diff options
| -rw-r--r-- | gcc/go/gofrontend/expressions.cc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc index a5a056b12ed..35bcdbb5145 100644 --- a/gcc/go/gofrontend/expressions.cc +++ b/gcc/go/gofrontend/expressions.cc @@ -10259,6 +10259,14 @@ Index_expression::do_lower(Gogo*, Named_object*, Statement_inserter*, int) { Expression* deref = Expression::make_unary(OPERATOR_MULT, left, location); + + // For an ordinary index into the array, the pointer will be + // dereferenced. For a slice it will not--the resulting slice + // will simply reuse the pointer, which is incorrect if that + // pointer is nil. + if (end != NULL || cap != NULL) + deref->issue_nil_check(); + return Expression::make_array_index(deref, start, end, cap, location); } else if (type->is_string_type()) |