[mark14wu]

Summary

When the pointer of a load or store depends on loaded values, the sanitizer concretizes it. For a 2-D pointer tile, such as

rows = tl.load(idx_ptr + start_n + offs_n)
v = tl.load(v_ptr + rows[:, None] * D + offs_d[None, :])

_collect_tensor_base returns a nested list of addresses. SymbolicClient._resolve_tensor handled only a flat list, so the sanitizer crashed with

TypeError: int() argument must be a string, a bytes-like object or a real number, not 'list'

This PR flattens nested candidates before they are matched against the registered tensors. The flat-list and scalar cases are unchanged.

Tests

• New test_sanitizer_resolves_2d_pointer_tile_from_loaded_indices in tests/end_to_end/test_sanitizer.py, with an in-bounds case (no record) and a case with one loaded row index past the end of v (record reported). Both cases fail with the TypeError above without the fix. Because both cases launch the same kernel with the same signature, the test clears _fn_symbolic_cache_set so that the second case is analyzed rather than replayed.
• pytest tests/: 368 passed, 6 skipped (Python 3.12, Triton 3.8.0, tilelens installed in editable mode with its CLIs on PATH).
• ruff check and ruff format --check (v0.1.9, as pinned in .pre-commit-config.yaml) pass on both changed files.

🤖 Generated with Claude Code

https://claude.ai/code/session_016HMpCLXdUVNfMbJTj8aHE2

[github-actions]

Performance Benchmark

Benchmark	main (min)	PR (min)	Change	Samples
gemm	N/A	N/A	N/A	0 / 0
gemm_oob	N/A	N/A	N/A	0 / 0
indirect_load	N/A	N/A	N/A	0 / 0
nested_loop	N/A	N/A	N/A	0 / 0
block_pointer_loop_advance	N/A	N/A	N/A	0 / 0
liger_jsd	N/A	N/A	N/A	0 / 0
flaggems_layernorm	N/A	N/A	N/A	0 / 0
swiglu	0.162s	0.162s	-0.0%	20 / 20
cross_entropy	N/A	N/A	N/A	0 / 0
fused_linear_jsd	N/A	N/A	N/A	0 / 0
Total	N/A	N/A	N/A	N/A

Iterations: 1 warmup + 20 measured
Samples are shown as main / PR; long pytest benchmarks may use fewer samples.