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Fix segfault on failed VERILOG_FRONTEND::const2ast, closes #1131

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Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2019-06-26 11:09:43 +02:00
parent 8e9ef891fe
commit f6053b8810
1 changed files with 1 additions and 1 deletions
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2
frontends/verilog/const2ast.cc
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@ -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;