# bug_reports

### SymbiYosys_#47

[SymbiYosys fails with an internal exception instead of generating counter example when using abc](https://github.com/YosysHQ/SymbiYosys/issues/27)

Reported on Github, fixed in [YosysHQ/yosys@e112d2f](https://github.com/YosysHQ/yosys/commit/e112d2fbf5a31f00ef19e6d05f28fecc1e9c56b9)