Building Qt from source, it crash when building the 'trafficlight-widgets-static' example. Log attached. I built the 5.12.3 and 5.12.4 without problem using the same script. But I found a weird thing after I build the 5.12.4 today, the qtscxml/examples/scxml/*-common are not been copied to examples-dir set in ./configure. I didn't know if it happen with 5.12.3, right know I am building the 5.13.0 with '-nomake examples' option set and without '-compile-examples'. I will update this Issue after few more tests.