cgen: fix anon_fn in containers (#9077)

vlib/v/gen/c/cgen.v

@@ -1956,6 +1956,7 @@ fn (mut g Gen) gen_assign_stmt(assign_stmt ast.AssignStmt) {
 					g.assign_op = assign_stmt.op
 					g.expr(left)
 					g.is_assign_lhs = false
+					g.is_array_set = false
 					if left is ast.IndexExpr {
 						sym := g.table.get_type_symbol(left.left_type)
 						if sym.kind in [.map, .array] {

vlib/v/tests/anon_fn_in_containers_test.v

@@ -11,3 +11,27 @@ fn test_anon_fn_in_map() {
 	}
 	assert woop['shat']() == 'shoopity shoop'
 }
+
+fn test_anon_fn_in_array() {
+	mut woop := [fn() string {
+		return 'whoopity whoop'
+	}]
+	assert woop[0]() == 'whoopity whoop'
+
+	woop[0] = fn() string {
+		return 'shoopity shoop'
+	}
+	assert woop[0]() == 'shoopity shoop'
+}
+
+fn test_anon_fn_in_fixed_array() {
+	mut woop := [fn() string {
+		return 'whoopity whoop'
+	}]!
+	assert woop[0]() == 'whoopity whoop'
+
+	woop[0] = fn() string {
+		return 'shoopity shoop'
+	}
+	assert woop[0]() == 'shoopity shoop'
+}