(MAKE-FOO)
the program loops endlessly instead of printing the object.
+If you run into a signal related bug, you are getting fatal errors
+such as 'signal N is [un]blocked' or just hangs, and you want to send
+a useful bug report then:
+
+- compile sbcl with ldb support (feature :sb-ldb, see
+ base-target-features.lisp-expr) and change '#define QSHOW_SIGNAL 0'
+ to '#define QSHOW_SIGNAL 1' in src/runtime/runtime.h.
+
+- isolate a smallish test case, run it
+
+- if it just hangs kill it with sigabrt: kill -ABRT <pidof sbcl>
+
+- print the backtrace from ldb by typing 'ba'
+
+- attach gdb: gdb -p <pidof sbcl> and get backtraces for all threads:
+ thread apply all ba
+
+- if multiple threads are in play then still in gdb, try to get Lisp
+ backtrace for all threads: 'thread apply all
+ call_backtrace_from_fp($ebp, 100)'. Substitute $ebp with $rbp on
+ x86-64.
+
+- send a report with the backtraces and the output (both stdout,
+ stderr) produced by sbcl
+
+- don't forget to include OS and SBCL version
+
+- if available include info on outcome of the same test with other
+ versions of SBCL, OS, ...
+
NOTES:
Such code should compile without complaint and work correctly either
on SBCL or on any other completely compliant Common Lisp system.
- b: &AUX argument in a boa-constructor without a default value means
- "do not initilize this slot" and does not cause type error. But
- an error may be signalled at read time and it would be good if
- SBCL did it.
-
- d: (fixed in 0.8.1.5)
-
33:
And as long as we're wishing, it would be awfully nice if INSPECT could
also report on closures, telling about the values of the bound variables.
forever, even when it is uninterned and all other references to it
are lost.
-143:
- (reported by Jesse Bouwman 2001-10-24 through the unfortunately
- prominent SourceForge web/db bug tracking system, which is
- unfortunately not a reliable way to get a timely response from
- the SBCL maintainers)
- In the course of trying to build a test case for an
- application error, I encountered this behavior:
- If you start up sbcl, and then lay on CTRL-C for a
- minute or two, the lisp process will eventually say:
- %PRIMITIVE HALT called; the party is over.
- and throw you into the monitor. If I start up lisp,
- attach to the process with strace, and then do the same
- (abusive) thing, I get instead:
- access failure in heap page not marked as write-protected
- and the monitor again. I don't know enough to have the
- faintest idea of what is going on here.
- This is with sbcl 6.12, uname -a reports:
- Linux prep 2.2.19 #4 SMP Tue Apr 24 13:59:52 CDT 2001 i686 unknown
- I (WHN) have verified that the same thing occurs on sbcl-0.pre7.141
- under OpenBSD 2.9 on my X86 laptop. Do be patient when you try it:
- it took more than two minutes (but less than five) for me.
-
145:
a.
ANSI allows types `(COMPLEX ,FOO) to use very hairy values for
isn't too surprising since there are many differences in stack
implementation and GC conservatism between the X86 and other ports.)
+ (Can't reproduce on x86 linux as of 1.0.20.23 - MGL)
+
This is probably the same bug as 216
173:
c. (fixed in 0.8.4.23)
-201: "Incautious type inference from compound types"
- a. (reported by APD sbcl-devel 2002-09-17)
- (DEFUN FOO (X)
- (LET ((Y (CAR (THE (CONS INTEGER *) X))))
- (SETF (CAR X) NIL)
- (FORMAT NIL "~S IS ~S, Y = ~S"
- (CAR X)
- (TYPECASE (CAR X)
- (INTEGER 'INTEGER)
- (T '(NOT INTEGER)))
- Y)))
-
- (FOO ' (1 . 2)) => "NIL IS INTEGER, Y = 1"
-
- b.
- * (defun foo (x)
- (declare (type (array * (4 4)) x))
- (let ((y x))
- (setq x (make-array '(4 4)))
- (adjust-array y '(3 5))
- (= (array-dimension y 0) (eval `(array-dimension ,y 0)))))
- FOO
- * (foo (make-array '(4 4) :adjustable t))
- NIL
-
205: "environment issues in cross compiler"
(These bugs have no impact on user code, but should be fixed or
documented.)
c. The cross-compiler cannot inline functions defined in a non-null
lexical environment.
-206: ":SB-FLUID feature broken"
- (reported by Antonio Martinez-Shotton sbcl-devel 2002-10-07)
- Enabling :SB-FLUID in the target-features list in sbcl-0.7.8 breaks
- the build.
-
207: "poorly distributed SXHASH results for compound data"
SBCL's SXHASH could probably try a little harder. ANSI: "the
intent is that an implementation should make a good-faith
can erroneously return T.
215: ":TEST-NOT handling by functions"
- a. FIND and POSITION currently signal errors when given non-NIL for
- both their :TEST and (deprecated) :TEST-NOT arguments, but by
- ANSI 17.2 "the consequences are unspecified", which by ANSI 1.4.2
- means that the effect is "unpredictable but harmless". It's not
- clear what that actually means; it may preclude conforming
- implementations from signalling errors.
- b. COUNT, REMOVE and the like give priority to a :TEST-NOT argument
- when conflict occurs. As a quality of implementation issue, it
- might be preferable to treat :TEST and :TEST-NOT as being in some
- sense the same &KEY, and effectively take the first test function in
- the argument list.
- c. Again, a quality of implementation issue: it would be good to issue a
- STYLE-WARNING at compile-time for calls with :TEST-NOT, and a
- WARNING for calls with both :TEST and :TEST-NOT; possibly this
- latter should be WARNed about at execute-time too.
+
+ We should verify that our handling of :TEST-NOT and :TEST is consistent
+ for all functions that accept them: that is, signal an error if both
+ are specified.
+
+ Similarly, a compile-time full warning for calls with both would be good.
+
+ We might also consider a compile-time style warning for :TEST-NOT.
216: "debugger confused by frames with invalid number of arguments"
In sbcl-0.7.8.51, executing e.g. (VECTOR-PUSH-EXTEND T), BACKTRACE, Q
the bad VECTOR-PUSH-EXTEND frame causes GC problems, though that may
not be the actual problem. (CMU CL 18c doesn't have problems with this.)
- This is probably the same bug as 162
-
-235: "type system and inline expansion"
- a.
- (declaim (ftype (function (cons) number) acc))
- (declaim (inline acc))
- (defun acc (c)
- (the number (car c)))
+ (Can't reproduce on x86 linux as of 1.0.20.22 - MGL)
- (defun foo (x y)
- (values (locally (declare (optimize (safety 0)))
- (acc x))
- (locally (declare (optimize (safety 3)))
- (acc y))))
-
- (foo '(nil) '(t)) => NIL, T.
-
- As of 0.9.15.41 this seems to be due to ACC being inlined only once
- inside FOO, which results in the second call reusing the FUNCTIONAL
- resulting from the first -- which doesn't check the type.
+ This is probably the same bug as 162
237: "Environment arguments to type functions"
a. Functions SUBTYPEP, TYPEP, UPGRADED-ARRAY-ELEMENT-TYPE, and
calls of the form (TYPEP 1 'INTEGER NIL), even though this is
just as optimizeable as (TYPEP 1 'INTEGER).
-238: "REPL compiler overenthusiasm for CLOS code"
- From the REPL,
- * (defclass foo () ())
- * (defmethod bar ((x foo) (foo foo)) (call-next-method))
- causes approximately 100 lines of code deletion notes. Some
- discussion on this issue happened under the title 'Three "interesting"
- bugs in PCL', resulting in a fix for this oververbosity from the
- compiler proper; however, the problem persists in the interactor
- because the notion of original source is not preserved: for the
- compiler, the original source of the above expression is (DEFMETHOD
- BAR ((X FOO) (FOO FOO)) (CALL-NEXT-METHOD)), while by the time the
- compiler gets its hands on the code needing compilation from the REPL,
- it has been macroexpanded several times.
-
- A symptom of the same underlying problem, reported by Tony Martinez:
- * (handler-case
- (with-input-from-string (*query-io* " no")
- (yes-or-no-p))
- (simple-type-error () 'error))
- ; in: LAMBDA NIL
- ; (SB-KERNEL:FLOAT-WAIT)
- ;
- ; note: deleting unreachable code
- ; compilation unit finished
- ; printed 1 note
-
242: "WRITE-SEQUENCE suboptimality"
(observed from clx performance)
In sbcl-0.7.13, WRITE-SEQUENCE of a sequence of type
(fixed in 0.8.2.51, but a test case would be good)
-276:
- b. The same as in a., but using MULTIPLE-VALUE-SETQ instead of SETQ.
- c. (defvar *faa*)
- (defmethod faa ((*faa* double-float))
- (set '*faa* (when (< *faa* 0) (- *faa*)))
- (1+ *faa*))
- (faa 1d0) => type error
-
279: type propagation error -- correctly inferred type goes astray?
In sbcl-0.8.3 and sbcl-0.8.1.47, the warning
The binding of ABS-FOO is a (VALUES (INTEGER 0 0)
(open "/dev/zero" :element-type '(unsigned-byte 1025))
gives an error in sbcl-0.8.10.
-325: "CLOSE :ABORT T on supeseding streams"
+325: "CLOSE :ABORT T on superseding streams"
Closing a stream opened with :IF-EXISTS :SUPERSEDE with :ABORT T leaves no
file on disk, even if one existed before opening.
in the wrapper, and then to update the instance just run through
all the old wrappers in order from oldest to newest.
-332: "fasl stack inconsistency in structure redefinition"
- (reported by Tim Daly Jr sbcl-devel 2004-05-06)
- Even though structure redefinition is undefined by the standard, the
- following behaviour is suboptimal: running
- (defun stimulate-sbcl ()
- (let ((filename (format nil "/tmp/~A.lisp" (gensym))))
- ;;create a file which redefines a structure incompatibly
- (with-open-file (f filename :direction :output :if-exists :supersede)
- (print '(defstruct astruct foo) f)
- (print '(defstruct astruct foo bar) f))
- ;;compile and load the file, then invoke the continue restart on
- ;;the structure redefinition error
- (handler-bind ((error (lambda (c) (continue c))))
- (load (compile-file filename)))))
- (stimulate-sbcl)
- and choosing the CONTINUE restart yields the message
- debugger invoked on a SB-INT:BUG in thread 27726:
- fasl stack not empty when it should be
-
336: "slot-definitions must retain the generic functions of accessors"
reported by Tony Martinez:
(defclass foo () ((bar :reader foo-bar)))
conditionalization and OAOOMization: refactoring the common parts would
be good.
-354: XEPs in backtraces
- Under default compilation policy
- (defun test ()
- (throw :unknown t))
- (test)
- Has the XEP for TEST in the backtrace, not the TEST frame itself.
- (sparc and x86 at least)
-
- Since SBCL 0.8.20.1 this is hidden unless *SHOW-ENTRY-POINT-DETAILS*
- is true (instead there appear two TEST frames at least on ppc). The
- underlying cause seems to be that SB-C::TAIL-ANNOTATE will not merge
- the tail-call for the XEP, since Python has by that time proved that
- the function can never return; same happens if the function holds an
- unconditional call to ERROR.
-
356: PCL corruption
(reported by Bruno Haible)
After the "layout depth conflict" error, the CLOS is left in a state where
(make-instance 'bar)
]
-357: defstruct inheritance of initforms
- (reported by Bruno Haible)
- When defstruct and defclass (with :metaclass structure-class) are mixed,
- 1. some slot initforms are ignored by the DEFSTRUCT generated constructor
- function, and
- 2. all slot initforms are ignored by MAKE-INSTANCE. (This can be arguably
- OK for initforms that were given in a DEFSTRUCT form, but for those
- given in a DEFCLASS form, I think it qualifies as a bug.)
- Test case:
- (defstruct structure02a
- slot1
- (slot2 t)
- (slot3 (floor pi)))
- (defclass structure02b (structure02a)
- ((slot4 :initform -44)
- (slot5)
- (slot6 :initform t)
- (slot7 :initform (floor (* pi pi)))
- (slot8 :initform 88))
- (:metaclass structure-class))
- (defstruct (structure02c (:include structure02b (slot8 -88)))
- slot9
- (slot10 t)
- (slot11 (floor (exp 3))))
- ;; 1. Form:
- (let ((a (make-structure02c)))
- (list (structure02c-slot4 a)
- (structure02c-slot5 a)
- (structure02c-slot6 a)
- (structure02c-slot7 a)))
- Expected: (-44 nil t 9)
- Got: (SB-PCL::..SLOT-UNBOUND.. SB-PCL::..SLOT-UNBOUND..
- SB-PCL::..SLOT-UNBOUND.. SB-PCL::..SLOT-UNBOUND..)
- ;; 2. Form:
- (let ((b (make-instance 'structure02c)))
- (list (structure02c-slot2 b)
- (structure02c-slot3 b)
- (structure02c-slot4 b)
- (structure02c-slot6 b)
- (structure02c-slot7 b)
- (structure02c-slot8 b)
- (structure02c-slot10 b)
- (structure02c-slot11 b)))
- Expected: (t 3 -44 t 9 -88 t 20)
- Got: (0 0 0 0 0 0 0 0)
-
359: wrong default value for ensure-generic-function's :generic-function-class argument
(reported by Bruno Haible)
ANSI CL is silent on this, but the MOP's specification of ENSURE-GENERIC-FUNCTION says:
Expected: ERROR
Got: #<SB-MOP:STANDARD-DIRECT-SLOT-DEFINITION FOO>
-369: unlike-an-intersection behavior of VALUES-TYPE-INTERSECTION
- In sbcl-0.8.18.2, the identity $(x \cap y \cap y)=(x \cap y)$
- does not hold for VALUES-TYPE-INTERSECTION, even for types which
- can be intersected exactly, so that ASSERTs fail in this test case:
- (in-package :cl-user)
- (let ((types (mapcar #'sb-c::values-specifier-type
- '((values (vector package) &optional)
- (values (vector package) &rest t)
- (values (vector hash-table) &rest t)
- (values (vector hash-table) &optional)
- (values t &optional)
- (values t &rest t)
- (values nil &optional)
- (values nil &rest t)
- (values sequence &optional)
- (values sequence &rest t)
- (values list &optional)
- (values list &rest t)))))
- (dolist (x types)
- (dolist (y types)
- (let ((i (sb-c::values-type-intersection x y)))
- (assert (sb-c::type= i (sb-c::values-type-intersection i x)))
- (assert (sb-c::type= i (sb-c::values-type-intersection i y)))))))
-
370: reader misbehaviour on large-exponent floats
(read-from-string "1.0s1000000000000000000000000000000000000000")
causes the reader to attempt to create a very large bignum (which it
379: TRACE :ENCAPSULATE NIL broken on ppc/darwin
See commented-out test-case in debug.impure.lisp.
-380: Accessor redefinition fails because of old accessor name
- When redefining an accessor, SB-PCL::FIX-SLOT-ACCESSORS may try to
- find the generic function named by the old accessor name using
- ENSURE-GENERIC-FUNCTION and then remove the old accessor's method in
- the GF. If the old name does not name a function, or if the old name
- does not name a generic function, no attempt to find the GF or remove
- any methods is made.
-
- However, if an unrelated GF with an incompatible lambda list exists,
- the class redefinition will fail when SB-PCL::REMOVE-READER-METHOD
- tries to find and remove a method with an incompatible lambda list
- from the unrelated generic function.
-
382: externalization unexpectedly changes array simplicity
COMPILE-FILE and LOAD
(defun foo ()
385:
(format nil "~4,1F" 0.001) => "0.00" (should be " 0.0");
(format nil "~4,1@F" 0.001) => "+.00" (should be "+0.0").
+ (format nil "~E" 0.01) => "10.e-3" (should be "1.e-2");
+ (format nil "~G" 0.01) => "10.e-3" (should be "1.e-2");
386: SunOS/x86 stack exhaustion handling broken
According to <http://alfa.s145.xrea.com/sbcl/solaris-x86.html>, the
(FOO 1 2)
gives NO-APPLICABLE-METHOD rather than an argument count error.
-395: Unicode and streams
- One of the remaining problems in SBCL's Unicode support is the lack
- of generality in certain streams.
- a. FILL-POINTER-STREAMs: SBCL refuses to write (e.g. using FORMAT)
- to streams made from strings that aren't character strings with
- fill-pointers:
- (let ((v (make-array 5 :fill-pointer 0 :element-type 'standard-char)))
- (format v "foo")
- v)
- should return a non-simple base string containing "foo" but
- instead errors.
-
- (reported on sbcl-help by "tichy")
-
396: block-compilation bug
(let ((x 1))
(dotimes (y 10)
perhaps because CLISP has shuffled the clauses into an
ANSI-compliant order before proceeding.
-405: a TYPE-ERROR in MERGE-LETS exercised at DEBUG 3
- In sbcl-0.9.16.21 on linux/86, compiling
- (declaim (optimize (debug 3)))
- (defstruct foo bar)
- (let ()
- (flet ((i (x) (frob x (foo-bar foo))))
- (i :five)))
- causes a TYPE-ERROR
- The value NIL is not of type SB-C::PHYSENV.
- in MERGE-LETS.
-
406: functional has external references -- failed aver
Given the following food in a single file
(eval-when (:compile-toplevel :load-toplevel :execute)
implementation of read circularity, using a symbol as a marker for
the previously-referenced object.
-415: Issues creating large arrays on x86-64/Linux and x86/Darwin
-
- (make-array (1- array-dimension-limit))
-
- causes a GC invariant violation on x86-64/Linux, and
- an unhandled SIGILL on x86/Darwin.
-
416: backtrace confusion
(defun foo (x)
419: stack-allocated indirect closure variables are not popped
- (locally (declare (optimize speed (safety 0)))
(defun bug419 (x)
(multiple-value-call #'list
(eval '(values 1 2 3))
(let ((x x))
- (declare (dynamic-extent x))
+ (declare (sb-int:truly-dynamic-extent x))
(flet ((mget (y)
(+ x y))
(mset (z)
(incf x z)))
(declare (dynamic-extent #'mget #'mset))
- ((lambda (f g) (eval `(progn ,f ,g (values 4 5 6)))) #'mget #'mset))))))
-
- (ASSERT (EQUAL (BUG419) '(1 2 3 4 5 6))) => failure
-
-420: The MISC.556 test from gcl/ansi-tests/misc.lsp fails hard.
-
-In sbcl-1.0.13 on Linux/x86, executing
- (FUNCALL
- (COMPILE NIL
- '(LAMBDA (P1 P2)
- (DECLARE
- (OPTIMIZE (SPEED 1) (SAFETY 0) (DEBUG 0) (SPACE 0))
- (TYPE (MEMBER 8174.8604) P1) (TYPE (MEMBER -95195347) P2))
- (FLOOR P1 P2)))
- 8174.8604 -95195347)
-interactively causes
- SB-SYS:MEMORY-FAULT-ERROR: Unhandled memory fault at #x8.
-The gcl/ansi-tests/doit.lisp program terminates prematurely shortly after
-MISC.556 by falling into gdb with
- fatal error encountered in SBCL pid 2827: Unhandled SIGILL
-unless the MISC.556 test is commented out.
-
-Analysis: + and a number of other arithmetic functions exhibit the
-same behaviour. Here's the underlying problem: On x86 we perform
-single-float + integer normally using double-precision, and then
-coerce the result back to single-float. (The FILD instruction always
-gives us a double-float, and unless we do MOVE-FROM-SINGLE it remains
-one. Or so it seems to me, and that would also explain the observed
-behaviour below.)
-
-During IR1 we derive the types for both
-
- (+ <single> <integer>) ; uses double-precision
- (+ <single> (FLOAT <integer> <single>)) ; uses single-precision
-
-and get a mismatch for a number of unlucky arguments. This leads to
-derived result type NIL, and ends up flushing the whole whole
-operation -- and finally we generate code without a return sequence,
-and fall through to whatever.
-
-The use of double-precision in the first case appears to be an
-(un)happy accident -- interval arithmetic gives us the
-double-precision result because that's what the backend does.
-
- (+ 8172.0 (coerce -95195347 'single-float)) ; => -9.518717e7
- (+ 8172.0 -95195347) ; => -9.5187176e7
- (coerce (+ 8172.0 (coerce -95195347 'double-float)) 'single-float)
- ; => -9.5187176e7
-
-Which should be fixed, the IR1, or the backend?
+ ((lambda (f g) (eval `(progn ,f ,g (values 4 5 6)))) #'mget #'mset)))))
+
+ (ASSERT (EQUAL (BUG419 42) '(1 2 3 4 5 6))) => failure
+
+ Note: as of SBCL 1.0.16.29 this bug no longer affects user code, as
+ SB-INT:TRULY-DYNAMIC-EXTENT needs to be used instead of
+ DYNAMIC-EXTENT for this to happen. Proper fix for this bug requires
+ (Nikodemus thinks) storing the relevant LAMBDA-VARs in a
+ :DYNAMIC-EXTENT cleanup, and teaching stack analysis how to deal
+ with them.
421: READ-CHAR-NO-HANG misbehaviour on Windows Console:
(Test-case adapted from CL-PPCRE.)
-425: reading from closed streams
-
- Reported by Damien Cassou on sbcl-devel. REPL transcript follows:
-
- * (open ".bashrc" :direction :input)
- #<SB-SYS:FD-STREAM for "file /home/cassou/.bashrc" {A6ADFC9}>
- * (defparameter *s* *)
- *S*
- * (read-line *s*)
- "# -*- Mode: Sh -*-"
- * (read-line *s*)
- "# Files you make look like rw-r--r--"
- * (open-stream-p *s*)
- T
- * (close *s*)
- T
- * (open-stream-p *s*)
- NIL
- * (read-line *s*)
- "umask 022"
-
- The problem is with the fast path using ansi-stream-cin-buffer not hitting
- closed-flame.
-
-426: inlining failure involving multiple nested calls
-
- (declaim (inline foo))
- (defun foo (x y)
- (cons x y))
- (defun bar (x)
- (foo (foo x x) (foo x x)))
- ;; shows a full call to FOO
- (disassemble 'bar)
- ;; simple way to test this programmatically
- (let ((code (sb-c::fun-code-header #'bar))
- (foo (sb-impl::fdefinition-object 'foo nil)))
- (loop for i from sb-vm:code-constants-offset below (sb-kernel:get-header-data code)
- do (assert (not (eq foo (sb-kernel:code-header-ref code i))))))
-
- This appears to be an ancient bug, inherited from CMUCL: reportedly
- 18c does the same thing. RECOGNIZE-KNOWN-CALL correctly picks up only
- one of the calls, but local call analysis fails to inline the call
- for the second time. Nikodemus thinks (but is not 100% sure based on
- very brief investigation) that the call that is not inlined is the
- second nested one. A trivial fix is to call CHANGE-REF-LEAF in known
- call for functions already inline converted there, but he is not sure
- if this has adverse effects elsewhere.
+428: TIMER SCHEDULE-STRESS and PARALLEL-UNSCHEDULE in
+ timer.impure.lisp fails
+
+ Failure modes vary. Core problem seems to be (?) recursive entry to
+ RUN-EXPIRED-TIMERS.
+
+429: compiler hangs
+
+ Compiling a file with this contents makes the compiler loop in
+ ORDER-UVL-SETS:
+
+ (declaim (inline storage))
+ (defun storage (x)
+ (the (simple-array flt (*)) (unknown x)))
+
+ (defun test1 (lumps &key cg)
+ (let ((nodes (map 'list (lambda (lump) (storage lump))
+ lumps)))
+ (setf (aref nodes 0) 2)
+ (assert (every #'~= (apply #'concatenate 'list nodes) '(2 3 6 9)))))
+
+431: alien strucure redefinition doesn't work as expected
+ fixed in 1.0.21.29
projects / sbcl.git / blobdiff