[Bug c++/72766] New: tree check fail in get_len, at tree.h:5303

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72766

            Bug ID: 72766
           Summary: tree check fail in get_len, at tree.h:5303
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 39038
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39038&action=edit
gzipped C++ source code

The attached C++ code, when compiled by gcc trunk dated 20160801, does this:

samplv1_jack.cpp: In member function ‘void
samplv1_jack::alsa_capture(snd_seq_event_t*)’:
samplv1_jack.cpp:563:66: internal compiler error: tree check: expected
integer_cst, have nop_expr in get_len, at tree.h:5303
0x1132d5c tree_check_failed(tree_node const*, char const*, int, char const*,
...)
        ../../src/trunk/gcc/tree.c:9742
0x8b62d1 tree_check(tree_node const*, char const*, int, char const*, tree_code)
        ../../src/trunk/gcc/tree.h:3279
0x8b62d1 wi::extended_tree<192>::get_len() const
        ../../src/trunk/gcc/tree.h:5303
0x8b62d1 wi::int_traits<generic_wide_int<wi::extended_tree<192> >
>::decompose(long*, unsigned int, generic_wide_int<wi::extended_tree<192> >
const&)
        ../../src/trunk/gcc/wide-int.h:929
0x8b62d1
wide_int_ref_storage<true>::wide_int_ref_storage<generic_wide_int<wi::extended_tree<192>
> >(generic_wide_int<wi::extended_tree<192> > const&, unsigned int)