From 3b41a95fcfae046439dc1fe614e9540b649470a8 Mon Sep 17 00:00:00 2001
From: Marc Vertes <mvertes@free.fr>
Date: Tue, 2 Apr 2024 15:16:51 +0200
Subject: [PATCH] fix: do not panic when assigning to _ (blank) var.

Fix interp.isEmptyInterface to tolerate a nil type.

Fixes #1619.
---
 .gitignore     |  1 +
 _test/op10.go  |  9 +++++++++
 _test/op11.go  | 10 ++++++++++
 interp/type.go |  2 +-
 4 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 _test/op10.go
 create mode 100644 _test/op11.go

diff --git a/.gitignore b/.gitignore
index 3a5347a17..1c088b819 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 .*.swo
 .*.swp
 *.dot
+*.out
 .idea/
 /yaegi
 internal/cmd/extract/extract
diff --git a/_test/op10.go b/_test/op10.go
new file mode 100644
index 000000000..5db580944
--- /dev/null
+++ b/_test/op10.go
@@ -0,0 +1,9 @@
+package main
+
+func main() {
+	_ = 1 + 1
+	println("ok")
+}
+
+// Output:
+// ok
diff --git a/_test/op11.go b/_test/op11.go
new file mode 100644
index 000000000..ab2ecfa3a
--- /dev/null
+++ b/_test/op11.go
@@ -0,0 +1,10 @@
+package main
+
+func main() {
+	a, b := 1, 2
+	_ = a + b
+	println("ok")
+}
+
+// Output:
+// ok
diff --git a/interp/type.go b/interp/type.go
index 2e7c1ffc5..b3220455b 100644
--- a/interp/type.go
+++ b/interp/type.go
@@ -2393,7 +2393,7 @@ func isMap(t *itype) bool  { return t.TypeOf().Kind() == reflect.Map }
 func isPtr(t *itype) bool  { return t.TypeOf().Kind() == reflect.Ptr }
 
 func isEmptyInterface(t *itype) bool {
-	return t.cat == interfaceT && len(t.field) == 0
+	return t != nil && t.cat == interfaceT && len(t.field) == 0
 }
 
 func isGeneric(t *itype) bool {