[Bug c++/72825] New: ICE on invalid C++ code on x86_64-linux-gnu (internal compiler error: tree check: expected array_type, have error_mark in array_ref_low_bound, at tree.c:13013)

chengniansun at gmail dot com gcc-bugzilla@gcc.gnu.org
Sat Aug 6 13:26:00 GMT 2016


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72825

            Bug ID: 72825
           Summary: ICE on invalid C++ code on x86_64-linux-gnu (internal
                    compiler error: tree check: expected array_type, have
                    error_mark in array_ref_low_bound, at tree.c:13013)
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: chengniansun at gmail dot com
  Target Milestone: ---

$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160805 (experimental) [trunk revision 239171] (GCC)
$
$ g++-trunk small.C
small.C:6:12: error: uninitialized const ‘Wrapper::msgPtr’ [-fpermissive]
 const char Wrapper::msgPtr[];
            ^~~~~~~
small.C:6:12: error: storage size of ‘Wrapper::msgPtr’ isn’t known
small.C: In static member function ‘static const char* Wrapper::m_fn1()’:
small.C:4:48: internal compiler error: tree check: expected array_type, have
error_mark in array_ref_low_bound, at tree.c:13013
   static const char *m_fn1() { return &msgPtr[0]; }
                                        ~~~~~~~~^
0x10409ec tree_check_failed(tree_node const*, char const*, int, char const*,
...)
        ../../gcc-source-trunk/gcc/tree.c:9742
0x105ec87 tree_check(tree_node*, char const*, int, char const*, tree_code)
        ../../gcc-source-trunk/gcc/tree.h:3023
0x105ec87 array_ref_low_bound(tree_node*)
        ../../gcc-source-trunk/gcc/tree.c:13013
0xb5f9cf gimplify_compound_lval
        ../../gcc-source-trunk/gcc/gimplify.c:2117
0xb57891 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-source-trunk/gcc/gimplify.c:10422
0xb59126 gimplify_addr_expr
        ../../gcc-source-trunk/gcc/gimplify.c:5211
0xb59126 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-source-trunk/gcc/gimplify.c:10516
0xb6a287 gimplify_modify_expr
        ../../gcc-source-trunk/gcc/gimplify.c:4808
0xb59c1d gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-source-trunk/gcc/gimplify.c:10470
0xb5c576 gimplify_stmt(tree_node**, gimple**)
        ../../gcc-source-trunk/gcc/gimplify.c:5804
0xb58e79 gimplify_and_add(tree_node*, gimple**)
        ../../gcc-source-trunk/gcc/gimplify.c:427
0xb58e79 gimplify_return_expr
        ../../gcc-source-trunk/gcc/gimplify.c:1371
0xb58e79 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-source-trunk/gcc/gimplify.c:10719
0xb5c576 gimplify_stmt(tree_node**, gimple**)
        ../../gcc-source-trunk/gcc/gimplify.c:5804
0xb6baee gimplify_body(tree_node*, bool)
        ../../gcc-source-trunk/gcc/gimplify.c:11653
0xb6c0e6 gimplify_function_tree(tree_node*)
        ../../gcc-source-trunk/gcc/gimplify.c:11809
0x9d5a37 cgraph_node::analyze()
        ../../gcc-source-trunk/gcc/cgraphunit.c:625
0x9d8ca5 analyze_functions
        ../../gcc-source-trunk/gcc/cgraphunit.c:1086
0x9d9a7c symbol_table::finalize_compilation_unit()
        ../../gcc-source-trunk/gcc/cgraphunit.c:2547
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
$ cat small.C
class Wrapper {
public:
  static const char msgPtr[];
  static const char *m_fn1() { return &msgPtr[0]; }
};
const char Wrapper::msgPtr[];
int main() { Wrapper::m_fn1(); }
$


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