Since the new version of Python bundled with Blender requires matrix multiplication using the @ symbol instead of *, the GLTF exporter crashes on some files. This patch simply uses the new operator.
Attached is a file that crashes the exporter when using the GLB exporter. With this patch, it exports without crashing.
(Note that the outputted GLB from this blend file still has some serious problems where many viewers can't import it. The animations don't work even in the viewers that load it successfully. That's a separate issue than this patch though.)
@Thane Brimhall (pennomi) Hello Thane,
We are currently keeping a double compatibility 2.79 / 2.80 on the upstream (https://github.com/KhronosGroup/glTF-Blender-IO), until 2.80 is stable. So the change will be manage on the upstream repo to keep this compatibility. Feel free to open a PR there.