X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=BUGS;h=bba6c83e684dddc234652ac2f544d3ca677d68d4;hb=94ac5b7c3ff37850210b6fc9a7593cf1c5752993;hp=cd8dc4087a117a693e528bd18568330409d14cab;hpb=69cd16d7335a7f66985752b84f78d18e45f9783e;p=sbcl.git

diff --git a/BUGS b/BUGS
index cd8dc40..bba6c83 100644
--- a/BUGS
+++ b/BUGS
@@ -972,18 +972,36 @@ WORKAROUND:
       (let ((x (1+ x)))
         (call-next-method)))
   Now (FOO 3) should return 3, but instead it returns 4.
-    
-137:
-  (SB-DEBUG:BACKTRACE) output should start with something
-  including the name BACKTRACE, not (as in 0.pre7.88)
-  just "0: (\"hairy arg processor\" ...)". Until about
-  sbcl-0.pre7.109, the names in BACKTRACE were all screwed
-  up compared to the nice useful names in sbcl-0.6.13.
-  Around sbcl-0.pre7.109, they were mostly fixed by using
-  NAMED-LAMBDA to implement DEFUN. However, there are still
-  some screwups left, e.g. as of sbcl-0.pre7.109, there are
-  still some functions named "hairy arg processor" and
-  "SB-INT:&MORE processor".
+
+140:
+  (reported by Alexey Dejneka sbcl-devel 2002-01-03)
+
+  SUBTYPEP does not work well with redefined classes:
+  ---
+  * (defclass a () ())
+  #<STANDARD-CLASS A>
+  * (defclass b () ())
+  #<STANDARD-CLASS B>
+  * (subtypep 'b 'a)
+  NIL
+  T
+  * (defclass b (a) ())
+  #<STANDARD-CLASS B>
+  * (subtypep 'b 'a)
+  T
+  T
+  * (defclass b () ())
+  #<STANDARD-CLASS B>
+   
+  ;;; And now...
+  * (subtypep 'b 'a)
+  T
+  T
+
+  This bug was fixed in sbcl-0.7.4.1 by invalidating the PCL wrapper
+  class upon redefinition. Unfortunately, doing so causes bug #176 to
+  appear.  Pending further investication, one or other of these bugs
+  might be present at any given time.
 
 141: 
   Pretty-printing nested backquotes doesn't work right, as 
@@ -1288,6 +1306,8 @@ WORKAROUND:
     (defclass c0 (b) ())
     (make-instance 'c19)
 
+  See also bug #140.
+
 178: "AVER failure compiling confused THEs in FUNCALL"
   In sbcl-0.7.4.24, compiling
     (defun bug178 (x)
@@ -1299,8 +1319,48 @@ WORKAROUND:
     (defun bug178alternative (x)
       (funcall (the nil x)))
 
-179:
-  (fixed in sbcl-0.7.4.28)
+181: "bad type specifier drops compiler into debugger"
+  Compiling 
+    (in-package :cl-user)
+    (defun bar (x)
+      (declare (type 0 x))
+      (cons x x))
+  signals 
+    bad thing to be a type specifier: 0
+  which seems fine, but also enters the debugger (instead of having
+  the compiler handle the error, convert it into a COMPILER-ERROR, and
+  continue compiling) which seems wrong.
+
+182: "SPARC/Linux floating point"
+  Evaluating (/ 1.0 0.0) at the prompt causes a Bus error and complete
+  death of the environment. Other floating point operations sometimes
+  return infinities when they should raise traps (e.g. the test case
+  for bug #146, (expt 2.0 12777)).
+
+183: "IEEE floating point issues"
+  Even where floating point handling is being dealt with relatively
+  well (as of sbcl-0.7.5, on sparc/sunos and alpha; see bug #146), the
+  accrued-exceptions and current-exceptions part of the fp control
+  word don't seem to bear much relation to reality. E.g. on
+  SPARC/SunOS:
+  * (/ 1.0 0.0)
+
+  debugger invoked on condition of type DIVISION-BY-ZERO:
+    arithmetic error DIVISION-BY-ZERO signalled
+  0] (sb-vm::get-floating-point-modes)
+
+  (:TRAPS (:OVERFLOW :INVALID :DIVIDE-BY-ZERO)
+          :ROUNDING-MODE :NEAREST
+          :CURRENT-EXCEPTIONS NIL
+          :ACCRUED-EXCEPTIONS (:INEXACT)
+          :FAST-MODE NIL)
+  0] abort
+  * (sb-vm::get-floating-point-modes)
+  (:TRAPS (:OVERFLOW :INVALID :DIVIDE-BY-ZERO)
+          :ROUNDING-MODE :NEAREST
+          :CURRENT-EXCEPTIONS (:INEXACT)
+          :ACCRUED-EXCEPTIONS (:INEXACT)
+          :FAST-MODE NIL)
 
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