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Update vcpkg and CI runners

CI

Status: Open.

Task

#1121 In shader-slang/slangpy;

· skallweitNV opened on Aug 20, 2026

Bundled Slang pin (2026.12) predates the -fp-mode precise NoContraction fix — blocks shader-slang/slang#12285 for SlangPy users

RTR

Status: Open.

Task

#1092 In shader-slang/slangpy;

· nv-slang-bot opened on Aug 5, 2026

·  

Q4 2026 (Fall)

Torch bridge: native and fallback get_signature enforce different buffer-size bounds

Additional TriageIssue requires additional triage from leadsIssue requires additional triage from leads

bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#1091 In shader-slang/slangpy;

· nv-slang-bot opened on Aug 5, 2026

shader_cache_path segfaults on first pipeline creation (Vulkan)

Status: Open.

#1089 In shader-slang/slangpy;

· iveevi opened on Aug 3, 2026

·  

Q3 2026 (Summer)

hlsl_nvapi capability requested unconditionally — breaks all non-HLSL targets under slang#11225

Status: Open.

#1087 In shader-slang/slangpy;

· nv-slang-bot opened on Aug 3, 2026

·  

Q3 2026 (Summer)

Arrays of tensor parameters: incorrect results on Metal, device removal on D3D12

Status: Open.

#1079 In shader-slang/slangpy;

· nv-slang-bot opened on Jul 29, 2026

·  

Q4 2026 (Fall)

Re-enable profiler tests disabled for collector race

CI

Status: Open.

Testing

#1077 In shader-slang/slangpy;

· jkwak-work opened on Jul 27, 2026

·  

Q3 2026 (Summer)

CI: paths-ignore + required matrix checks leaves wheels/docs-only PRs stuck pending forever

Status: Open.

Testing

#1066 In shader-slang/slangpy;

· jhelferty-nv opened on Jul 15, 2026

·  

Q3 2026 (Summer)

sgl_tests exits nonzero after all tests pass (teardown/exit-code flake reddening cross-repo SlangPy Tests check)

bugSomething isn't workingSomething isn't working

CI

Status: Open.

Testing

#1062 In shader-slang/slangpy;

· nv-slang-bot opened on Jul 13, 2026

·  

Q4 2026 (Fall)

[Perf] CUDA target defaults to precise transcendentals — 4x slower than Vulkan's default on the same GPU; downstream_args --use_fast_math silently ignored

Dev Reviewed

Status: Open.

Bug

#1058 In shader-slang/slangpy;

· tekintatar opened on Jul 13, 2026

·  

Q3 2026 (Summer)

[Bug] CUDA illegal memory access (process abort) in backward when a [Differentiable] function has two tensor params and only one requires grad

Status: Open.

Bug

#1056 In shader-slang/slangpy;

· tekintatar opened on Jul 12, 2026

·  

Q3 2026 (Summer)

[Bug] PyTorch autograd hook silently dropped after a no-grad call to the same function (call-data cache ignores requires_grad)

Status: Open.

Bug

#1052 In shader-slang/slangpy;

· tekintatar opened on Jul 12, 2026

·  

Q3 2026 (Summer)