUES 160435353 #..
>  20: (SB-C::IR1-CONVERT-COMMON-FUNCTOID #<SB-C::CTRAN 6 {12031495D3}>
> #<SB-C::CTRAN 9 {12031494A3}> #<SB-C::LVAR 10 {12031494D3}>
> (MULTIPLE-VALUE-BIND (V1 V5) (IF (NOT #) (VALUES # #) (VALUES 160435353
> #))..
>  21: (SB-C::IR1-CONVERT #<SB-C::CTRAN 6 {12031495D3}> #<SB-C::CTRAN 9
> {12031494A3}> #<SB-C::LVAR 10 {12031494D3}> (MULTIPLE-VALUE-BIND (V1 V5)
> (IF (NOT #) (VALUES # #) (VALUES 160435353 #)) (BOOLE BOOLE-AN..
>  22: (SB-C::IR1-CONVERT-COMMON-FUNCTOID #<SB-C::CTRAN 6 {12031495D3}>
> #<SB-C::CTRAN 9 {12031494A3}> #<SB-C::LVAR 10 {12031494D3}> (MVB-IF (V1 V5)
> (NOT (OR # #)) ((BOOLE BOOLE-AND C C) (GCD #1=# #1#)) (1604..
>  23: (SB-C::IR1-CONVERT #<SB-C::CTRAN 6 {12031495D3}> #<SB-C::CTRAN 9
> {12031494A3}> #<SB-C::LVAR 10 {12031494D3}> (MVB-IF (V1 V5) (NOT (OR # #))
> ((BOOLE BOOLE-AND C C) (GCD #1=# #1#)) (160435353 (LET* # 28..
>  24: (SB-C::IR1-CONVERT-PROGN-BODY #<SB-C::CTRAN 6 {12031495D3}>
> #<SB-C::CTRAN 9 {12031494A3}> #<SB-C::LVAR 10 {12031494D3}> ((MVB-IF (V1
> V5) (NOT #) (# #) (160435353 #) (BOOLE BOOLE-AND V1 V1))))
>  25: (SB-C::IR1-CONVERT-BLOCK #<SB-C::CTRAN 11 {12031483A3}> #<SB-C::CTRAN
> 9 {12031494A3}> #<SB-C::LVAR 10 {12031494D3}> (BLOCK B1 (MVB-IF (V1 V5)
> (NOT #) (# #) (160435353 #) (BOOLE BOOLE-AND V1 V1))))
>  26: (SB-C::IR1-CONVERT #<SB-C::CTRAN 11 {12031483A3}> #<SB-C::CTRAN 9
> {12031494A3}> #<SB-C::LVAR 10 {12031494D3}> (BLOCK B1 (MVB-IF (V1 V5) (NOT
> #) (# #) (160435353 #) (BOOLE BOOLE-AND V1 V1))))
>  27: (SB-C::IR1-CONVERT-COMBINATION-ARGS #<SB-C::LVAR 12 {12031483D3}>
> #<SB-C::CTRAN 11 {12031483A3}> #<SB-C::CTRAN 13 {1203147E43}> #<SB-C::LVAR
> 14 {1203147E73}> ((BLOCK B1 (MVB-IF # # # # #))) :PASS-NARG..
>  28: (SB-C::IR1-CONVERT-LET #<SB-C::CTRAN 15 {12031480B3}> #<SB-C::CTRAN
> 13 {1203147E43}> #<SB-C::LVAR 14 {1203147E73}> (LET ((#1=#:MINREST11 #))
> (IF (> #1# #2=#:ARG010) #1# #2#)))
>  29: (SB-C::IR1-CONVERT #<SB-C::CTRAN 15 {12031480B3}> #<SB-C::CTRAN 13
> {1203147E43}> #<SB-C::LVAR 14 {1203147E73}> (LET ((#1=#:MINREST11 #)) (IF
> (> #1# #2=#:ARG010) #1# #2#)))
>  30: (SB-C::IR1-CONVERT-PROGN-BODY #<SB-C::CTRAN 15 {12031480B3}>
> #<SB-C::CTRAN 13 {1203147E43}> #<SB-C::LVAR 14 {1203147E73}> ((LET (#) (IF
> # #:MINREST11 #:ARG010))))
>  31: (SB-C::IR1-CONVERT-AUX-BINDINGS #<SB-C::CTRAN 15 {12031480B3}>
> #<SB-C::CTRAN 13 {1203147E43}> #<SB-C::LVAR 14 {1203147E73}> ((LET (#) (IF
> # #:MINREST11 #:ARG010))) NIL NIL NIL :VALUE-SOURCE-FORMS NIL)
>  32: (SB-C::IR1-CONVERT-SPECIAL-BINDINGS #<SB-C::CTRAN 15 {12031480B3}>
> #<SB-C::CTRAN 13 {1203147E43}> #<SB-C::LVAR 14 {1203147E73}> ((LET (#) (IF
> # #:MINREST11 #:ARG010))) NIL NIL NIL NIL :VALUE-SOURCE-FO..
>  33: (SB-C::IR1-CONVERT-LAMBDA-BODY ((LET (#) (IF # #:MINREST11
> #:ARG010))) (#<SB-C::LAMBDA-VAR :%SOURCE-NAME #:ARG010 {1203147AC3}>)
> :AUX-VARS NIL :AUX-VALS NIL :SOURCE-NAME SB-C::.ANONYMOUS. :DEBUG-NAME ..
>  34: (SB-C::IR1-CONVERT-LET #<SB-C::CTRAN 16 {1203146833}> #<SB-C::CTRAN
> 17 {1203147933}> #<SB-C::LVAR 18 {1203147963}> (LET ((#1=#:ARG010 0)) (LET
> (#) (IF # #:MINREST11 #1#))))
>  35: (SB-C::IR1-CONVERT #<SB-C::CTRAN 16 {1203146833}> #<SB-C::CTRAN 17
> {1203147933}> #<SB-C::LVAR 18 {1203147963}> (LET ((#1=#:ARG010 0)) (LET (#)
> (IF # #:MINREST11 #1#))))
>  36: (SB-C::IR1-CONVERT-SRCTRAN #<SB-C::CTRAN 16 {1203146833}>
> #<SB-C::CTRAN 17 {1203147933}> #<SB-C::LVAR 18 {1203147963}>
> #<SB-C::GLOBAL-VAR :%SOURCE-NAME MAX :TYPE #1=#<SB-KERNEL:FUN-TYPE
> (FUNCTION (REA..
>  37: (SB-C::IR1-CONVERT #<SB-C::CTRAN 16 {1203146833}> #<SB-C::CTRAN 17
> {1203147933}> #<SB-C::LVAR 18 {1203147963}> (MAX 0 (BLOCK B1 (MVB-IF # # #
> # #))))
>  38: (SB-C::IR1-CONVERT-COMBINATION-ARGS #<SB-C::LVAR 19 {1203146863}>
> #<SB-C::CTRAN 16 {1203146833}> #<SB-C::CTRAN 20 {12031462E3}> #<SB-C::LVAR
> 21 {1203146313}> ((MAX 0 (BLOCK B1 #))) :PASS-NARGS T :ARG-..
>  39: (SB-C::IR1-CONVERT-LET #<SB-C::CTRAN 22 {1203146543}> #<SB-C::CTRAN
> 20 {12031462E3}> #<SB-C::LVAR 21 {1203146313}> (LET ((#1=#:MAXREST9 #)) (IF
> (< #1# #2=#:ARG08) #1# #2#)))
>  40: (SB-C::IR1-CONVERT #<SB-C::CTRAN 22 {1203146543}> #<SB-C::CTRAN 20
> {12031462E3}> #<SB-C::LVAR 21 {1203146313}> (LET ((#1=#:MAXREST9 #)) (IF (<
> #1# #2=#:ARG08) #1# #2#)))
>  41: (SB-C::IR1-CONVERT-PROGN-BODY #<SB-C::CTRAN 22 {1203146543}>
> #<SB-C::CTRAN 20 {12031462E3}> #<SB-C::LVAR 21 {1203146313}> ((LET (#) (IF
> # #:MAXREST9 #:ARG08))))
>  42: (SB-C::IR1-CONVERT-AUX-BINDINGS #<SB-C::CTRAN 22 {1203146543}>
> #<SB-C::CTRAN 20 {12031462E3}> #<SB-C::LVAR 21 {1203146313}> ((LET (#) (IF
> # #:MAXREST9 #:ARG08))) NIL NIL NIL :VALUE-SOURCE-FORMS NIL)
>  43: (SB-C::IR1-CONVERT-SPECIAL-BINDINGS #<SB-C::CTRAN 22 {1203146543}>
> #<SB-C::CTRAN 20 {12031462E3}> #<SB-C::LVAR 21 {1203146313}> ((LET (#) (IF
> # #:MAXREST9 #:ARG08))) NIL NIL NIL NIL :VALUE-SOURCE-FORM..
>  44: (SB-C::IR1-CONVERT-LAMBDA-BODY ((LET (#) (IF # #:MAXREST9 #:ARG08)))
> (#<SB-C::LAMBDA-VAR :%SOURCE-NAME #:ARG08 {1203145F63}>) :AUX-VARS NIL
> :AUX-VALS NIL :SOURCE-NAME SB-C::.ANONYMOUS. :DEBUG-NAME (LE..
>  45: (SB-C::IR1-CONVERT-LET #<SB-C::CTRAN 23 {1203145C83}> #<SB-C::CTRAN
> 24 {1203145DD3}> #<SB-C::LVAR 25 {1203145E03}> (LET ((#1=#:ARG08 12)) (LET
> (#) (IF # #:MAXREST9 #1#))))
>  46: (SB-C::IR1-CONVERT #<SB-C::CTRAN 23 {1203145C83}> #<SB-C::CTRAN 24
> {1203145DD3}> #<SB-C::LVAR 25 {1203145E03}> (LET ((#1=#:ARG08 12)) (LET (#)
> (IF # #:MAXREST9 #1#))))
>  47: (SB-C::IR1-CONVERT-SRCTRAN #<SB-C::CTRAN 23 {1203145C83}>
> #<SB-C::CTRAN 24 {1203145DD3}> #<SB-C::LVAR 25 {1203145E03}>
> #<SB-C::GLOBAL-VAR :%SOURCE-NAME MIN :TYPE #1=#<SB-KERNEL:FUN-TYPE
> (FUNCTION (REA..
>  48: (SB-C::IR1-CONVERT #<SB-C::CTRAN 23 {1203145C83}> #<SB-C::CTRAN 24
> {1203145DD3}> #<SB-C::LVAR 25 {1203145E03}> (MIN 12 (MAX 0 (BLOCK B1 #))))
>  49: (SB-C::IR1-CONVERT-COMBINATION-ARGS #<SB-C::LVAR 26 {1203145B13}>
> #<SB-C::CTRAN 27 {1203145AE3}> #<SB-C::CTRAN 28 {1203145823}> #<SB-C::LVAR
> 29 {1203145853}> ((THE (SIMPLE-ARRAY BIT #) #*0011111011110..
>  50: (SB-C::IR1-CONVERT-COMBINATION #<SB-C::CTRAN 30 {1203145953}>
> #<SB-C::CTRAN 28 {1203145823}> #<SB-C::LVAR 29 {1203145853}> (AREF (THE
> (SIMPLE-ARRAY BIT #) #*0011111011110) (MIN 12 (MAX 0 #))) #<SB-C::..
>  51: (SB-C::IR1-CONVERT-COMBINATION-CHECKING-TYPE #<SB-C::CTRAN 30
> {1203145953}> #<SB-C::CTRAN 28 {1203145823}> #<SB-C::LVAR 29 {1203145853}>
> (AREF (THE (SIMPLE-ARRAY BIT #) #*0011111011110) (MIN 12 (MAX 0..
>  52: (SB-C::IR1-CONVERT #<SB-C::CTRAN 30 {1203145953}> #<SB-C::CTRAN 28
> {1203145823}> #<SB-C::LVAR 29 {1203145853}> (AREF (THE (SIMPLE-ARRAY BIT #)
> #*0011111011110) (MIN 12 (MAX 0 #))))
>  53: (SB-C::IR1-CONVERT-SRCTRAN #<SB-C::CTRAN 30 {1203145953}>
> #<SB-C::CTRAN 28 {1203145823}> #<SB-C::LVAR 29 {1203145853}>
> #<SB-C::GLOBAL-VAR :%SOURCE-NAME SBIT :TYPE #1=#<SB-KERNEL:FUN-TYPE
> (FUNCTION (# ..
>  54: (SB-C::IR1-CONVERT #<SB-C::CTRAN 30 {1203145953}> #<SB-C::CTRAN 28
> {1203145823}> #<SB-C::LVAR 29 {1203145853}> (SBIT #*0011111011110 (MIN 12
> (MAX 0 #))))
>  55: (SB-C::IR1-CONVERT-PROGN-BODY #<SB-C::CTRAN 30 {1203145953}>
> #<SB-C::CTRAN 28 {1203145823}> #<SB-C::LVAR 29 {1203145853}> ((SBIT
> #*0011111011110 (MIN 12 #))))
>  56: (SB-C::IR1-CONVERT-BLOCK #<SB-C::CTRAN 31 {12031219D3}> #<SB-C::CTRAN
> 28 {1203145823}> #<SB-C::LVAR 29 {1203145853}> (BLOCK B5 (SBIT
> #*0011111011110 (MIN 12 #))))
>  57: (SB-C::IR1-CONVERT #<SB-C::CTRAN 31 {12031219D3}> #<SB-C::CTRAN 28
> {1203145823}> #<SB-C::LVAR 29 {1203145853}> (BLOCK B5 (SBIT #*0011111011110
> (MIN 12 #))))
>  58: (SB-C::IR1-CONVERT-COMBINATION-ARGS #<SB-C::LVAR 32 {1203121863}>
> #<SB-C::CTRAN 33 {1203121833}> #<SB-C::CTRAN 34 {1203121413}> #<SB-C::LVAR
> 35 {1203121443}> ((LCM (LOGXOR # #) (BIT #*1011101110001010..
>  59: (SB-C::IR1-CONVERT-COMBINATION #<SB-C::CTRAN 36 {1203121673}>
> #<SB-C::CTRAN 34 {1203121413}> #<SB-C::LVAR 35 {1203121443}> (* (LCM
> (LOGXOR # #) (BIT #*1011101110001010010 #)) (BLOCK B5 (SBIT #*0011111..
>  60: (SB-C::IR1-CONVERT-COMBINATION-CHECKING-TYPE #<SB-C::CTRAN 36
> {1203121673}> #<SB-C::CTRAN 34 {1203121413}> #<SB-C::LVAR 35 {1203121443}>
> (* (LCM (LOGXOR # #) (BIT #*1011101110001010010 #)) (BLOCK B5 (..
>  61: (SB-C::IR1-CONVERT #<SB-C::CTRAN 36 {1203121673}> #<SB-C::CTRAN 34
> {1203121413}> #<SB-C::LVAR 35 {1203121443}> (* (LCM (LOGXOR # #) (BIT
> #*1011101110001010010 #)) (BLOCK B5 (SBIT #*0011111011110 #))))
>  62: (SB-C::IR1-CONVERT-PROGN-BODY #<SB-C::CTRAN 36 {1203121673}>
> #<SB-C::CTRAN 34 {1203121413}> #<SB-C::LVAR 35 {1203121443}> ((* (LCM # #)
> (BLOCK B5 #))))
>  63: (SB-C::IR1-CONVERT-AUX-BINDINGS #<SB-C::CTRAN 36 {1203121673}>
> #<SB-C::CTRAN 34 {1203121413}> #<SB-C::LVAR 35 {1203121443}> ((* (LCM # #)
> (BLOCK B5 #))) NIL NIL NIL :VALUE-SOURCE-FORMS NIL)
>  64: (SB-C::IR1-CONVERT-SPECIAL-BINDINGS #<SB-C::CTRAN 36 {1203121673}>
> #<SB-C::CTRAN 34 {1203121413}> #<SB-C::LVAR 35 {1203121443}> ((* (LCM # #)
> (BLOCK B5 #))) NIL NIL NIL NIL :VALUE-SOURCE-FORMS NIL)
>  65: (SB-C::IR1-CONVERT-LAMBDA-BODY ((* (LCM # #) (BLOCK B5 #)))
> (#<SB-C::LAMBDA-VAR :%SOURCE-NAME A :TYPE #<SB-KERNEL:NUMERIC-UNION-TYPE
> (INTEGER -6 28)> :WHERE-FROM :DECLARED {1203120C23}> #<SB-C::LAMBDA..
>  66: (SB-C::IR1-CONVERT-LAMBDA (LAMBDA #1=(A B C) (DECLARE (TYPE # A))
> (DECLARE (TYPE # B)) (DECLARE (TYPE # C)) (DECLARE (IGNORABLE . #1#)) ...)
> :SOURCE-NAME SB-C::.ANONYMOUS. :DEBUG-NAME (LAMBDA (A B C))..
>  67: (SB-C::IR1-TOPLEVEL-FOR-COMPILE (LAMBDA #1=(A B C) (DECLARE (TYPE #
> A)) (DECLARE (TYPE # B)) (DECLARE (TYPE # C)) (DECLARE (IGNORABLE . #1#))
> ...) NIL)
>  68: (SB-C::%COMPILE (LAMBDA #1=(A B C) (DECLARE (TYPE # A)) (DECLARE
> (TYPE # B)) (DECLARE (TYPE # C)) (DECLARE (IGNORABLE . #1#)) ...) NIL NIL)
>  69: ((LAMBDA NIL :IN SB-C:COMPILE-IN-LEXENV))
>  70: ((FLET SB-C::WITH-IT :IN SB-C::%WITH-COMPILATION-UNIT))
>  71: (SB-C:COMPILE-IN-LEXENV (LAMBDA #1=(A B C) (DECLARE (TYPE # A))
> (DECLARE (TYPE # B)) (DECLARE (TYPE # C)) (DECLARE (IGNORABLE . #1#)) ...)
> #<NULL-LEXENV> NIL NIL NIL NIL NIL)
>  72: (COMPILE NIL (LAMBDA #1=(A B C) (DECLARE (TYPE # A)) (DECLARE (TYPE #
> B)) (DECLARE (TYPE # C)) (DECLARE (IGNORABLE . #1#)) ...))
>
>
> The error was:
>
> The value
>   3
> is not of type
>   LIST
> when binding SB-C::*CURRENT-PATH*
>    [Condition of type TYPE-ERROR]
>
>
> This thing is throwing up all sorts of errors, so I don't know how useful
> that is.  Another one:
>
> Backtrace:
>   0: ((FLET SB-C::MAYBE-REOPTIMIZE :IN
> SB-C::MAYBE-REOPTIMIZE-PREVIOUS-NODE) #<SB-C::COMBINATION :FUN #<SB-C::REF
>  :LEAF #<SB-C::CLAMBDA :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME # :KIND
> # :TYPE #<SB-KE..
>       Locals:
>         NODE = #<SB-C::COMBINATION :FUN #<SB-C::REF  :LEAF # {12053C4F53}>
> :ARGS (#) {12053C4FC3}>
>   1: (SB-C::MAYBE-REOPTIMIZE-PREVIOUS-NODE #<SB-C::CTRAN 1 {12053C3CA3}>
> #<SB-C::CBLOCK NIL :START c1 {12053C3DA3}>)
>   2: (SB-C::UNLINK-NODE #<SB-C::CRETURN :LAMBDA #<SB-C::CLAMBDA
> :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME (LET #) :KIND (NIL) :TYPE
> #<SB-KERNEL:BUILT-IN-CLASSOID FUNCTION (read-only)> :WHERE-FROM :DEFIN..
>   3: (SB-C::MOVE-RETURN-USES #<SB-C::CLAMBDA :%SOURCE-NAME
> SB-C::.ANONYMOUS. :%DEBUG-NAME (LET (#1=#:N-LEN57)) :KIND (NIL) :TYPE
> #<SB-KERNEL:BUILT-IN-CLASSOID FUNCTION (read-only)> :WHERE-FROM :DEFINED
> :VA..
>   4: (SB-C::MOVE-RETURN-STUFF #<SB-C::CLAMBDA :%SOURCE-NAME
> SB-C::.ANONYMOUS. :%DEBUG-NAME (LET (#1=#:N-LEN57)) :KIND (NIL) :TYPE
> #<SB-KERNEL:BUILT-IN-CLASSOID FUNCTION (read-only)> :WHERE-FROM :DEFINED
> :V..
>   5: (SB-C::LET-CONVERT #<SB-C::CLAMBDA :%SOURCE-NAME SB-C::.ANONYMOUS.
> :%DEBUG-NAME (LET (#1=#:N-LEN57)) :KIND (NIL) :TYPE
> #<SB-KERNEL:BUILT-IN-CLASSOID FUNCTION (read-only)> :WHERE-FROM :DEFINED
> :VARS (#..
>   6: (SB-C::MAYBE-LET-CONVERT #<SB-C::CLAMBDA :%SOURCE-NAME
> SB-C::.ANONYMOUS. :%DEBUG-NAME (LET (#1=#:N-LEN57)) :KIND (NIL) :TYPE
> #<SB-KERNEL:BUILT-IN-CLASSOID FUNCTION (read-only)> :WHERE-FROM :DEFINED
> :V..
>   7: (SB-C::LOCALL-ANALYZE-COMPONENT #<SB-C:COMPONENT :NAME "<unknown>"
> :REANALYZE T {120533B203}>)
>   8: (SB-C::TRANSFORM-CALL #<SB-C::COMBINATION :FUN #<SB-C::REF  :LEAF
> #<SB-C::CLAMBDA :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME # :KIND #
> :TYPE #<SB-KERNEL:BUILT-IN-CLASSOID FUNCTION (read-only)> :WHER..
>   9: (SB-C::IR1-OPTIMIZE-COMBINATION #<SB-C::COMBINATION :FUN #<SB-C::REF
>  :LEAF #<SB-C::CLAMBDA :%SOURCE-NAME SB-C::.ANONYMOUS. :%DEBUG-NAME # :KIND
> # :TYPE #<SB-KERNEL:BUILT-IN-CLASSOID FUNCTION (read-on..
>  10: (SB-C::IR1-OPTIMIZE #<SB-C:COMPONENT :NAME "<unknown>" :REANALYZE T
> {120533B203}> NIL)
>  11: (SB-C::IR1-OPTIMIZE-UNTIL-DONE #<SB-C:COMPONENT :NAME "<unknown>"
> :REANALYZE T {120533B203}>)
>  12: (SB-C::IR1-OPTIMIZE-PHASE-1 #<SB-C:COMPONENT :NAME "<unknown>"
> :REANALYZE T {120533B203}>)
>  13: (SB-C::IR1-PHASES #<SB-C:COMPONENT :NAME "<unknown>" :REANALYZE T
> {120533B203}>)
>  14: (SB-C::COMPILE-COMPONENT #<SB-C:COMPONENT :NAME "<unknown>"
> :REANALYZE T {120533B203}>)
>  15: (SB-C::%COMPILE (LAMBDA #1=(A B C) (DECLARE (TYPE # A)) (DECLARE
> (TYPE # B)) (DECLARE (TYPE # C)) (DECLARE (IGNORABLE . #1#)) ...) NIL NIL)
>  16: ((LAMBDA NIL :IN SB-C:COMPILE-IN-LEXENV))
>  17: ((FLET SB-C::WITH-IT :IN SB-C::%WITH-COMPILATION-UNIT))
>  18: (SB-C:COMPILE-IN-LEXENV (LAMBDA #1=(A B C) (DECLARE (TYPE # A))
> (DECLARE (TYPE # B)) (DECLARE (TYPE # C)) (DECLARE (IGNORABLE . #1#)) ...)
> #<NULL-LEXENV> NIL NIL NIL NIL NIL)
>  19: (COMPILE NIL (LAMBDA #1=(A B C) (DECLARE (TYPE # A)) (DECLARE (TYPE #
> B)) (DECLARE (TYPE # C)) (DECLARE (IGNORABLE . #1#)) ...))
>
> The error in this case was
>
> Unhandled memory fault at #x6.
>
> On Fri, Nov 28, 2025 at 7:39 PM Stas Boukarev <[email protected]> wrote:
>
>> Can you get a backtrace?
>>
>> On Sat, Nov 29, 2025 at 3:36 AM Paul Dietz <[email protected]>
>> wrote:
>> >
>> > I'm seeing quite a few failures in random testing.  The failures do not
>> reproduce or minimize and appear to be due to memory corruption.  Sometimes
>> they drop out into the low level debugger.  This is in version
>> "2.5.10.157-6d2ffcff0" on x86-64.
>> >
>> > I'll try to bisect to see where this started.
>> >
>> > Paul Dietz
>> >
>> > _______________________________________________
>> > Sbcl-devel mailing list
>> > [email protected]
>> > https://lists.sourceforge.net/lists/listinfo/sbcl-devel
>>
>

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