[https://nvbugs/6604925][test] Waive flaky TestQwen3_6_35B_A3B::test_nvfp4[TRTLLM] (SIGSEGV on DGX_B200)

[brnguyen2]

What

Waive accuracy/test_llm_api_pytorch.py::TestQwen3_6_35B_A3B::test_nvfp4[TRTLLM] — NVBug https://nvbugs/6604925.

Why

The test intermittently crashes the pytest process with SIGSEGV (exit 139) on DGX_B200 — a real in-process crash, not an assertion or an infra timeout (the infra classifier matched no infra signature). Flake history over the last 14 days: ~1% (9/885 runs) across ~330 unrelated MRs and 5 distinct users, all on DGX_B200 — a main-side flake, not PR-correlated. Fail-fast turns each occurrence into a red pipeline, so it's worth waiving while the crash is root-caused under the NVBug.

Scope (DGX_B200, implicitly)

nvfp4 is Blackwell-only, so this test appears only in B200 test lists (test-db/l0_b200.yml, qa/llm_function_core.txt) and never runs on non-B200 platforms. A plain waives.txt entry (no full:<platform>/ prefix) is therefore already scoped to DGX_B200 by construction — and unlike a full:B200/-prefixed entry, a plain entry reliably applies in the L0 context (DGX_B200-PyTorch-3 stage) where the crash was observed. Only the [TRTLLM] variant is waived; [CUTEDSL] is left running.

Tracked by https://nvbugs/6604925.

Dev Engineer Review

• Added one waiver entry for accuracy/test_llm_api_pytorch.py::TestQwen3_6_35B_A3B::test_nvfp4[TRTLLM].
• The entry references NVBug 6604925.
• The waiver scope is limited to the [TRTLLM] variant.
• The change uses the expected waives.txt format and does not alter public entities.
• The waiver is consistent with the reported intermittent SIGSEGV on DGX_B200.

QA Engineer Review

• Modified files: tests/integration/test_lists/waives.txt.
• Added one waiver entry.
• No test code changed.
• CBTS coverage data is unavailable. Verdict: needs follow-up.

[brnguyen2]

/bot run

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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Review profile: CHILL

Plan: Enterprise

Run ID: 72ec1e19-ad64-4cf7-84e0-858b2e91ff07

📥 Commits

Reviewing files that changed from the base of the PR and between 7647daa and 6b99b34.

📒 Files selected for processing (1)

• tests/integration/test_lists/waives.txt

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Walkthrough

The integration waiver list adds an NVBug-linked skip for the Qwen3.6 35B A3B NVFP4 TRTLLM accuracy test.

Changes

Qwen3.6 NVFP4 test waiver

Layer / File(s)	Summary
Add NVFP4 accuracy test skip tests/integration/test_lists/waives.txt	Adds a SKIP entry for TestQwen3_6_35B_A3B::test_nvfp4[TRTLLM] with NVBug 6604925.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Mergeability Score: ⚪ Minimal · up to 6b99b

This change only adds a narrowly scoped test waiver, and no actionable merge-blocking risk remains after normal checks and review.

Possibly related PRs

• NVIDIA/TensorRT-LLM#17616: Adds an NVBUG-linked skip for a TRTLLM integration test in the same waiver list.
• NVIDIA/TensorRT-LLM#17468: Adds a skip waiver for a failing accuracy test in the same waiver list.
• NVIDIA/TensorRT-LLM#17626: Adds a test skip waiver in the same waiver list.

Suggested reviewers: qijune

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the NVBug, waiver, affected test variant, failure mode, and DGX_B200 platform.
Description check	✅ Passed	The description explains what changed, why the waiver is needed, the failure history, platform scope, and the retained test variant.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[tensorrt-cicd]

PR_Github #65923 [ run ] triggered by Bot. Commit: 6b99b34 Link to invocation

[brnguyen2]

/bot skip --comment "waive-only PR"

[tensorrt-cicd]

PR_Github #65924 [ skip ] triggered by Bot. Commit: 6b99b34 Link to invocation

[tensorrt-cicd]

PR_Github #65923 [ run ] completed with state ABORTED. Commit: 6b99b34

Link to invocation

[tensorrt-cicd]

PR_Github #65924 [ skip ] completed with state SUCCESS. Commit: 6b99b34
Skipping testing for commit 6b99b34

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