Qt Creator crashes using qbs and clicking on Build -> Build Project

Crashed Thread:  21  QThread

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000

Thread 21 Crashed:: QThread
0   libsystem_kernel.dylib        	0x00007fff8ef71866 __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fff8d8b335c pthread_kill + 92
2   libsystem_c.dylib             	0x00007fff895f9b1a abort + 125
3   libc++abi.dylib               	0x00007fff94392f31 abort_message + 257
4   libc++abi.dylib               	0x00007fff943b8952 default_terminate_handler() + 264
5   libobjc.A.dylib               	0x00007fff93281322 _objc_terminate() + 124
6   libc++abi.dylib               	0x00007fff943b61d1 std::__terminate(void (*)()) + 8
7   libc++abi.dylib               	0x00007fff943b5c5b __cxa_throw + 124
8   libqbscore.1.2.0.dylib        	0x0000000112e0ae46 qbs::Internal::throwAssertLocation(char const*, char const*, int) + 214
9   libqbscore.1.2.0.dylib        	0x0000000112d53866 qbs::Internal::QtMocScanner::apply(QScriptEngine*, qbs::Internal::Artifact const*) + 2310
10  libqbscore.1.2.0.dylib        	0x0000000112d5211f qbs::Internal::QtMocScanner::js_apply(QScriptContext*, QScriptEngine*, void*) + 63
11  QtScript                      	0x00000001013cebe9 0x1012b1000 + 1170409
12  QtScript                      	0x0000000101340bdf 0x1012b1000 + 588767
13  QtScript                      	0x0000000101326d19 0x1012b1000 + 482585
14  ???                           	0x00002b47f5731b6e 0 + 47588060633966
15  QtScript                      	0x00000001012f3286 0x1012b1000 + 270982
16  QtScript                      	0x000000010135af6e 0x1012b1000 + 696174
17  QtScript                      	0x0000000101340cba 0x1012b1000 + 588986
18  QtScript                      	0x00000001013cbd2b QScriptValue::call(QScriptValue const&, QList<QScriptValue> const&) + 875
19  libqbscore.1.2.0.dylib        	0x0000000112d5ebfc qbs::Internal::RulesApplicator::runOutputArtifactsScript(qbs::Internal::ArtifactSet const&, QList<QScriptValue> const&) + 204
20  libqbscore.1.2.0.dylib        	0x0000000112d5b0c9 qbs::Internal::RulesApplicator::doApply(qbs::Internal::ArtifactSet, QScriptValue&) + 4793
21  libqbscore.1.2.0.dylib        	0x0000000112d5994f qbs::Internal::RulesApplicator::applyRule(QSharedPointer<qbs::Internal::Rule const> const&) + 1263
22  libqbscore.1.2.0.dylib        	0x0000000112d5941b qbs::Internal::RulesApplicator::applyRuleInEvaluationContext(QSharedPointer<qbs::Internal::Rule const> const&) + 107
23  libqbscore.1.2.0.dylib        	0x0000000112d58967 qbs::Internal::RuleNode::apply(qbs::Internal::Logger const&, qbs::Internal::ArtifactSet const&, qbs::Internal::RuleNode::ApplicationResult*) + 3191
24  libqbscore.1.2.0.dylib        	0x0000000112d2ebb6 qbs::Internal::Executor::executeRuleNode(qbs::Internal::RuleNode*) + 870
25  libqbscore.1.2.0.dylib        	0x0000000112d328ad non-virtual thunk to qbs::Internal::Executor::visit(qbs::Internal::RuleNode*) + 13
26  libqbscore.1.2.0.dylib        	0x0000000112d57b49 qbs::Internal::RuleNode::accept(qbs::Internal::BuildGraphVisitor*) + 25
27  libqbscore.1.2.0.dylib        	0x0000000112d2c15c qbs::Internal::Executor::scheduleJobs() + 220
28  libqbscore.1.2.0.dylib        	0x0000000112d2abcd qbs::Internal::Executor::doBuild() + 1069
29  libqbscore.1.2.0.dylib        	0x0000000112d2a73f qbs::Internal::Executor::build() + 15
30  libqbscore.1.2.0.dylib        	0x0000000112e0d29e qbs::Internal::Executor::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) + 414
31  QtCore                        	0x0000000100e32da6 QMetaObject::activate(QObject*, int, int, void**) + 2550
32  QtCore                        	0x0000000100c19375 0x100bef000 + 172917
33  libsystem_pthread.dylib       	0x00007fff8d8b2899 _pthread_body + 138
34  libsystem_pthread.dylib       	0x00007fff8d8b272a _pthread_start + 137
35  libsystem_pthread.dylib       	0x00007fff8d8b6fc9 thread_start + 13