The value we pass to spvContextCreate() is not SPV_ENV_UNIVERSAL_1_3, which is what we use in GLSLPostProcessor. Also add a call to spvValidateBinary(), which would have caught this oversight.
Matinfo
matinfo lists the content of a compiled material as output by matc. This tool is meant to be
used for debug purpose only.
Usage
$ matinfo [options] <material file>