qmlcodemarker.cpp:182:26: error: variable type 'QmlMarkupVisitor' is an abstract class

agent:2019/03/18 03:05:13 build.go:197: qmlcodemarker.cpp:182:26: error: variable type 'QmlMarkupVisitor' is an abstract class
agent:2019/03/18 03:05:13 build.go:197:         QmlMarkupVisitor visitor(code, pragmas, &engine);
agent:2019/03/18 03:05:13 build.go:197:                          ^
agent:2019/03/18 03:05:13 build.go:197: /Users/qt/work/install/include/QtQml/5.12.2/QtQml/private/qqmljsastvisitor_p.h:404:18: note: unimplemented pure virtual method 'throwRecursionDepthError' in 'QmlMarkupVisitor'
agent:2019/03/18 03:05:13 build.go:197:     virtual void throwRecursionDepthError() = 0;
agent:2019/03/18 03:05:13 build.go:197:                  ^
agent:2019/03/18 03:05:13 build.go:197: 1 error generated.