USD: Assert in io_usd_import unittest #122606

New Issue

Bastien Montagne · 2024-06-01T20:41:57+02:00

Bastien Montagne commented

2024-06-01 20:41:57 +02:00

System Information
Operating system: N/A
Graphics card: N/A

Blender Version
Broken: Current main
Worked: ??

Short description of error

Running the io_usd_import unittest in a debug build fails in current main code due to an assert.

Backtrace:

4   _BLI_assert_abort                                    BLI_assert.c           51   0x15e1e21e     
5   blender::GMutableSpan::typed<int>                    BLI_generic_span.hh    215  0x1173b997     
6   blender::io::usd::copy_primvar_to_blender_attribute  usd_attribute_utils.cc 108  0x1bfeaaad     
7   blender::io::usd::USDCurvesReader::read_custom_data  usd_reader_curve.cc    320  0x1c1cd451     
8   blender::io::usd::USDCurvesReader::read_curve_sample usd_reader_curve.cc    288  0x1c1c971b     
9   blender::io::usd::USDCurvesReader::read_object_data  usd_reader_curve.cc    145  0x1c1c4292     
10  blender::io::usd::import_startjob                    usd_capi_import.cc     346  0x1c07f02a     
11  blender::io::usd::USD_import                         usd_capi_import.cc     538  0x1c07a0a2     
12  wm_usd_import_exec                                   io_usd.cc              849  0x1e4b45a3     
13  wm_operator_invoke                                   wm_event_system.cc     1586 0x16e6fab0     
14  wm_operator_call_internal                            wm_event_system.cc     1809 0x16e2d21c     
15  WM_operator_call_py                                  wm_event_system.cc     1886 0x16e30047     
16  pyop_call                                            bpy_operator.cc        249  0x1ad1544e

More Info

From what I can understand, USD Curves importer code (USDCurvesReader::read_custom_data) tries to create a "normal_mode" attribute, which is a built-in one in Blender. USD importer tries to get such attribute as an int32_t, but Blender defines it as CD_PROP_INT8. So the returned attribute data by attributes.lookup_or_add_for_write_span is empty/invalid.

**System Information** Operating system: N/A Graphics card: N/A **Blender Version** Broken: Current `main` Worked: ?? **Short description of error** Running the `io_usd_import` unittest in a debug build fails in current `main` code due to an assert. Backtrace: ``` 4 _BLI_assert_abort BLI_assert.c 51 0x15e1e21e 5 blender::GMutableSpan::typed<int> BLI_generic_span.hh 215 0x1173b997 6 blender::io::usd::copy_primvar_to_blender_attribute usd_attribute_utils.cc 108 0x1bfeaaad 7 blender::io::usd::USDCurvesReader::read_custom_data usd_reader_curve.cc 320 0x1c1cd451 8 blender::io::usd::USDCurvesReader::read_curve_sample usd_reader_curve.cc 288 0x1c1c971b 9 blender::io::usd::USDCurvesReader::read_object_data usd_reader_curve.cc 145 0x1c1c4292 10 blender::io::usd::import_startjob usd_capi_import.cc 346 0x1c07f02a 11 blender::io::usd::USD_import usd_capi_import.cc 538 0x1c07a0a2 12 wm_usd_import_exec io_usd.cc 849 0x1e4b45a3 13 wm_operator_invoke wm_event_system.cc 1586 0x16e6fab0 14 wm_operator_call_internal wm_event_system.cc 1809 0x16e2d21c 15 WM_operator_call_py wm_event_system.cc 1886 0x16e30047 16 pyop_call bpy_operator.cc 249 0x1ad1544e ``` **More Info** From what I can understand, USD Curves importer code (`USDCurvesReader::read_custom_data`) tries to create a `"normal_mode"` attribute, which is a built-in one in Blender. USD importer tries to get such attribute as an `int32_t`, but Blender defines it as `CD_PROP_INT8`. So the returned attribute data by `attributes.lookup_or_add_for_write_span` is empty/invalid.

Bastien Montagne added the

labels 2024-06-01 20:41:58 +02:00

Bastien Montagne added this to the USD project 2024-06-01 20:41:58 +02:00

Bastien Montagne commented

2024-06-01 20:42:51 +02:00

@deadpin @makowalski FYI.