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Subject: [Bug fortran/48360] New: ICE on array assignment statement with allocatable LHS
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D48360

           Summary: ICE on array assignment statement with allocatable LHS
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: krefson@googlemail.com


Created attachment 23816
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=3D23816
Fortran 95 source which gives ICE on compilation attempt.

The attached code gives an ICE when compiled with gfortran 4.6.0=20

$ gfortran -v
Using built-in specs.
COLLECT_GCC=3Dgfortran
COLLECT_LTO_WRAPPER=3D/usr/local/gcc-4.6/libexec/gcc/x86_64-unknown-linux-g=
nu/4.6.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.6-source/gcc-4.6-20110312/configure
--enable-languages=3Dc,c++,fortran --enable-checking=3Drelease --disable-bo=
otstrap
--disable-libmudflap --enable-libgomp --enable-lto --enable-gold
--with-plugin-ld=3D/usr/bin/gold --prefix=3D/usr/local/gcc-4.6
Thread model: posix
gcc version 4.6.0 20110312 (experimental) (GCC)=20

$ gfortran -c gf46-ice.f90
gf46-ice.f90: In function =E2=80=98assignit=E2=80=99:
gf46-ice.f90:19:0: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Fine with 4.4.3 and 4.5

Disabling the possibility of "allocate-on-assignment" by changing

   hmat =3D mmv%h0

to
   hmat(:,:) =3D mmv%h0

compiles correctly.