Gfortran does not report an error if an allocatable array is set to an array of larger size, for example in the code below.
program xalloc_words ! shows error with nonconformant assignment of an allocatable array ! not caught by most compilers character (len=1), allocatable :: w(:) integer, allocatable :: ivec(:) integer :: jvec(2) allocate (w(2),ivec(2)) w = ["1","2","3"] write (*,*) "size(w)=",size(w),"w =",w ivec = [1,2,3] write (*,*) "size(ivec)=",size(w),"ivec =",ivec ! error in line below IS caught if not commented ! jvec = [1,2,3] end program xalloc_words U:\vrao\fortran>gfortran -v Using built-in specs. Target: i386-pc-mingw32 Configured with: ../trunk/configure --prefix=/mingw --enable-languages=c,fortran --with-gmp=/home/coudert/local --disable-nls --with-ld=/mingw/bin/ld --with-as=/mingw/bin/as --disable-werror --enable-bootstrap --enable-threads --host=i386-pc-mingw32 --disable-shared --enable-libgomp Thread model: win32 gcc version 4.3.0 20061021 (experimental) U:\vrao\fortran>gfortran -W -Wall -pedantic-errors -std=f2003 -fbounds-check -Werror xalloc_words.f90 In file xalloc_words.f90:6 integer :: jvec(2) 1 Warning: Unused variable jvec declared at (1) U:\vrao\fortran>a size(w)= 2 w =12 size(ivec)= 2 ivec = 1 2 Vivek Rao -- Summary: Detect nonconforming assignment of allocatable arrays Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: enhancement Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: vivekrao4 at yahoo dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31059