From 9214806342e1472d0568df6f16e2f8f977d07e79 Mon Sep 17 00:00:00 2001
From: Marc Vertes <mvertes@free.fr>
Date: Tue, 9 Nov 2021 11:26:11 +0100
Subject: [PATCH] interp: fix populating array of interfaces

Fixes #1308.
---
 _test/issue-1308.go | 27 +++++++++++++++++++++++++++
 interp/run.go       |  2 +-
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 _test/issue-1308.go

diff --git a/_test/issue-1308.go b/_test/issue-1308.go
new file mode 100644
index 000000000..df59ac5ec
--- /dev/null
+++ b/_test/issue-1308.go
@@ -0,0 +1,27 @@
+package main
+
+import "fmt"
+
+type test struct {
+	v interface{}
+	s string
+}
+
+type T struct {
+	name string
+}
+
+func main() {
+	t := []test{
+		{
+			v: []interface{}{
+				T{"hello"},
+			},
+			s: "world",
+		},
+	}
+	fmt.Println(t)
+}
+
+// Output:
+// [{[{hello}] world}]
diff --git a/interp/run.go b/interp/run.go
index 92eeb9916..9d554b922 100644
--- a/interp/run.go
+++ b/interp/run.go
@@ -2588,7 +2588,7 @@ func doComposite(n *node, hasType bool, keyed bool) {
 			values[fieldIndex] = func(*frame) reflect.Value { return reflect.New(rft).Elem() }
 		case isFuncSrc(val.typ):
 			values[fieldIndex] = genValueAsFunctionWrapper(val)
-		case isArray(val.typ) && val.typ.val != nil && isInterfaceSrc(val.typ.val):
+		case isArray(val.typ) && val.typ.val != nil && isInterfaceSrc(val.typ.val) && !isEmptyInterface(val.typ.val):
 			values[fieldIndex] = genValueInterfaceArray(val)
 		case isInterfaceSrc(ft) && !isEmptyInterface(ft):
 			values[fieldIndex] = genValueInterface(val)