Bug 2016299 is a little helpful but strange it couldn't retrace beyond: StacktraceTop: __strlen_avx2_rtm () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:74 _mesa_hash_string (_key=0x0) at ../src/util/hash_table.c:662 _mesa_hash_table_search (ht=0x55b6f40fefe0, key=0x0) at ../src/util/hash_table.c:348 (anonymous namespace)::interface_block_definitions::lookup (var=0x55b6f6804240, this=0x7ffebdd6ecb0) at ../src/compiler/glsl_types.h:1065 validate_intrastage_interface_blocks (prog=prog@entry=0x55b6f102f7f0, shader_list=shader_list@entry=0x55b6f5d1df50, num_shaders=num_shaders@entry=1) at ../src/compiler/glsl/link_interface_blocks.cpp:353
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