Using Quartus 17.0.2 EDA Netlist Writer crashing

FYI, this also applies to 20.1.1. Same project, seemingly same error message. See below:

Problem Details
Error:
Internal Error: Sub-system: WSC, File: /quartus/neto/wsc/wsc_hierarchy_info.cpp, Line: 3257

obuf_atom_info != NULL

Stack Trace:

    0x81bc7: WSC_HIERARCHY_INFO::connect_ports_to_iterms() + 0x331 (neto_wsc)

    0x82108: WSC_HIERARCHY_INFO::create_hierarchy_ports() + 0x3a (neto_wsc)

    0x89d29: WSC_HIERARCHY_BUILDER::build_hierarchy_wires_and_ports() + 0x1b5 (neto_wsc)

    0x92752: WSC_HIERARCHY_BUILDER::build_hierarchy_from_partitions() + 0x56 (neto_wsc)

    0x946a8: WSC_HIERARCHY_BUILDER::build() + 0x20a (neto_wsc)

    0x25750: QNETO_START::build_hierarchy_netlist(std::string const&, WSC_NETLIST_TYPE, bool, bool, bool, bool, bool, bool, bool) + 0x23c (quartus_eda)

    0x2f985: QNETO_START::generate_simulation_files(QEDA_CALL_TYPE, QEDAU_UTIL const&) + 0x4b3 (quartus_eda)

    0x35b51: QNETO_START::generate_eda_files(QEDA_CALL_TYPE, QEDAU_UTIL const&) + 0x39 (quartus_eda)

    0x3bb66: generate_all_eda_files(CMP_FACADE*, QEDAU_UTIL const&) + 0x5d (quartus_eda)

    0x3d980: qneto_execute(CMP_FACADE*, char const*, bool, bool, std::string, std::string, std::string, bool, QEDAU_UTIL const&) + 0x1c65 (quartus_eda)

    0x117e3: QNETO_FRAMEWORK::execute() + 0x589 (quartus_eda)

    0x1b026: qexe_standard_main(QEXE_FRAMEWORK*, QEXE_OPTION_DEFINITION const**, int, char const**) + 0x6a7 (comp_qexe)

    0x11b26: qneto_main(int, char const**) + 0xa0 (quartus_eda)

    0x3ee30: msg_main_thread(void*) + 0x10 (ccl_msg)

     0x5acc: thr_final_wrapper + 0xc (ccl_thr)

    0x3eeef: msg_thread_wrapper(void* (*)(void*), void*) + 0x62 (ccl_msg)

     0x9f9c: mem_thread_wrapper(void* (*)(void*), void*) + 0x5c (ccl_mem)

     0x8b39: err_thread_wrapper(void* (*)(void*), void*) + 0x27 (ccl_err)

     0x5b0f: thr_thread_wrapper + 0x15 (ccl_thr)

    0x40ea1: msg_exe_main(int, char const**, int (*)(int, char const**)) + 0xb2 (ccl_msg)

    0x190c8: main + 0x26 (quartus_eda)

    0x202e1: __libc_start_main + 0xf1 (c.so.6)

End-trace

Executable: quartus
Comment:
None

System Information
Platform: linux64
OS name: Debian GNU/Linux
OS version: 9

Quartus Prime Information
Address bits: 64
Version: 20.1.1
Build: 720
Edition: Lite Edition