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Subject: [Bug c++/50859] New: ICE when creating integral constant from real value in a template
Date: Mon, 24 Oct 2011 23:31:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D50859

             Bug #: 50859
           Summary: ICE when creating integral constant from real value in
                    a template
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: bitbucket@mailinator.com


$ curl 'http://169.254.169.254/latest/meta-data/ami-id' && echo
ami-21f53948
$ cat /etc/issue
Ubuntu 11.10 \n \l

$ uname -a
Linux domU-12-31-39-12-AC-DE 3.0.0-12-virtual #20-Ubuntu SMP Fri Oct 7 18:1=
9:02
UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
$ g++ --version
g++ (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ cat ice.cc=20
template <class T>
void f() {
  const int INTEGRAL_CONSTANT =3D 1.0;
}

$ g++ ice.cc
ice.cc: In function =E2=80=98void f()=E2=80=99:
ice.cc:3:33: internal compiler error: in fold_convert_const_int_from_real, =
at
fold-const.c:1562
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccRBRVx3.out file, please attach this =
to
your bugreport.
$ cat /tmp/ccRBRVx3.out
// /usr/lib/gcc/x86_64-linux-gnu/4.6.1/cc1plus -quiet -imultilib . -imultia=
rch
x86_64-linux-gnu -D_GNU_SOURCE ice.cc -quiet -dumpbase ice.cc -mtune=3Dgene=
ric
-march=3Dx86-64 -auxbase ice -fstack-protector -o - -frandom-seed=3D0
# 1 "ice.cc"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "ice.cc"
template <class T>
void f() {
  const int INTEGRAL_CONSTANT =3D 1.0;
}
$

This error does not appear in g++ 4.4.1