GHC status report

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GHC moves on a six‑month cadence with six minor fixes since 9.4.1, 9.6 in March and 9.8 due around October, 9.10 forking in January; notable additions include primitive delimited continuations for effect handlers, a tractable subcase of higher‑order matching so 9.8 implements fusion for concatMap, and 40% faster Template Haskell by compiling interface core to bytecode instead of linking. Record‑update desugaring before typecheck, per‑allocation info‑table provenance, non‑moving GC pause reductions, structured error codes with a searchable index, stack snapshots for traces, and cross‑compilation/wasm work are all in progress.

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" chapters (17)

1. 0:00Introduction
2. 4:14Compiler Roundup
3. 6:53Quality of Life Improvement
4. 9:29Web Assembly
5. 11:25Comp Runtime
6. 15:25Error Codes
7. 17:10Concat Map Optimization
8. 24:45Dependent Types
9. 29:39Parallelism
10. 32:24StSt
11. 35:36Groundwork
12. 36:26Fork the tree
13. 41:20Heap profiling
14. 45:58IO Manager
15. 46:44Linear Types
16. 47:41Other
17. 55:40Hol Foundation