[Bug c++/51421] New: [c++0x] ICE with invalid use of auto

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51421

             Bug #: 51421
           Summary: [c++0x] ICE with invalid use of auto
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: reich...@gcc.gnu.org


The following invalid code snippet triggers an ICE since GCC 4.4.0:

=====================
int foo(int);

void bar()
{
  auto i = foo(i);
}
=====================

bug.cc: In function 'void bar()':
bug.cc:5:17: internal compiler error: tree check: expected record_type or
union_type or qual_union_type, have template_type_parm in lookup_conversions,
at cp/search.c:2499
Please submit a full bug report, [etc.]

A slightly different example triggers an ICE in a different position:

=====================
struct A {};

A foo(A);

void bar()
{
  auto a = foo(a);
}
=====================

bug.cc: In function 'void bar()':
bug.cc:7:17: internal compiler error: tree check: expected record_type or
union_type or qual_union_type, have template_type_parm in lookup_base, at
cp/search.c:212
Please submit a full bug report, [etc.]