Fixed a stupid access after delete bug

diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc
index 982d1ae3588aa734b10e0e50346ae1f91c8a2478..9b8ed76038e1e16ab057819fae19b31479000c4b 100644 (file)
--- a/frontends/ast/simplify.cc
+++ b/frontends/ast/simplify.cc
@@ -497,8 +497,9 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
                if (width != int(children[0]->bits.size())) {
                        RTLIL::SigSpec sig(children[0]->bits);
                        sig.extend_u0(width, children[0]->is_signed);
-                       delete children[0];
+                       AstNode *old_child_0 = children[0];
                        children[0] = mkconst_bits(sig.as_const().bits, children[0]->is_signed);
+                       delete old_child_0;
                }
                children[0]->is_signed = is_signed;
        }