Fill in error path and location when a field wrapper fails

core/src/main/scala/caliban/execution/Executor.scala

@@ -313,16 +313,6 @@ object Executor {
     private def calculateMapCapacity(nMappings: Int): Int =
       Math.ceil(nMappings / 0.75d).toInt
 
-    private def effectfulExecutionError(
-      path: List[PathValue],
-      locationInfo: Option[LocationInfo],
-      cause: Cause[Throwable]
-    ): Cause[ExecutionError] =
-      cause.failureOption orElse cause.defects.headOption match {
-        case Some(e: ExecutionError) => Cause.fail(e.copy(path = path.reverse, locationInfo = locationInfo))
-        case other                   => Cause.fail(ExecutionError("Effect failure", path.reverse, locationInfo, other))
-      }
-
     private def fieldInfo(
       field: Field,
       aliasedName: String,
@@ -394,7 +384,19 @@ object Executor {
           wrappers match {
             case Nil             => query
             case wrapper :: tail =>
-              val q = if (isPure && !wrapper.wrapPureValues) query else wrapper.wrap(query, fieldInfo)
+              val q =
+                if (isPure && !wrapper.wrapPureValues) query
+                else
+                  wrapper
+                    .wrap(query, fieldInfo)
+                    .mapErrorCause(e =>
+                      effectfulExecutionError(
+                        PathValue.Key(fieldInfo.name) :: fieldInfo.path,
+                        Some(fieldInfo.details.locationInfo),
+                        e
+                      )
+                    )
+
               loop(q, tail)
           }
         loop(query, fieldWrappers)
@@ -508,6 +510,18 @@ object Executor {
     }
   }
 
+  private def effectfulExecutionError(
+    path: List[PathValue],
+    locationInfo: Option[LocationInfo],
+    cause: Cause[Throwable]
+  ): Cause[ExecutionError] =
+    cause.failureOption orElse cause.defects.headOption match {
+      case Some(e: ExecutionError) if e.path.isEmpty =>
+        Cause.fail(e.copy(path = path.reverse, locationInfo = locationInfo))
+      case Some(e: ExecutionError)                   => Cause.fail(e)
+      case other                                     => Cause.fail(ExecutionError("Effect failure", path.reverse, locationInfo, other))
+    }
+
   // The implicit classes below are for methods that don't exist in Scala 2.12 so we add them as syntax methods instead
   private implicit class EnrichedListOps[+A](private val list: List[A]) extends AnyVal {
     def partitionMap[A1, A2](f: A => Either[A1, A2]): (List[A1], List[A2]) = {

core/src/test/scala/caliban/wrappers/WrappersSpec.scala

@@ -8,7 +8,7 @@ import caliban.TestUtils._
 import caliban.Value.{ IntValue, StringValue }
 import caliban.execution.{ ExecutionRequest, FieldInfo }
 import caliban.introspection.adt.{ __Directive, __DirectiveLocation }
-import caliban.parsing.adt.{ Directive, Document }
+import caliban.parsing.adt.{ Directive, Document, LocationInfo }
 import caliban.schema.Annotations.GQLDirective
 import caliban.schema.{ ArgBuilder, GenericSchema, Schema }
 import caliban.schema.Schema.auto._
@@ -94,6 +94,29 @@ object WrappersSpec extends ZIOSpecDefault {
           counter2    <- ref2.get
         } yield assertTrue(counter1 == 4, counter2 == 1)
       },
+      test("Failures in FieldWrapper have a path and location") {
+        case class Query(a: A)
+        case class A(b: B)
+        case class B(c: Int)
+
+        val wrapper = new FieldWrapper[Any](true) {
+          def wrap[R1 <: Any](
+            query: ZQuery[R1, ExecutionError, ResponseValue],
+            info: FieldInfo
+          ): ZQuery[R1, ExecutionError, ResponseValue] =
+            if (info.name == "c") ZQuery.fail(ExecutionError("error"))
+            else query
+        }
+        for {
+          interpreter <- (graphQL(RootResolver(Query(A(B(1))))) @@ wrapper).interpreter.orDie
+          query        = gqldoc("""{ a { b { c } } }""")
+          result      <- interpreter.execute(query)
+          firstError   = result.errors.head.asInstanceOf[ExecutionError]
+        } yield assertTrue(
+          firstError.path.mkString(",") == """"a","b","c"""",
+          firstError.locationInfo.contains(LocationInfo(11, 1))
+        )
+      },
       test("Max fields") {
         case class A(b: B)
         case class B(c: Int)