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Augment CFSocketDataEventArgs to take and store a CFData, and if instantiated
this way, then compute the byte array for the Data property from the CFData
instance on demand instead of when instantiating the CFSocketDataEventArgs.
This way any problems when creating the byte array can be handled in user
code, instead of crashing the process because it occurs in a callback on a
background thread where the app developer can't handle the exception.

Fixes #18551.

rolfbjarne and others added 2 commits October 8, 2025 12:45
…nCallback.

Augment CFSocketDataEventArgs to take and store a CFData, and if instantiated
this way, then compute the byte array for the Data property from the CFData
instance on demand instead of when instantiating the CFSocketDataEventArgs.
This way any problems when creating the byte array can be handled in user
code, instead of crashing the process because it occurs in a callback on a
background thread where the app developer can't handle the exception.

Fixes #18551.
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✅ [CI Build #af2c078] Build passed (Build packages) ✅

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✅ [PR Build #af2c078] Build passed (Detect API changes) ✅

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@rolfbjarne rolfbjarne enabled auto-merge (squash) October 8, 2025 11:27
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✅ API diff for current PR / commit

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Generator Diff: vsdrops (html) vsdrops (raw diff) gist (raw diff) - Please review changes)

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✅ [CI Build #af2c078] Build passed (Build macOS tests) ✅

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💻 [CI Build #af2c078] Tests on macOS X64 - Mac Sonoma (14) passed 💻

All tests on macOS X64 - Mac Sonoma (14) passed.

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💻 [CI Build #af2c078] Tests on macOS M1 - Mac Monterey (12) passed 💻

All tests on macOS M1 - Mac Monterey (12) passed.

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💻 [CI Build #af2c078] Tests on macOS M1 - Mac Ventura (13) passed 💻

All tests on macOS M1 - Mac Ventura (13) passed.

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💻 [CI Build #af2c078] Tests on macOS arm64 - Mac Tahoe (26) passed 💻

All tests on macOS arm64 - Mac Tahoe (26) passed.

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💻 [CI Build #af2c078] Tests on macOS arm64 - Mac Sequoia (15) passed 💻

All tests on macOS arm64 - Mac Sequoia (15) passed.

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🚀 [CI Build #af2c078] Test results 🚀

Test results

✅ All tests passed on VSTS: test results.

🎉 All 117 tests passed 🎉

Tests counts

✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (MacCatalyst): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (macOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 2 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 4 tests passed. Html Report (VSDrops) Download
✅ generator: All 5 tests passed. Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 4 tests passed. [attempt 2] Html Report (VSDrops) Download
✅ introspection: All 6 tests passed. [attempt 2] Html Report (VSDrops) Download
✅ linker: All 44 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 8 tests passed. Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 11 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 9 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 8 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ windows: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 4 tests passed. Html Report (VSDrops) Download
✅ xtro: All 1 tests passed. Html Report (VSDrops) Download

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Hash: af2c07878d154cf1eb253298fcb8d2ab37d0b1d2 [PR build]

@rolfbjarne rolfbjarne merged commit 691752e into main Oct 8, 2025
41 checks passed
@rolfbjarne rolfbjarne deleted the dev/rolf/issue-18551-improve-cfsocket-oncallback branch October 8, 2025 19:18
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Unhandled Null Exception in CFData

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