time trying to GC afterwards. Surely there's some more economical
way to implement (ROOM T).
-115:
- reported by Martin Atzmueller 2001-06-25; originally from CMU CL bugs
- collection:
- (in-package :cl-user)
- ;;; The following invokes a compiler error.
- (declaim (optimize (speed 2) (debug 3)))
- (defun tst ()
- (flet ((m1 ()
- (unwind-protect nil)))
- (if (catch nil)
- (m1)
- (m1))))
- The error message in sbcl-0.6.12.42 is
- internal error, failed AVER:
- "(COMMON-LISP:EQ (SB!C::TN-ENVIRONMENT SB!C:TN) SB!C::TN-ENV)"
-
- This examples better illustrates the problem:
-
- (defun tst ()
- (declare (optimize (speed 2) (debug 3)))
- (flet ((m1 ()
- (bar (if (foo) 1 2))
- (let ((x (foo)))
- (bar x (list x)))))
- (if (catch nil)
- (m1)
- (m1))))
-
- (X is allocated in the physical environment of M1; X is :WRITE in
- the call of LET [convert-to-global]; IF makes sure that a block
- exists in M1 before this call.)
-
- Because X is :DEBUG-ENVIRONMENT, it is :LIVE by default in all
- blocks in the environment, particularly it is :LIVE in the start of
- M1 (where it is not yet :WRITE) [setup-environment-tn-conflicts].
-
- Then :LIVE is propagated backwards, i.e. into the caller of M1
- where X does not exist [lifetime-flow-analysis].
-
- (CATCH NIL) causes all TNs to be saved; Python fails on saving
- non-existent variable; if it is replaced with (FOO), the problem
- appears when debugging TST: LIST-LOCALS says
-
- debugger invoked on condition of type SB-DI:UNKNOWN-DEBUG-VAR:
-
- #<SB-DI::COMPILED-DEBUG-VAR X 0
- {905FF7D}> is not in #<SB-DI::COMPILED-DEBUG-FUNCTION TST>.
-
- (in those old versions, in which debugger worked :-().
-
117:
When the compiler inline expands functions, it may be that different
kinds of return values are generated from different code branches.
(the LOCALY there is not a typo; any unknown function (e.g. FROB)
will do).
-226: "AVER failure in COMPILE-FILE of clocc-ansi-test/tests.lisp"
- (APD points out that this seems to be another symptom of bug #115.)
- sbcl-0.7.9.43 dies with failed AVER "(EQ (TN-PHYSENV TN) TN-ENV)" when
- trying to compile clocc-ansi-test/tests.lisp. sbcl-0.7.9.31 was able to
- to compile it. A smaller test case exhibiting the same problem is
- (declaim (optimize (speed 0) (safety 3) (debug 3)))
- (defun c-a-p ()
- (flet ((safe-format (stream string &rest r)
- (unless (ignore-errors (progn
- (apply #'format stream string r)
- t))
- (format stream "~&foo ~S" string))))
- (cond
- ((eq my-result :ERROR)
- (cond
- ((ignore-errors (typep condition result))
- (safe-format t "~&bar ~S" result))
- (t
- (safe-format t "~&baz ~S (~A) ~S" condition condition result)))))))
-
-227: "compiler bewilderment with adjustable vectors and COPY-SEQ"
- (fixed in sbcl-0.7.9.65)
-
228: "function-lambda-expression problems"
in sbcl-0.7.9.6x, from the REPL:
* (progn (declaim (inline foo)) (defun foo (x) x))
229:
(subtypep 'function '(function)) => nil, t.
+230:
+ (char= #\a "a") => nil.
+
+ DAA requires it to signal a type error.
+
+
DEFUNCT CATEGORIES OF BUGS
IR1-#:
These labels were used for bugs related to the old IR1 interpreter.
(unless (tn-global-conflicts tn)
(convert-to-global tn))
(add-global-conflict :read-only tn block ltn-num))
-
+
(setf (tn-local tn) block)
(setf (tn-local-number tn) ltn-num)
(setf (svref tns ltn-num) tn)
;;; local when we scan the block again.
;;;
;;; If there are conflicts, then we set LOCAL to one of the
-;;; conflicting blocks. This ensures that Local doesn't hold over
+;;; conflicting blocks. This ensures that LOCAL doesn't hold over
;;; BLOCK as its value, causing the subsequent reanalysis to think
;;; that the TN has already been seen in that block.
;;;
(defun convert-to-environment-tn (tn tn-physenv)
(declare (type tn tn) (type physenv tn-physenv))
(aver (member (tn-kind tn) '(:normal :debug-environment)))
- (when (eq (tn-kind tn) :debug-environment)
- (aver (eq (tn-physenv tn) tn-physenv))
- (let ((2env (physenv-info tn-physenv)))
- (setf (ir2-physenv-debug-live-tns 2env)
- (delete tn (ir2-physenv-debug-live-tns 2env)))))
+ (ecase (tn-kind tn)
+ (:debug-environment
+ (setq tn-physenv (tn-physenv tn))
+ (let* ((2env (physenv-info tn-physenv)))
+ (setf (ir2-physenv-debug-live-tns 2env)
+ (delete tn (ir2-physenv-debug-live-tns 2env)))))
+ (:normal
+ (setf (tn-local tn) nil)
+ (setf (tn-local-number tn) nil)))
(setup-environment-tn-conflicts *component-being-compiled* tn tn-physenv nil)
- (setf (tn-local tn) nil)
- (setf (tn-local-number tn) nil)
(setf (tn-kind tn) :environment)
(setf (tn-physenv tn) tn-physenv)
(push tn (ir2-physenv-live-tns (physenv-info tn-physenv)))
(local-tns (make-array local-tn-limit) :type local-tn-vector)
;; Bit-vectors used during lifetime analysis to keep track of
;; references to local TNs. When indexed by the LTN number, the
- ;; index for a TN is non-zero in Written if it is ever written in
- ;; the block, and in Live-Out if the first reference is a read.
+ ;; index for a TN is non-zero in WRITTEN if it is ever written in
+ ;; the block, and in LIVE-OUT if the first reference is a read.
(written (make-array local-tn-limit :element-type 'bit
:initial-element 0)
:type local-tn-bit-vector)
#'objs.stale?))
(call-next-method))
+;;; bugs 115, 226: compiler failure in lifetime analysis
+(defun bug115-1 ()
+ (declare (optimize (speed 2) (debug 3)))
+ (flet ((m1 ()
+ (unwind-protect nil)))
+ (if (catch nil)
+ (m1)
+ (m1))))
+
+(defun bug115-2 ()
+ (declare (optimize (speed 2) (debug 3)))
+ (flet ((m1 ()
+ (bar (if (foo) 1 2))
+ (let ((x (foo)))
+ (bar x (list x)))))
+ (if (catch nil)
+ (m1)
+ (m1))))
+
+(defun bug226 ()
+ (declare (optimize (speed 0) (safety 3) (debug 3)))
+ (flet ((safe-format (stream string &rest r)
+ (unless (ignore-errors (progn
+ (apply #'format stream string r)
+ t))
+ (format stream "~&foo ~S" string))))
+ (cond
+ ((eq my-result :ERROR)
+ (cond
+ ((ignore-errors (typep condition result))
+ (safe-format t "~&bar ~S" result))
+ (t
+ (safe-format t "~&baz ~S (~A) ~S" condition condition result)))))))
+
(sb-ext:quit :unix-status 104) ; success
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