chore(deps): Bump sglang from 0.5.2 to 0.5.12.post1 in /single-turn

[dependabot]

Bumps sglang from 0.5.2 to 0.5.12.post1.

Release notes

Sourced from sglang's releases.

v0.5.12.post1 is a stability patch on top of v0.5.12. It cherry-picks 12 fixes — primarily for DeepSeek V4 — onto the release branch.

Bug Fixes

DeepSeek V4

• DSV4-Pro emits garbled text during single-token decode on B200/B300 (fix deep_gemm UE8M0 scale-packing path by ceiling activation scales before packing): #25733
• DSV4 + EAGLE/MTP in disaggregation decode crashes around 2000 requests with a SWA allocator assertion (recycled KV pages kept stale sliding-window mappings): #25805
• DSV4 NSA prefill context-parallel (--enable-nsa-prefill-context-parallel --nsa-prefill-cp-mode round-robin-split) in --disaggregation-mode prefill: scheduler crash at startup: #25396
• DSV4 HiSparse + SGLANG_OPT_USE_COMPRESSOR_V2=1: GSM8K accuracy restored from 0.825 → 0.960: #25646
• DSV4 PD disaggregation now works with pipeline parallelism > 1 (removed stale pp_size=1 assertion): #25771
• DSV4-Flash with --load-format dummy + FlashInfer mxfp4 hits CUDA illegal memory access during CUDA-graph capture (the integer HashTopK.tid2eid lookup table was left uninitialized by dummy load): #25892
• DSV4 HiCache + SGLANG_OPT_CACHE_SWA_TRANSLATION=1 returns stale translation indices after a cache rebuild, causing OOB writes / wrong outputs: #25889

Disaggregation

• [PD][NIXL] Always send aux on is_last; only expect state when truthy: #25699

Other

• Fix missing group arg in get_dp_buffer: #25585

Performance

• DSV4: warm MHC token-count buckets at startup (gated to SGLANG_OPT_DEEPGEMM_HC_PRENORM=1 + SGLANG_OPT_USE_TILELANG_MHC_PRE=1 + hybrid SWA) to eliminate 20–40s cold-bucket forward stalls: #25810
• DSV4-Pro: precompile a DeepGEMM branch for _dispatch_bf16_fp32_backend to cut runtime JIT compile cost: #25860

Dependencies

• Use [cu13] extra for nvidia-cutlass-dsl (default to CUDA 13; required for sm_103 / B300): #25576

All PRs included in this release: sgl-project/sglang@v0.5.12...v0.5.12.post1

Full Changelog: sgl-project/sglang@v0.5.12...v0.5.12.post1

v0.5.12

Highlights

• DeepSeek V4 support: Full inference path for DeepSeek-V4 (#23882), including:

  Day-0 Features: #23882

  • Parallelism: Tensor Parallelism/Expert Parallelism/Context Parallelism/Data Parallel Attention
  • Hardware: Nvidia B300/B200/H200/H100/GB200/GB300, AMD MI35X
  • Prefill-Decode Disaggregation
  • HiSparse for offloading inactive KV cache to CPU memory
  • Reasoning parser and Tool Call Parser
  • DeepGemm and FlashMLA kernels for DeepSeek V4, including MegaMoE

  Post-Day-0 additions:

  • HiCache for DeepSeek V4 under unified Radix Tree [UnifiedTree]: #24691
  • W4A4 MegaMoE kernels — faster speed with negligible accuracy drop: #25052
  • Marlin/FlashInfer W4A8 MoE kernels on Hopper: #24816 #24986
  • Faster V2 fused compression kernels: #24890

... (truncated)

Commits

• 5a15cde [Cherry-pick to release/v0.5.12] fix: fix deepseek v4 CP error (#25396) (#26...
• ff700aa [Cherry-pick to release/v0.5.12] ci: self-heal $GITHUB_PATH/$GITHUB_ENV write...
• d8d60ee [Cherry-pick to release/v0.5.12] [CI] pr-test-extra: add run_all_tests to wor...
• 39f29f0 [CI] release/v0.5.12: fix base-* suite names dragged in by cherry-picks (#26109)
• fd10d3e [Cherry-pick to release/v0.5.12] [Fix] DSV4 cached_loc invalidated when SWA m...
• a573877 [Cherry-pick to release/v0.5.12] Fix SWA double-free in disagg decode with MT...
• 928c0c7 [Cherry-pick to release/v0.5.12] add git gemm warpper for dispatch_bf16_fp32_...
• b18120b [Cherry-pick to release/v0.5.12] fix(dsv4): drop stale pp_size=1 guard for V4...
• ef0fab8 [Cherry-pick to release/v0.5.12] Fix/dsv4 flash eagle dummy ima (#25892) (#26...
• efe5c83 [Cherry-pick to release/v0.5.12] fix deepseek v4 hisparse (#25646) (#26072)
• Additional commits viewable in compare view

[jasonzzj97]

@dependabot rebase