compiler/qv4isel_masm.cpp:498: JSC::MacroAssemblerCodeRef QQmlJS::MASM::Assembler::link(int*): Assertion `target.isSet()' failed.

When running my QML code, the following assert occurs:

compiler/qv4isel_masm.cpp:498: JSC::MacroAssemblerCodeRef QQmlJS::MASM::Assembler::link(int*): Assertion `target.isSet()' failed.

Note: I am currently in a state of porting from QtQuick 1 to QtQuick 2, so have many Javascript errors, but I do no have this issue with Qt 5.1.1.

Unfortunately, I am not in a position to post the code that causes the issue, nor have I been able to determine the smallest subset of code that reproduces the issue.

Maybe with some insight into the assert, I may be able to track down what is causing it.