diff --git a/sjsonnet/src/sjsonnet/Error.scala b/sjsonnet/src/sjsonnet/Error.scala
index 71e0f2e2..ed25709b 100644
--- a/sjsonnet/src/sjsonnet/Error.scala
+++ b/sjsonnet/src/sjsonnet/Error.scala
@@ -54,7 +54,8 @@ class Error(msg: String, val stack: List[Error.Frame] = Nil, underlying: Option[
   private def isApplyOrBuiltin(expr: Expr): Boolean = expr match {
     case _: Expr.Apply | _: Expr.Apply0 | _: Expr.Apply1 | _: Expr.Apply2 | _: Expr.Apply3 |
         _: Expr.ApplyBuiltin | _: Expr.ApplyBuiltin0 | _: Expr.ApplyBuiltin1 |
-        _: Expr.ApplyBuiltin2 | _: Expr.ApplyBuiltin3 | _: Expr.ApplyBuiltin4 =>
+        _: Expr.ApplyBuiltin2 | _: Expr.ApplyBuiltin3 | _: Expr.ApplyBuiltin4 | _: Expr.Comp |
+        _: Expr.ObjBody.ObjComp =>
       true
     case _ => false
   }
diff --git a/sjsonnet/src/sjsonnet/Expr.scala b/sjsonnet/src/sjsonnet/Expr.scala
index cad2092d..e0710ccf 100644
--- a/sjsonnet/src/sjsonnet/Expr.scala
+++ b/sjsonnet/src/sjsonnet/Expr.scala
@@ -343,6 +343,7 @@ object Expr {
   final case class Comp(pos: Position, value: Expr, first: ForSpec, rest: Array[CompSpec])
       extends Expr {
     final override private[sjsonnet] def tag = ExprTags.Comp
+    override def exprErrorString: String = "array comprehension"
   }
   final case class ObjExtend(pos: Position, base: Expr, ext: ObjBody) extends Expr {
     final override private[sjsonnet] def tag = ExprTags.ObjExtend
@@ -371,6 +372,7 @@ object Expr {
         rest: List[CompSpec])
         extends ObjBody {
       final override private[sjsonnet] def tag = ExprTags.`ObjBody.ObjComp`
+      override def exprErrorString: String = "object comprehension"
       override def toString: String =
         s"ObjComp($pos, ${arrStr(preLocals)}, $key, $value, ${arrStr(postLocals)}, $first, $rest)"
     }
diff --git a/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_empty_string.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_empty_string.jsonnet.golden
index 29fc6f66..410cd8c1 100644
--- a/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_empty_string.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_empty_string.jsonnet.golden
@@ -1,3 +1,4 @@
 sjsonnet.Error: In comprehension, can only iterate over array, not string
+    at [array comprehension].(array_comp_try_iterate_over_empty_string.jsonnet:1:4)
     at [<root>].(array_comp_try_iterate_over_empty_string.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_obj.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_obj.jsonnet.golden
index 78e1ac3e..8b9b790b 100644
--- a/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_obj.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_obj.jsonnet.golden
@@ -1,3 +1,4 @@
 sjsonnet.Error: In comprehension, can only iterate over array, not object
+    at [array comprehension].(array_comp_try_iterate_over_obj.jsonnet:1:4)
     at [<root>].(array_comp_try_iterate_over_obj.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_string.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_string.jsonnet.golden
index 81ac98d5..02935da9 100644
--- a/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_string.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/array_comp_try_iterate_over_string.jsonnet.golden
@@ -1,3 +1,4 @@
 sjsonnet.Error: In comprehension, can only iterate over array, not string
+    at [array comprehension].(array_comp_try_iterate_over_string.jsonnet:1:4)
     at [<root>].(array_comp_try_iterate_over_string.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/go_test_suite/arrcomp_if6.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/arrcomp_if6.jsonnet.golden
index 88288aad..79e7448e 100644
--- a/sjsonnet/test/resources/go_test_suite/arrcomp_if6.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/arrcomp_if6.jsonnet.golden
@@ -1,3 +1,4 @@
 sjsonnet.Error: x
+    at [array comprehension].(arrcomp_if6.jsonnet:1:20)
     at [<root>].(arrcomp_if6.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/go_test_suite/arrcomp_if7.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/arrcomp_if7.jsonnet.golden
index fb967e45..923676ef 100644
--- a/sjsonnet/test/resources/go_test_suite/arrcomp_if7.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/arrcomp_if7.jsonnet.golden
@@ -1,3 +1,4 @@
 sjsonnet.Error: Condition must be boolean, got number
+    at [array comprehension].(arrcomp_if7.jsonnet:1:23)
     at [<root>].(arrcomp_if7.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/go_test_suite/object_comp_duplicate.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/object_comp_duplicate.jsonnet.golden
index a944128d..f88daa16 100644
--- a/sjsonnet/test/resources/go_test_suite/object_comp_duplicate.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/object_comp_duplicate.jsonnet.golden
@@ -1,3 +1,3 @@
-sjsonnet.Error: Duplicate key x in evaluated object comprehension.
+sjsonnet.Error: [object comprehension] Duplicate key x in evaluated object comprehension.
     at [<root>].(object_comp_duplicate.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/go_test_suite/object_comp_err_index.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/object_comp_err_index.jsonnet.golden
index 6736b138..e4f377c7 100644
--- a/sjsonnet/test/resources/go_test_suite/object_comp_err_index.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/object_comp_err_index.jsonnet.golden
@@ -1,3 +1,4 @@
 sjsonnet.Error: xxx
+    at [object comprehension].(object_comp_err_index.jsonnet:1:4)
     at [<root>].(object_comp_err_index.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/go_test_suite/object_comp_int_index.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/object_comp_int_index.jsonnet.golden
index cdf28e06..0a733a79 100644
--- a/sjsonnet/test/resources/go_test_suite/object_comp_int_index.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/object_comp_int_index.jsonnet.golden
@@ -1,3 +1,3 @@
-sjsonnet.Error: Field name must be string or null, not number
+sjsonnet.Error: [object comprehension] Field name must be string or null, not number
     at [<root>].(object_comp_int_index.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/go_test_suite/object_comp_try_iterate_over_obj.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/object_comp_try_iterate_over_obj.jsonnet.golden
index 42939c2c..7edbe94e 100644
--- a/sjsonnet/test/resources/go_test_suite/object_comp_try_iterate_over_obj.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/object_comp_try_iterate_over_obj.jsonnet.golden
@@ -1,3 +1,4 @@
 sjsonnet.Error: In comprehension, can only iterate over array, not object
+    at [object comprehension].(object_comp_try_iterate_over_obj.jsonnet:1:10)
     at [<root>].(object_comp_try_iterate_over_obj.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/go_test_suite/object_comp_try_iterate_over_string.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/object_comp_try_iterate_over_string.jsonnet.golden
index 8530c9ed..3bd42f25 100644
--- a/sjsonnet/test/resources/go_test_suite/object_comp_try_iterate_over_string.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/object_comp_try_iterate_over_string.jsonnet.golden
@@ -1,3 +1,4 @@
 sjsonnet.Error: In comprehension, can only iterate over array, not string
+    at [object comprehension].(object_comp_try_iterate_over_string.jsonnet:1:10)
     at [<root>].(object_comp_try_iterate_over_string.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/test_suite/error.comprehension_spec_object.jsonnet.golden b/sjsonnet/test/resources/test_suite/error.comprehension_spec_object.jsonnet.golden
index 31946dc8..e7e41956 100644
--- a/sjsonnet/test/resources/test_suite/error.comprehension_spec_object.jsonnet.golden
+++ b/sjsonnet/test/resources/test_suite/error.comprehension_spec_object.jsonnet.golden
@@ -1,3 +1,4 @@
 sjsonnet.Error: In comprehension, can only iterate over array, not object
+    at [array comprehension].(error.comprehension_spec_object.jsonnet:17:4)
     at [<root>].(error.comprehension_spec_object.jsonnet:17:1)
 
diff --git a/sjsonnet/test/resources/test_suite/error.comprehension_spec_object2.jsonnet.golden b/sjsonnet/test/resources/test_suite/error.comprehension_spec_object2.jsonnet.golden
index 59e68ab6..693f651f 100644
--- a/sjsonnet/test/resources/test_suite/error.comprehension_spec_object2.jsonnet.golden
+++ b/sjsonnet/test/resources/test_suite/error.comprehension_spec_object2.jsonnet.golden
@@ -1,3 +1,4 @@
 sjsonnet.Error: In comprehension, can only iterate over array, not object
+    at [object comprehension].(error.comprehension_spec_object2.jsonnet:17:13)
     at [<root>].(error.comprehension_spec_object2.jsonnet:17:1)
 
diff --git a/sjsonnet/test/src/sjsonnet/EvaluatorTests.scala b/sjsonnet/test/src/sjsonnet/EvaluatorTests.scala
index 6e692d73..8a58d070 100644
--- a/sjsonnet/test/src/sjsonnet/EvaluatorTests.scala
+++ b/sjsonnet/test/src/sjsonnet/EvaluatorTests.scala
@@ -215,7 +215,7 @@ object EvaluatorTests extends TestSuite {
       ) ==> ujson.Obj("x" -> ujson.Num(3))
       // Regression test for a bug in handling of non-string field names:
       evalErr("{[k]: k for k in [1]}", useNewEvaluator = useNewEvaluator) ==>
-      """sjsonnet.Error: Field name must be string or null, not number
+      """sjsonnet.Error: [object comprehension] Field name must be string or null, not number
           |at [<root>].(:1:1)""".stripMargin
       // Basic function support:
       eval(
@@ -642,7 +642,7 @@ object EvaluatorTests extends TestSuite {
         """{ [x]: x for x in ["A", "A"]}""",
         useNewEvaluator = useNewEvaluator
       ) ==>
-      """sjsonnet.Error: Duplicate key A in evaluated object comprehension.
+      """sjsonnet.Error: [object comprehension] Duplicate key A in evaluated object comprehension.
         |at [<root>].(:1:1)""".stripMargin
     }
     test("givenDuplicateFieldsInIndirectListComprehension_expectFailure") {
@@ -652,7 +652,7 @@ object EvaluatorTests extends TestSuite {
           |{ [x.a]: x for x in [y, z]}""".stripMargin,
         useNewEvaluator = useNewEvaluator
       ) ==>
-      """sjsonnet.Error: Duplicate key A in evaluated object comprehension.
+      """sjsonnet.Error: [object comprehension] Duplicate key A in evaluated object comprehension.
         |at [<root>].(:1:7)""".stripMargin
     }
     test("functionEqualsNull") {