Decompiler crashes when attempting to disassemble inx file

[ActiveTutorial]

It gives this error:

active@fimma:~/.../10$ ./installscript-decompiler/bin/Debug/InstallScriptDecompiler ./ISContents/Disk1/setup.inx setup.rul --show-actions
Starting decompilation...
InstallScriptDecompiler: /home/active/.../10/installscript-decompiler/src/Frontend/InstallShield_New/Actions/UnUseDLLAction.cpp:10: virtual void newis::CUnUseDLLAction::print(std::ostream&) const: Assertion `m_arguments.size() == 2' failed.
Aborted (core dumped)
active@fimma:~/.../10$ 

The .rul file still has some output but it seems to be incomplete. When running with --show-decompiled the .rul file is completely empty though no errror message other than segmentation fault appears.

[ActiveTutorial]

The inx file originates from concordance 10 server: https://software.cloudnine.com/Concordance/Concordance10_Install.exe