[spirv-fuzz] lower_trivial_continues_block: Assertion `!first_instr || instr_is_continue(first_instr)' failed.
This issue may be regarded as a bit pathological, because the attached cases that trigger it involve an enormous number of dynamically dead breaks from loops. But anyway...
The attached archive contains two Amber files. I find that running either one causes Mesa to fail with:
../src/compiler/nir/nir_opt_trivial_continues.c:57: lower_trivial_continu
es_block: Assertion `!first_instr || instr_is_continue(first_instr)' failed.
Device: Mesa DRI Intel(R) HD Graphics 630 (KBL GT2)
Reproduced using 20.2.1 (commit f0498ea8)