How much Kotlin does it actually run?
Every number below comes from running the official Kotlin
compiler test suite in full — JetBrains/kotlin,
every adapter corpus under compiler/testData/codegen/
(box, boxInline, boxJvm, boxKlib,
boxModernJdk, boxWasmJsInterop, boxWasmWasi,
composeLike, composeLikeBytecodeText) — through minikotlin
unmodified: each .kt compiles to WebAssembly, runs, and
its output is checked against the expected OK. Nothing here is hand-picked.
(The primary development gate is still codegen/box with BAD=0; the headline
percentage includes the harder secondary corpora so the score is not inflated.)
Coverage across the official suite
Each row is a feature area / directory from the official corpora. The bar is the split of supported / not-yet-supported / out-of-scope for that area — filter and sort to explore where the compiler is strong and where the work remains.
Why the rest is not yet run
Declined tests are never silently dropped — each is attributed to a specific unimplemented language feature. These are the top 60 reasons by test count.