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GetFallbackTexture asserted that the target was 2D or rectangle, so a sampler whose texture could not be resolved took the process down whenever it was any other kind. A multisample sampler reaches exactly that path: its texture is reported incomplete, the resolve falls back, and the assert fires. Sixty direct_state_access multisample cases died that way, and because the abort kills the whole process the harness lost the rest of its chunk with them -- one run needed 63 invocations to get through the suite instead of 3. The fallback is a single-sampled 2D image, so it genuinely cannot stand in for a multisample sampler: that descriptor demands a multisample view, and binding this one is invalid usage rather than a degraded picture. So report that no fallback exists and let the caller decline the draw. An unbound or incomplete sampler is an application-level mistake with a defined GL meaning; it is never a reason to abort. The cases still fail -- multisample textures are not yet complete enough to sample -- but they fail as one reported case each.