Release does not work on GHDL

[ktbarrett]

This affects all tests in test_force_release.

MODULE=test_force_release TESTCASE= TOPLEVEL=sample_module TOPLEVEL_LANG=vhdl \
 /home/kaleb/.local/bin/ghdl -r  --time-resolution=ps --workdir=sim_build -Psim_build --work=work sample_module  --vpi=/home/kaleb/dev/cocotb/src/cocotb/libs/libcocotbvpi_ghdl.so  
loading VPI module '/home/kaleb/dev/cocotb/src/cocotb/libs/libcocotbvpi_ghdl.so'
     -.--ns INFO     gpi                                ..mbed/gpi_embed.cpp:108  in set_program_name_in_venv        Using Python virtual environment interpreter at /home/kaleb/.pyenv/versions/cocotb-system/bin/python
     -.--ns INFO     gpi                                ../gpi/GpiCommon.cpp:101  in gpi_print_registered_impl       VPI registered
VPI module loaded!
     0.00ns INFO     cocotb                             Running on GHDL version 4.0.0-dev (3.0.0.r684.gc84120e00) [Dunoon edition]
     0.00ns INFO     cocotb                             Running tests with cocotb v2.0.0.dev0+5bd689a6 from /home/kaleb/dev/cocotb/src/cocotb
     0.00ns WARNING  gpi                                vpi_iterate returned NULL for type vpiInstance for object NULL
     0.00ns INFO     cocotb                             Seeding Python random module with 1712516913
     0.00ns INFO     cocotb.regression                  running test_force_release.test_hdl_writes_dont_overwrite_force_combo (1/7)
                                                            Test Forcing then later Releasing a combo signal.
/home/kaleb/dev/cocotb/tests/test_cases/test_force_release/../../../tests/designs/sample_module/sample_module.vhdl:128:7:@0ms:(report note): stream_in_string has been updated, new value is ''
    20.00ns INFO     cocotb.regression                  test_force_release.test_hdl_writes_dont_overwrite_force_combo failed
                                                        Traceback (most recent call last):
                                                          File "/home/kaleb/dev/cocotb/tests/test_cases/test_force_release/test_force_release.py", line 30, in test_hdl_writes_dont_overwrite_force_combo
                                                            assert dut.stream_out_data_comb.value == 3
                                                        AssertionError: assert LogicArray('00000101', Range(7, 'downto', 0)) == 3
                                                         +  where LogicArray('00000101', Range(7, 'downto', 0)) = LogicObject(sample_module.stream_out_data_comb).value
                                                         +    where LogicObject(sample_module.stream_out_data_comb) = HierarchyObject(sample_module).stream_out_data_comb
    20.00ns INFO     cocotb.regression                  running test_force_release.test_hdl_writes_dont_overwrite_force_registered (2/7)
                                                            Test Forcing then Releasing a registered output.
    50.00ns INFO     cocotb.regression                  test_force_release.test_hdl_writes_dont_overwrite_force_registered failed
                                                        Traceback (most recent call last):
                                                          File "/home/kaleb/dev/cocotb/tests/test_cases/test_force_release/test_force_release.py", line 49, in test_hdl_writes_dont_overwrite_force_registered
                                                            assert dut.stream_out_data_registered.value == 4
                                                        AssertionError: assert LogicArray('00000101', Range(7, 'downto', 0)) == 4
                                                         +  where LogicArray('00000101', Range(7, 'downto', 0)) = LogicObject(sample_module.stream_out_data_registered).value
                                                         +    where LogicObject(sample_module.stream_out_data_registered) = HierarchyObject(sample_module).stream_out_data_registered
    50.00ns INFO     cocotb.regression                  running test_force_release.test_force_followed_by_release_combo (3/7)
                                                            Test if Force followed immediately by Release works on combo signals.
    60.00ns INFO     cocotb.regression                  test_force_release.test_force_followed_by_release_combo failed
                                                        Traceback (most recent call last):
                                                          File "/home/kaleb/dev/cocotb/tests/test_cases/test_force_release/test_force_release.py", line 69, in test_force_followed_by_release_combo
                                                            assert dut.stream_out_data_comb.value == 16
                                                        AssertionError: assert LogicArray('00000101', Range(7, 'downto', 0)) == 16
                                                         +  where LogicArray('00000101', Range(7, 'downto', 0)) = LogicObject(sample_module.stream_out_data_comb).value
                                                         +    where LogicObject(sample_module.stream_out_data_comb) = HierarchyObject(sample_module).stream_out_data_comb
    60.00ns INFO     cocotb.regression                  running test_force_release.test_force_followed_by_release_registered (4/7)
                                                            Test if Force followed immediately by Release works on registered signals.
    80.00ns INFO     cocotb.regression                  test_force_release.test_force_followed_by_release_registered failed
                                                        Traceback (most recent call last):
                                                          File "/home/kaleb/dev/cocotb/tests/test_cases/test_force_release/test_force_release.py", line 87, in test_force_followed_by_release_registered
                                                            assert dut.stream_out_data_registered.value == 90
                                                        AssertionError: assert LogicArray('00000101', Range(7, 'downto', 0)) == 90
                                                         +  where LogicArray('00000101', Range(7, 'downto', 0)) = LogicObject(sample_module.stream_out_data_registered).value
                                                         +    where LogicObject(sample_module.stream_out_data_registered) = HierarchyObject(sample_module).stream_out_data_registered
    80.00ns INFO     cocotb.regression                  running test_force_release.test_cocotb_writes_dont_overwrite_force_combo (5/7)
                                                            Test Deposits following a Force don't overwrite the value.
   100.00ns INFO     cocotb.regression                  test_force_release.test_cocotb_writes_dont_overwrite_force_combo failed
                                                        Traceback (most recent call last):
                                                          File "/home/kaleb/dev/cocotb/tests/test_cases/test_force_release/test_force_release.py", line 110, in test_cocotb_writes_dont_overwrite_force_combo
                                                            assert dut.stream_out_data_comb.value == 10
                                                        AssertionError: assert LogicArray('00001011', Range(7, 'downto', 0)) == 10
                                                         +  where LogicArray('00001011', Range(7, 'downto', 0)) = LogicObject(sample_module.stream_out_data_comb).value
                                                         +    where LogicObject(sample_module.stream_out_data_comb) = HierarchyObject(sample_module).stream_out_data_comb
   100.00ns INFO     cocotb.regression                  running test_force_release.test_cocotb_writes_dont_overwrite_force_registered (6/7)
                                                            Test Deposits following a Force don't overwrite the value.
   140.01ns INFO     cocotb.regression                  test_force_release.test_cocotb_writes_dont_overwrite_force_registered failed
                                                        Traceback (most recent call last):
                                                          File "/home/kaleb/dev/cocotb/tests/test_cases/test_force_release/test_force_release.py", line 143, in test_cocotb_writes_dont_overwrite_force_registered
                                                            assert dut.stream_out_data_registered.value == 10
                                                        AssertionError: assert LogicArray('00001011', Range(7, 'downto', 0)) == 10
                                                         +  where LogicArray('00001011', Range(7, 'downto', 0)) = LogicObject(sample_module.stream_out_data_registered).value
                                                         +    where LogicObject(sample_module.stream_out_data_registered) = HierarchyObject(sample_module).stream_out_data_registered
   140.01ns INFO     cocotb.regression                  running test_force_release.test_force_followed_by_release_correct_value (7/7)
                                                            Tests if Forcing then immediately Releasing a signal yield the correct value.
   160.01ns INFO     cocotb.regression                  test_force_release.test_force_followed_by_release_correct_value passed: failed as expected (result was AssertionError)
   160.01ns INFO     cocotb.regression                  *******************************************************************************************************************************
                                                        ** TEST                                                                   STATUS  SIM TIME (ns)  REAL TIME (s)  RATIO (ns/s) **
                                                        *******************************************************************************************************************************
                                                        ** test_force_release.test_hdl_writes_dont_overwrite_force_combo           FAIL          20.00           0.00      24273.81  **
                                                        ** test_force_release.test_hdl_writes_dont_overwrite_force_registered      FAIL          30.00           0.00      46484.42  **
                                                        ** test_force_release.test_force_followed_by_release_combo                 FAIL          10.00           0.00      38912.09  **
                                                        ** test_force_release.test_force_followed_by_release_registered            FAIL          20.00           0.00      24415.10  **
                                                        ** test_force_release.test_cocotb_writes_dont_overwrite_force_combo        FAIL          20.00           0.00      48019.62  **
                                                        ** test_force_release.test_cocotb_writes_dont_overwrite_force_registered   FAIL          40.00           0.00      61682.48  **
                                                        ** test_force_release.test_force_followed_by_release_correct_value         PASS          20.00           0.00      70973.16  **
                                                        *******************************************************************************************************************************
                                                        ** TESTS=7 PASS=1 FAIL=6 SKIP=0                                                         160.01           0.01      14667.00  **
                                                        *******************************************************************************************************************************