[Bug c++/34086] New: g++ crashes on simple 20-line source file

[nmaquet at gmail dot com]

The following code crashes g++ 4.1.3 :


*START OF FILE**

#include 
using namespace std;

double arctan(double x)
{
   int i=1,n=20;
   double c=1.0,arct=0.0,paf=1.0,eps=0.1,hab;
   hab=(x/(1+x*x));
   do
   {
   arct+=paf;
   c+=2i/(2i+1);
   paf=(c*hab);
   i++;
   }
   while((ieps));
   arct*=hab;
   return arct;
}

int main()
{
   double Pi;
   Pi=4*(4*arctan(1/5)-arctan(1/239));
   cout< search starts here:
 /usr/include/c++/4.1.3
 /usr/include/c++/4.1.3/i486-linux-gnu
 /usr/include/c++/4.1.3/backward
 /usr/local/include
 /usr/lib/gcc/i486-linux-gnu/4.1.3/include
 /usr/include
End of search list.
GNU C++ version 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)
(i486-linux-gnu)
compiled by GNU C version 4.1.3 20070929 (prerelease) (Ubuntu
4.1.2-16ubuntu2).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 3cc47be363985179cfafdceddd0e8f5d
test.cpp: In function ‘double arctan(double)’:
test.cpp:12: internal compiler error: in const_binop, at fold-const.c:1641
Please submit a full bug report,
with preprocessed source if appropriate.
See http://gcc.gnu.org/bugs.html> for instructions.
For Debian GNU/Linux specific bug reporting instructions,
see .
Preprocessed source stored into /tmp/cczf63dY.out file, please attach this to
your bugreport.


-- 
   Summary: g++ crashes on simple 20-line source file
   Product: gcc
   Version: 4.1.3
Status: UNCONFIRMED
  Severity: normal
  Priority: P3
 Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: nmaquet at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34086

[Bug c++/34086] g++ crashes on simple 20-line source file

[nmaquet at gmail dot com]

--- Comment #1 from nmaquet at gmail dot com  2007-11-13 20:13 ---
Created an attachment (id=14547)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14547&action=view)
preprocessed source


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34086

[Bug c++/34086] g++ crashes on simple 20-line source file

[nmaquet at gmail dot com]

--- Comment #2 from nmaquet at gmail dot com  2007-11-13 20:16 ---
I reported this on Launchpad a few weeks ago but it doesn't get much attention
:

https://bugs.launchpad.net/ubuntu/+source/gcc-4.1/+bug/155259


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34086