254178 2023-03-20 13:23:01 -0700 [Wasm-GC] Air assertion failure when casting to nullref 2023-03-21 14:33:15 -0700 1 1 1 Unclassified WebKit WebAssembly WebKit Local Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 247394 1 tjc webkit-unassigned webkit-bug-importer oldest_to_newest 1942658 0 tjc 2023-03-20 13:23:01 -0700 An existing test, https://searchfox.org/wubkat/source/JSTests/wasm/gc/casts.js , fails in the wasm-simd, wasm-bbq, and wasm-air configurations when running the run-jsc-stress-tests script. I'm not sure why the test isn't being run with these configurations in CI. The output is: ``` wasm.yaml/wasm/gc/casts.js.wasm-simd: ASSERTION FAILED: isSubtype(src.type(), dst.type()) wasm.yaml/wasm/gc/casts.js.wasm-simd: /home/tjc/WebKit/Source/JavaScriptCore/wasm/WasmAirIRGenerator64.cpp(701) : void JSC::Wasm::AirIRGenerator64::emitMove(const JSC::Wasm::TypedTmp&, const JSC::Wasm::TypedTmp&) ``` and the specific test case causing the error is the first one in `testNullCasts()`: ``` (func (param arrayref) (result nullref) (ref.cast none (local.get 0))) ``` I'll submit a PR. 1942928 1 ews-feeder 2023-03-21 14:32:06 -0700 Committed 261935@main (bd06994b39e7): <https://commits.webkit.org/261935@main> Reviewed commits have been landed. Closing PR #11730 and removing active labels. 1942929 2 webkit-bug-importer 2023-03-21 14:33:15 -0700 <rdar://problem/107021321>