diff options
Diffstat (limited to 'frontends/verilog/const2ast.cc')
| -rw-r--r-- | frontends/verilog/const2ast.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/frontends/verilog/const2ast.cc b/frontends/verilog/const2ast.cc index 3a3634d34..f6a17b242 100644 --- a/frontends/verilog/const2ast.cc +++ b/frontends/verilog/const2ast.cc @@ -153,7 +153,7 @@ AstNode *VERILOG_FRONTEND::const2ast(std::string code, char case_type, bool warn { if (warn_z) { AstNode *ret = const2ast(code, case_type); - if (std::find(ret->bits.begin(), ret->bits.end(), RTLIL::State::Sz) != ret->bits.end()) + if (ret != nullptr && std::find(ret->bits.begin(), ret->bits.end(), RTLIL::State::Sz) != ret->bits.end()) log_warning("Yosys has only limited support for tri-state logic at the moment. (%s:%d)\n", current_filename.c_str(), get_line_num()); return ret; |