Fix error descriptions Embedded Swift compatibility

MaxDesiatov · MaxDesiatov · commit 43f0b3e4be84 · 2026-06-09T20:24:20.000+01:00
The BridgeJS generator emits `JSError(message: String(describing: error))` for throwing `@JS` exports, but `String.init(describing:)` is unavailable in Embedded Swift, so embedded Wasm builds of any package with a throwing export fail. The caught error is statically a `JSException` with a stored `description`, so the generated glue now uses `error.description` for identical output. Snapshots regenerated.
diff --git a/Plugins/BridgeJS/Sources/BridgeJSCore/ExportSwift.swift b/Plugins/BridgeJS/Sources/BridgeJSCore/ExportSwift.swift
@@ -453,7 +453,7 @@ public class ExportSwift {
                                 _swift_js_throw(Int32(bitPattern: $0.id))
                             }
                         } else {
-                            let jsError = JSError(message: String(describing: error))
+                            let jsError = JSError(message: error.description)
                             withExtendedLifetime(jsError.jsObject) {
                                 _swift_js_throw(Int32(bitPattern: $0.id))
                             }
diff --git a/Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/BridgeJSCodegenTests/EnumNamespace.Global.swift b/Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/BridgeJSCodegenTests/EnumNamespace.Global.swift
@@ -117,7 +117,7 @@ public func _bjs_Services_Graph_GraphOperations_static_validate(_ graphId: Int32
                 _swift_js_throw(Int32(bitPattern: $0.id))
             }
         } else {
-            let jsError = JSError(message: String(describing: error))
+            let jsError = JSError(message: error.description)
             withExtendedLifetime(jsError.jsObject) {
                 _swift_js_throw(Int32(bitPattern: $0.id))
             }
diff --git a/Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/BridgeJSCodegenTests/EnumNamespace.swift b/Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/BridgeJSCodegenTests/EnumNamespace.swift
@@ -117,7 +117,7 @@ public func _bjs_Services_Graph_GraphOperations_static_validate(_ graphId: Int32
                 _swift_js_throw(Int32(bitPattern: $0.id))
             }
         } else {
-            let jsError = JSError(message: String(describing: error))
+            let jsError = JSError(message: error.description)
             withExtendedLifetime(jsError.jsObject) {
                 _swift_js_throw(Int32(bitPattern: $0.id))
             }
diff --git a/Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/BridgeJSCodegenTests/ImportedTypeInExportedInterface.swift b/Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/BridgeJSCodegenTests/ImportedTypeInExportedInterface.swift
@@ -59,7 +59,7 @@ public func _bjs_makeFoo() -> Int32 {
                 _swift_js_throw(Int32(bitPattern: $0.id))
             }
         } else {
-            let jsError = JSError(message: String(describing: error))
+            let jsError = JSError(message: error.description)
             withExtendedLifetime(jsError.jsObject) {
                 _swift_js_throw(Int32(bitPattern: $0.id))
             }
diff --git a/Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/BridgeJSCodegenTests/Throws.swift b/Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/BridgeJSCodegenTests/Throws.swift
@@ -10,7 +10,7 @@ public func _bjs_throwsSomething() -> Void {
                 _swift_js_throw(Int32(bitPattern: $0.id))
             }
         } else {
-            let jsError = JSError(message: String(describing: error))
+            let jsError = JSError(message: error.description)
             withExtendedLifetime(jsError.jsObject) {
                 _swift_js_throw(Int32(bitPattern: $0.id))
             }

Original file line number	Diff line number	Diff line change
`@@ -453,7 +453,7 @@ public class ExportSwift {`
`453`	`453`	`_swift_js_throw(Int32(bitPattern: $0.id))`
`454`	`454`	`}`
`455`	`455`	`} else {`
`456`		`- let jsError = JSError(message: String(describing: error))`
	`456`	`+ let jsError = JSError(message: error.description)`
`457`	`457`	`withExtendedLifetime(jsError.jsObject) {`
`458`	`458`	`_swift_js_throw(Int32(bitPattern: $0.id))`
`459`	`459`	`}`
Original file line number	Diff line number	Diff line change
`@@ -117,7 +117,7 @@ public func _bjs_Services_Graph_GraphOperations_static_validate(_ graphId: Int32`
`117`	`117`	`_swift_js_throw(Int32(bitPattern: $0.id))`
`118`	`118`	`}`
`119`	`119`	`} else {`
`120`		`- let jsError = JSError(message: String(describing: error))`
	`120`	`+ let jsError = JSError(message: error.description)`
`121`	`121`	`withExtendedLifetime(jsError.jsObject) {`
`122`	`122`	`_swift_js_throw(Int32(bitPattern: $0.id))`
`123`	`123`	`}`
Original file line number	Diff line number	Diff line change
`@@ -59,7 +59,7 @@ public func _bjs_makeFoo() -> Int32 {`
`59`	`59`	`_swift_js_throw(Int32(bitPattern: $0.id))`
`60`	`60`	`}`
`61`	`61`	`} else {`
`62`		`- let jsError = JSError(message: String(describing: error))`
	`62`	`+ let jsError = JSError(message: error.description)`
`63`	`63`	`withExtendedLifetime(jsError.jsObject) {`
`64`	`64`	`_swift_js_throw(Int32(bitPattern: $0.id))`
`65`	`65`	`}`
Original file line number	Diff line number	Diff line change
`@@ -10,7 +10,7 @@ public func _bjs_throwsSomething() -> Void {`
`10`	`10`	`_swift_js_throw(Int32(bitPattern: $0.id))`
`11`	`11`	`}`
`12`	`12`	`} else {`
`13`		`- let jsError = JSError(message: String(describing: error))`
	`13`	`+ let jsError = JSError(message: error.description)`
`14`	`14`	`withExtendedLifetime(jsError.jsObject) {`
`15`	`15`	`_swift_js_throw(Int32(bitPattern: $0.id))`
`16`	`16`	`}`