Info: Running Quartus Prime Analysis & Synthesis
    Info: Version 18.1.0 Build 625 09/12/2018 SJ Lite Edition
    Info: Processing started: Mon Jul 22 13:39:30 2019
Info: Command: quartus_map --read_settings_files=on --write_settings_files=off picosoc-yosys -c picosoc-yosys
Warning (12473): User specified to use only one processors but 6 processors were detected which could be used to decrease run time.
Info (12021): Found 1 design units, including 1 entities, in source file //wsl$/ubuntu-18.04/home/lofty/yosys-bench/verilog/benchmarks_large/picosoc/picosoc-yosys.vqm
    Info (12023): Found entity 1: picosoc_top File: //wsl$/Ubuntu-18.04/home/lofty/yosys-bench/verilog/benchmarks_large/picosoc/picosoc-yosys.vqm Line: 5
Info (12127): Elaborating entity "picosoc_top" for the top level hierarchy
Internal Error: Sub-system: SGN, File: /quartus/synth/sgn/sgn_utility.cpp, Line: 4893
dimension == 0
Stack Trace:
    0x2d744: SGN_UTILITY::convert_group_string_name + 0x1e4 (synth_sgn)
   0x126964: SGN_NAME_MAKER::process_group_name + 0x2b4 (synth_sgn)
   0x1278ad: SGN_NAME_MAKER::process_original_netlist_name + 0xed (synth_sgn)
   0x124977: SGN_NAME_MAKER::generate_hier_name + 0x87 (synth_sgn)
   0x128bb5: SGN_NAME_MAKER::start + 0x55 (synth_sgn)
    0xae4a0: SGN_EXTRACTOR::create_names + 0x40 (synth_sgn)
    0xb40b8: SGN_EXTRACTOR::post_process_user_hierarchies + 0x108 (synth_sgn)
    0xb43a7: SGN_EXTRACTOR::post_processing + 0x57 (synth_sgn)
    0xb093b: SGN_EXTRACTOR::extract + 0x24b (synth_sgn)
    0x1324e: sgn_qic_full + 0x19e (synth_sgn)
     0x4351: qsyn_execute_sgn + 0x131 (quartus_map)
    0x13f9c: QSYN_FRAMEWORK::execute_core + 0x12c (quartus_map)
    0x13aa6: QSYN_FRAMEWORK::execute + 0x496 (quartus_map)
    0x112bc: qexe_do_normal + 0x1ec (comp_qexe)
    0x16142: qexe_run + 0x432 (comp_qexe)
    0x16e51: qexe_standard_main + 0xc1 (comp_qexe)
    0x1b08b: qsyn_main + 0x51b (quartus_map)
    0x12e98: msg_main_thread + 0x18 (CCL_MSG)
    0x1467e: msg_thread_wrapper + 0x6e (CCL_MSG)
    0x16660: mem_thread_wrapper + 0x70 (ccl_mem)
    0x12761: msg_exe_main + 0xa1 (CCL_MSG)
    0x29872: __tmainCRTStartup + 0x10e (quartus_map)
    0x17bd3: BaseThreadInitThunk + 0x13 (KERNEL32)
    0x6ce70: RtlUserThreadStart + 0x20 (ntdll)

End-trace

ERROR: Error(s) found while running an executable. See report file(s) for error message(s). Message log indicates which executable was run last.