Issues

• fork/exec fallback leaks every descriptor into the child when /dev/fd cannot be opened

  swiftlang/swift-subprocess#382 · Filter by author jakepetroules opened on Oct 7, 2026

• Child stdio is clobbered when a child pipe end lands on descriptor 0, 1 or 2

  swiftlang/swift-subprocess#380 · Filter by author jakepetroules opened on Oct 7, 2026

• Linux: child hangs before exec on glibc 2.41+ when another thread is in posix_spawn (abort lock copied by raw clone3)

  bug
  swiftlang/swift-subprocess#375 · Filter by author JimWallace opened on Sep 27, 2026

• Subprocess.run deadlocks permanently on Linux: signal() in the clone3 child is not async-signal-safe

  bug
  swiftlang/swift-subprocess#374 · Filter by author wade-tregaskis opened on Sep 21, 2026

• FileDescriptor deinit fatalErrors ("was not closed") when a child closes its stdin early

  swiftlang/swift-subprocess#367 · Filter by author AdamShare opened on Aug 24, 2026
  3

• Allow spawning a process by file descriptor instead of path

  API Changeenhancement
  swiftlang/swift-subprocess#362 · Filter by author jakepetroules opened on Aug 9, 2026
  1

• FreeBSD CI nondeterministically times out

  swiftlang/swift-subprocess#330 · Filter by author broken-circle opened on Jun 30, 2026

• Test Linux Kernel / al2-5.10 nondeterministically times out

  swiftlang/swift-subprocess#301 · Filter by author broken-circle opened on Jun 6, 2026

• Control over stream writing errors

  bug
  swiftlang/swift-subprocess#265 · Filter by author weissi opened on May 15, 2026
  1

• [Feature] Process replacement API

  API Changeenhancement
  swiftlang/swift-subprocess#251 · Filter by author weissi opened on Apr 27, 2026
  5

  

• API issue: Unit (e.g. bytes/characters/code units) omitted when configuring limits/sizes

  enhancement
  swiftlang/swift-subprocess#248 · Filter by author weissi opened on Apr 27, 2026 · Post 1.0 - Feature Release
  7

  

• [Feature] Retrieve the actual command in case of failure

  enhancement
  swiftlang/swift-subprocess#222 · Filter by author itingliu opened on Feb 26, 2026
  3

  

• [Feature] Support for synchronous use.

  enhancement
  swiftlang/swift-subprocess#207 · Filter by author dabrahams opened on Nov 4, 2025

• [Feature] Make Configuration, Arguments, and Environment more open for testing purposes

  enhancement
  swiftlang/swift-subprocess#206 · Filter by author cmcgee1024 opened on Oct 31, 2025

• Questions: Pty support

  API Changeenhancement
  Feature

  swiftlang/swift-subprocess#175 · Filter by author Ernest0-Production opened on Sep 5, 2025 · Stable 1.0
  4

  

• testDoesNotReapUnrelatedChildProcess nondeterministically hangs

  bug
  swiftlang/swift-subprocess#157 · Filter by author jakepetroules opened on Aug 21, 2025
  4

• [Feature] How do you pipe?

  enhancement
  swiftlang/swift-subprocess#151 · Filter by author DevilDimon opened on Aug 17, 2025 · Post 1.0 - Feature Release
  3

• Investigate Windows CI testPlatformOptionsRunAsUser failure

  Task

  swiftlang/swift-subprocess#128 · Filter by author iCharlesHu opened on Jul 28, 2025 · Post 1.0 - Feature Release
  1

• Hangs when it fails to locate a binary to spawn.

  bug
  swiftlang/swift-subprocess#127 · Filter by author genkernel opened on Jul 27, 2025 · Post 1.0 - Feature Release
  4

• SwiftSubprocess needs a complete CMake build, so it can be depended-on by SwiftBuild & SwiftPM

  enhancementhelp wanted
  swiftlang/swift-subprocess#120 · Filter by author jakepetroules opened on Jul 14, 2025
  5

  

• [Feature] Support "shell" parameter to Executable.file

  enhancement
  swiftlang/swift-subprocess#69 · Filter by author schwa opened on Jun 11, 2025 · Post 1.0 - Feature Release
  1

• [Feature] Add timeout parameter and TimeoutError to run API

  API Changeenhancement
  swiftlang/swift-subprocess#65 · Filter by author newamber opened on Jun 10, 2025 · Post 1.0 - Feature Release
  6