[Bug fortran/66942] trans-expr.c:5701 runtime error: member call on null pointer of type 'struct vec'

["zeccav at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66942

--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
Did you put the gcc_assert line in the source?
If you have not a sanitized version you will not see the null pointer
dereferencing
Anyway this is what you asked me: (please not the runtime error:
sanitizer messages)

~/local/gcc-5.2.0-sanitized/bin/gfortran -v -S gfbug120.f
Using built-in specs.
COLLECT_GCC=/home/vitti/local/gcc-5.2.0-sanitized/bin/gfortran
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-5.2.0/configure
--prefix=/home/vitti/local/gcc-5.2.0-sanitized --disable-bootstrap
--enable-languages=c,c++,fortran --disable-lto
Thread model: posix
gcc version 5.2.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-S' '-mtune=generic' '-march=x86-64'

/home/vitti/local/gcc-5.2.0-sanitized/libexec/gcc/x86_64-unknown-linux-gnu/5.2.0/f951
gfbug120.f -ffixed-form -quiet -dumpbase gfbug120.f -mtune=generic
-march=x86-64 -auxbase gfbug120 -version -o gfbug120.s
-fintrinsic-modules-path
/home/vitti/local/gcc-5.2.0-sanitized/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/finclude
GNU Fortran (GCC) version 5.2.0 (x86_64-unknown-linux-gnu)
        compiled by GNU C version 5.2.0, GMP version 6.0.0, MPFR version
3.1.2, MPC version 1.0.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran2008 (GCC) version 5.2.0 (x86_64-unknown-linux-gnu)
        compiled by GNU C version 5.2.0, GMP version 6.0.0, MPFR version
3.1.2, MPC version 1.0.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
../../gcc-5.2.0/gcc/fortran/trans-expr.c:5701:19: runtime error:
member call on null pointer of type 'struct vec'
../../gcc-5.2.0/gcc/fortran/trans-expr.c:5704:19: runtime error:
member call on null pointer of type 'struct vec'
../../gcc-5.2.0/gcc/fortran/trans-expr.c:5707:19: runtime error:
member call on null pointer of type 'struct vec'
COMPILER_PATH=/home/vitti/local/gcc-5.2.0-sanitized/libexec/gcc/x86_64-unknown-linux-gnu/5.2.0/:/home/vitti/local/gcc-5.2.0-sanitized/libexec/gcc/x86_64-unknown-linux-gnu/5.2.0/:/home/vitti/local/gcc-5.2.0-sanitized/libexec/gcc/x86_64-unknown-linux-gnu/:/home/vitti/local/gcc-5.2.0-sanitized/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/:/home/vitti/local/gcc-5.2.0-sanitized/lib/gcc/x86_64-unknown-linux-gnu/
LIBRARY_PATH=/home/vitti/local/gcc-5.2.0-sanitized/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/:/home/vitti/local/gcc-5.2.0-sanitized/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/../../../../x86_64-unknown-linux-gnu/lib/../lib64/:/home/vitti/local/gcc-5.2.0-sanitized/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/ipp/../compiler/lib/intel64/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/ipp/lib/intel64/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/compiler/lib/intel64/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/tbb/lib/intel64/gcc4.4/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/mkl/lib/intel64/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/tbb/lib/intel64/gcc4.1/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/daal/lib/intel64_lin/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/daal/../tbb/lib/intel64_lin/gcc4.4/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/daal/../compiler/lib/intel64_lin/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/tbb/lib/intel64/gcc4.1/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/ipp/../compiler/lib/intel64/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/ipp/lib/intel64/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/compiler/lib/intel64/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/tbb/lib/intel64/gcc4.4/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/mkl/lib/intel64/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/tbb/lib/intel64/gcc4.1/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/daal/lib/intel64_lin/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/daal/../tbb/lib/intel64_lin/gcc4.4/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/daal/../compiler/lib/intel64_lin/:/home/vitti/intel/compilers_and_libraries_2016.0.069/linux/tbb/lib/intel64/gcc4.1/:/home/vitti/local/gcc-5.2.0-sanitized/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/../../../../x86_64-unknown-linux-gnu/lib/:/home/vitti/local/gcc-5.2.0-sanitized/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-S' '-mtune=generic' '-march=x86-64'