Re: sqr() bug and acos bug.

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

>No, that would be horrible.  (There ain't no zero divisors in fields
>or integral domains...)
Well, there is four square roots in Z/2^nZ if n>2 , and of course
only two in the 2-adic ring.
---

I have written a function (in C) which generate absolutely random GEN, to 
test GP.
Frow now on, it has found two bugs:
? exp("eee")  
CRASH...
? 2+[;] 
 ***   forbidden addition  ***   segmentation fault: bug in GP (please report).

Here a patch (I have also updated the CVS version)

Index: src/basemath/alglin1.c
===================================================================
RCS file: /home/megrez/cvsroot/pari/src/basemath/alglin1.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 alglin1.c
--- src/basemath/alglin1.c	1999/09/16 13:47:15	1.1.1.1
+++ src/basemath/alglin1.c	1999/10/31 17:04:45
@@ -643,7 +643,7 @@
   long ly,dy,i,j;
   GEN z;
 
-  ly=lg(y); if (ly==1) err(gadderf,"Scalar","t_MAT");
+  ly=lg(y); if (ly==1) err(gadderf,typ(x),t_MAT);
   dy=lg(y[1]);
   if (typ(y)!=t_MAT || ly!=dy) err(mattype1,"gaddmat");
   z=cgetg(ly,t_MAT);
Index: src/basemath/trans1.c
===================================================================
RCS file: /home/megrez/cvsroot/pari/src/basemath/trans1.c,v
retrieving revision 1.6
diff -u -r1.6 trans1.c
--- src/basemath/trans1.c	1999/10/30 18:12:54	1.6
+++ src/basemath/trans1.c	1999/10/31 17:04:45
@@ -177,6 +177,8 @@
 
     case t_QFR: case t_QFI:
       err(talker,"quadratic forms cannot be used in transcendental functions");
+  default:
+    err(typeer,"a transcendental function");
   }
   return f(x,prec);
 }