The following testcase gives an internal compiler error with both gfortran
4.0.2 and gfortran 4.1.0 20051015:
module crash
implicit none
type foo
integer :: i = 0
type (foo), pointer :: next
end type foo
type (foo), save :: bar
end module crash
Remove the default initialization with 0 and it compiles just fine.
(Remove the pointer declaration in the derived type and it compiles fine.
Remove the declaration of variable bar and it compiles fine.)
It reminds me a bit of bug 16606, but is different as the compiler crashes.
Test case compiles fine with ifort Version 9.0 Build 20050809Z, G95 (GCC 4.0.1
(g95!) Oct 16 2005).
-- gfortran 4.1 20051015 output: --
% /usr/local/gcc-4.1-20051015/bin/gfortran -v -save-temps -c
bug-gfortran-4.1.f90
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.1-20051015/configure --enable-shared
--prefix=/usr/local/gcc-4.1-20051015 --enable-languages=c,c++,fortran
--enable-threads --enable-__cxa_atexit
Thread model: posix
gcc version 4.1.0 20051015 (experimental)
/usr/local/gcc-4.1-20051015/libexec/gcc/i686-pc-linux-gnu/4.1.0/f951
bug-gfortran-4.1.f90 -quiet -dumpbase bug-gfortran-4.1.f90 -mtune=pentiumpro
-auxbase bug-gfortran-4.1 -version -o bug-gfortran-4.1.s
GNU F95 version 4.1.0 20051015 (experimental) (i686-pc-linux-gnu)
compiled by GNU C version 4.1.0 20051015 (experimental).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
bug-gfortran-4.1.f90:0: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
-- gfortran 4.0.2 output: --
/usr/local/gcc-4.0.2/bin/gfortran -v -save-temps -c bug-gfortran-4.1.f90
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.0.2/configure --enable-shared
--prefix=/usr/local/gcc-4.0.2 --enable-languages=c,c++,f95 --enable-threads
--enable-__cxa_atexit
Thread model: posix
gcc version 4.0.2
/usr/local/gcc-4.0.2/libexec/gcc/i686-pc-linux-gnu/4.0.2/f951
bug-gfortran-4.1.f90 -quiet -dumpbase bug-gfortran-4.1.f90 -mtune=pentiumpro
-auxbase bug-gfortran-4.1 -version -o bug-gfortran-4.1.s
GNU F95 version 4.0.2 (i686-pc-linux-gnu)
compiled by GNU C version 4.0.2.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
bug-gfortran-4.1.f90:0: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
Environment:
System: Linux antares 2.6.8-24.17-bigsmp #1 SMP Tue Jul 19 08:56:33 UTC 2005
i686 unknown unknown GNU/Linux
Architecture: i686
Linux 2.6.8-24.17-bigsmp
glibc 2.3.4
SuSE 9.2
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
% cat /proc/cpuinfo | grep "model name"
model name : AMD Opteron(tm) Processor 250
--
Summary: gfortran ICE for valid derived type definition with
default initialization
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: critical
Priority: P2
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: sven dot buijssen at math dot uni-dortmund dot de
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24426
