==27519== Syscall param write(buf) points to uninitialised byte(s)
==27519==    at 0x82545BD: ??? (syscall-template.S:84)
==27519==    by 0x81EB7E6: _IO_file_write@@GLIBC_2.2.5 (fileops.c:1271)
==27519==    by 0x81EAB31: new_do_write (fileops.c:526)
==27519==    by 0x81EC8A8: _IO_do_write@@GLIBC_2.2.5 (fileops.c:502)
==27519==    by 0x81EBE85: _IO_file_xsputn@@GLIBC_2.2.5 (fileops.c:1339)
==27519==    by 0x81E107A: fwrite (iofwrite.c:39)
==27519==    by 0x41797AEE: octave::gz::zipper::deflate() (gzip.cc:435)
==27519==    by 0x41799569: string_vector octave::xzip<octave::gz>(Array<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const&, std::function<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)> const&)::{lambda(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)#1}::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const (gzip.cc:251)
==27519==    by 0x417984F7: operator() (functional:2127)
==27519==    by 0x417984F7: string_vector octave::xzip<octave::gz>(Array<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const&, std::function<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)> const&) (gzip.cc:528)
==27519==    by 0x41798981: string_vector octave::xzip<octave::gz>(Array<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const&) (gzip.cc:544)
==27519==    by 0x4179588D: octave_value_list octave::xzip<octave::gz>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, octave_value_list const&) (gzip.cc:579)
==27519==    by 0x417960AD: Fgzip(octave_value_list const&, int) (gzip.cc:616)
==27519==  Address 0x1c890c53 is 3 bytes inside a block of size 4,096 alloc'd
==27519==    at 0x4C2BBAF: malloc (vg_replace_malloc.c:299)
==27519==    by 0x81DFA31: _IO_file_doallocate (filedoalloc.c:101)
==27519==    by 0x81EDA45: _IO_doallocbuf (genops.c:398)
==27519==    by 0x81ECDA7: _IO_file_overflow@@GLIBC_2.2.5 (fileops.c:828)
==27519==    by 0x81EBE85: _IO_file_xsputn@@GLIBC_2.2.5 (fileops.c:1339)
==27519==    by 0x81E107A: fwrite (iofwrite.c:39)
==27519==    by 0x41797AEE: octave::gz::zipper::deflate() (gzip.cc:435)
==27519==    by 0x41799569: string_vector octave::xzip<octave::gz>(Array<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const&, std::function<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)> const&)::{lambda(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)#1}::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const (gzip.cc:251)
==27519==    by 0x417984F7: operator() (functional:2127)
==27519==    by 0x417984F7: string_vector octave::xzip<octave::gz>(Array<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const&, std::function<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)> const&) (gzip.cc:528)
==27519==    by 0x41798981: string_vector octave::xzip<octave::gz>(Array<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const&) (gzip.cc:544)
==27519==    by 0x4179588D: octave_value_list octave::xzip<octave::gz>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, octave_value_list const&) (gzip.cc:579)
==27519==    by 0x417960AD: Fgzip(octave_value_list const&, int) (gzip.cc:616)
==27519==