Meeting: Wednesday, September 2, 2026 · 12:00–1:00 PM ET

Facilitator: Kelly Chan / Saleem Abdulrasool

Audience: BCNY, Apple engineers, external community (open to all)

Forum: Swift Forums — Windows

Last call notes: Windows Workgroup — August 19, 2026

1. Welcome & Agenda (~2 min)

• Meeting structure; agendas emailed + posted in forum beforehand
  • Agendas will now be posted to the forums earlier, with Kelly helping, so the wider community has more visibility
• Moving Follow Up and Status items to GitHub board review starting next call
  • Tracking moves from local notes to a GitHub project board to assign owners, see in-flight items, and ping contributors easily

2. Open Forum: Community Issues (~10 min)

• Floor open for new issues
  • No new community issues were captured in today's notes

3. Follow-Up: Open Action Items from August 19 (~5 min)

• Backtracer — Karl: run swift-backtrace manually, post a ProcMon trace to the forum.
  • Ran swift-backtrace on the command line and usage printed as expected
  • Console sample crash produced a backtrace, but Procmon showed the swift-backtracer process never launched
  • Ruled out the unhandled exception handler and confirmed the full trust manifest is set, so launch rights are likely not the cause
  • Next step is a minimal reproducer with an empty window and a crash button, keeping packaging and installer identical
• Concurrency — Daniel: custom actor on a run loop + NWConnection.
  • Still open, no confirmation yet on whether this approach holds
• ICU size — Izzy
  • share Godbolt/forum post on compile-time ICU compression (MB → 238 KB); prefer FoundationEssentials
  • Izzy is working with Hannah to open-license the compile-time ICU compression work
  • Alastair flagged separate Unicode data in the stdlib that could also be trimmed
• Build times — Mike: timing trace filed on GitHub (cc Saleem) + board? Ref: Quick Start doc
  • No update in today's notes
• CAS — Mike: enabled (~20–30% faster)?
  • Still an open question whether CAS helped build times enough to keep
• WASI low-spec — Terry
  • No update in today's notes
• Izzy (Adobe) — #89241: fix for OLE merged, is there anything remaining?
  • OLE auto-link fix is merged and Izzy confirmed it is resolved
• Carl — cross-post Charles's follow-ups to Slack
  • No update in today's notes
• Alastair — DocC PR: first PR in re-review; Goal: ship DocC + re-enable SourceKit-LSP
  • Alastair's PR is awaiting review, with many reviewers likely on holiday
  • Saleem will rebuild Doxygen in CI so the changes land cleanly