Jairus (JairusSW) · Sep 16, 2026 · Sep 16, 2026 · Sep 16, 2026 · Sep 16, 2026 · Sep 16, 2026
diff --git a/go.mod b/go.mod
@@ -2,4 +2,4 @@ module github.com/wago-org/component-model
 
 go 1.22.0
 
-require github.com/wago-org/wago v0.0.0-20260828131729-c1a5d215cab0
+require github.com/wago-org/wago v0.1.0-beta.8.0.20260916050830-c9ed2455acd9
diff --git a/go.sum b/go.sum
@@ -1,2 +1,2 @@
-github.com/wago-org/wago v0.0.0-20260828131729-c1a5d215cab0 h1:JACyOKg+wp+pnQpu3ApLHDjrKxpN3/5zOFgnk/Xkayo=
-github.com/wago-org/wago v0.0.0-20260828131729-c1a5d215cab0/go.mod h1:odr+6v51s1UDezUBJZrBBujWs/iD1pSHHhAVkb8BTQ0=
+github.com/wago-org/wago v0.1.0-beta.8.0.20260916050830-c9ed2455acd9 h1:+/8b9bvAnyUZPG+YTvGpDwpAV+jpp6+bBBWOrr+8Xco=
+github.com/wago-org/wago v0.1.0-beta.8.0.20260916050830-c9ed2455acd9/go.mod h1:q0pPiPF6W6GZpTXbWwy+GT+r19KHSzB/gRcPUVHyntI=
diff --git a/internal/engine/engine.go b/internal/engine/engine.go
@@ -243,9 +243,10 @@ func (r *runtimeAdapter) instantiateModule(ctx context.Context, c CompiledModule
 				continue
 			}
 			resolvedFuncs[coreImportIdentity{module: spec.Module, name: spec.Name}] = fn
-			var host core.HostFunc
+			var host any
 			if hf, ok := fn.(*hostFunction); ok {
-				host = core.HostFunc(func(caller core.HostModule, params, results []uint64) {
+				host = func(caller core.Caller, call core.HostCall) {
+					params, results := call.ParamSlots(), call.ResultSlots()
 					defer func() {
 						if recovered := recover(); recovered != nil {
 							switch recovered.(type) {
@@ -266,15 +267,16 @@ func (r *runtimeAdapter) instantiateModule(ctx context.Context, c CompiledModule
 					callCtx := context.WithValue(ctx, activeCallerKey{}, caller)
 					hf.fn.Call(callCtx, callerModule{caller: caller}, stack)
 					copy(results, stack)
-				})
+				}
 			} else if wf, ok := fn.(*wasmFunction); ok {
-				host = core.HostFunc(func(caller core.HostModule, params, results []uint64) {
+				host = func(caller core.Caller, call core.HostCall) {
+					params, results := call.ParamSlots(), call.ResultSlots()
 					out, callErr := wf.mod.in.InvokeFromHost(ctx, caller, wf.name, params...)
 					if callErr != nil {
 						panic(core.HostTrap{Err: callErr})
 					}
 					copy(results, out)
-				})
+				}
 			}
 			if host != nil {
 				owner, err := r.funcrefs.New(host, core.FuncSig{

diff --git a/testdata/conformance/wasmtime/xfail.json b/testdata/conformance/wasmtime/xfail.json
@@ -16,12 +16,6 @@
   "async__cancel-starting-subtask-does-not-leak__0000__L9": "component execution semantics for this regression are incomplete",
   "async__drop-host__0000__L5": "component execution semantics for this regression are incomplete",
   "async__drop-waitable-set-stackful__0000__L13": "fixture exceeds the plugin memory authority budget",
-  "async__exceptions__0001__L67": "core exception handling is disabled in Wago",
-  "async__exceptions__0003__L69": "core exception handling is disabled in Wago",
-  "async__exceptions__0006__L143": "core exception handling is disabled in Wago",
-  "async__exceptions__0008__L145": "core exception handling is disabled in Wago",
-  "async__exceptions__0011__L215": "core exception handling is disabled in Wago",
-  "async__exceptions__0013__L217": "core exception handling is disabled in Wago",
   "async__fused__0004__L104/action/L148": "required component-model trap is not enforced",
   "async__future-cancel-write-completed__0000__L5": "complete imported and aliased component type retention is not implemented",
   "async__future-drop-writable-after-notified-drop__0000__L4/action/L160": "this component re-entry shape is not implemented by Wago",
@@ -91,10 +85,6 @@
   "async__wait-forever2__0000__L5": "fixture exceeds the plugin memory authority budget",
   "async__yield-when-cancelled__0000__L6/action/L97": "this component re-entry shape is not implemented by Wago",
   "error-context-trap-in-post-return__0001__L45/action/L46": "required component-model trap is not enforced",
-  "exceptions__0000__L22": "core exception handling is disabled in Wago",
-  "exceptions__0002__L54": "core exception handling is disabled in Wago",
-  "exceptions__0004__L90": "core exception handling is disabled in Wago",
-  "exceptions__0006__L132": "core exception handling is disabled in Wago",
   "exceptions__0008__L168": "core exception handling is disabled in Wago",
   "fixed_length_lists__0000__L18": "114: decode component: nested component[0]: type section: type[0]: instancedecl[0]: unsupported (M1): defvaltype tag 0x67",
   "gc__empty__0000__L8": "component core-type sections are not implemented",
@@ -103,7 +93,6 @@
   "implements__0000__L3": "extern-name attributes are not implemented",
   "import__0000__L1": "complete component semantic validation is not implemented",
   "import__0001__L7": "114: instantiation succeeded, want trap containing \"expected instance found func\"",
-  "instance__0003__L34": "this component re-entry shape is not implemented by Wago",
   "instance__0006__L104": "component execution semantics for this regression are incomplete",
   "instance__0007__L130": "component execution semantics for this regression are incomplete",
   "instance__0008__L161": "component execution semantics for this regression are incomplete",

diff --git a/testdata/conformance/wasmtime/xfail_windows.json b/testdata/conformance/wasmtime/xfail_windows.json
@@ -1,4 +1,14 @@
 {
-  "async__intra-streams__0004__L118": "Wago's Windows backend does not yet implement core multi-memory",
+	"async__exceptions__0001__L67": "Wago's Windows backend does not yet implement core exception handling",
+	"async__exceptions__0003__L69": "Wago's Windows backend does not yet implement core exception handling",
+	"async__exceptions__0006__L143": "Wago's Windows backend does not yet implement core exception handling",
+	"async__exceptions__0008__L145": "Wago's Windows backend does not yet implement core exception handling",
+	"async__exceptions__0011__L215": "Wago's Windows backend does not yet implement core exception handling",
+	"async__exceptions__0013__L217": "Wago's Windows backend does not yet implement core exception handling",
+	"exceptions__0000__L22": "Wago's Windows backend does not yet implement core exception handling",
+	"exceptions__0002__L54": "Wago's Windows backend does not yet implement core exception handling",
+	"exceptions__0004__L90": "Wago's Windows backend does not yet implement core exception handling",
+	"exceptions__0006__L132": "Wago's Windows backend does not yet implement core exception handling",
+	"async__intra-streams__0004__L118": "Wago's Windows backend does not yet implement core multi-memory",
   "async__intra-streams__0006__L179": "Wago's Windows backend does not yet implement core multi-memory"
 }
diff --git a/testdata/conformance/xfail.json b/testdata/conformance/xfail.json
@@ -151,7 +151,6 @@
   "binary__binary__0117__L1465": "complete component semantic validation is not implemented",
   "linking__link-time-virtualization__0000__L2": "component core-type sections are not implemented",
   "linking__shared-everything-dynamic-linking__0000__L4": "component core-type sections are not implemented",
-  "linking__shared-everything-dynamic-linking__0010__L152": "component re-entry leaves a host funcref importer live during teardown",
   "linking__shared-everything-dynamic-linking__0010__L152/action/L191": "this component re-entry shape is not implemented by Wago",
   "linking__tags__0000__L7": "core exception handling is disabled in Wago",
   "linking__tags__0003__L36": "core exception handling is disabled in Wago",
Original file line number	Diff line number	Diff line change
Expand Up		@@ -2,4 +2,4 @@ module github.com/wago-org/component-model

		go 1.22.0

		require github.com/wago-org/wago v0.0.0-20260828131729-c1a5d215cab0
		require github.com/wago-org/wago v0.1.0-beta.8.0.20260916050830-c9ed2455acd9