Blocks are not expressions.

Author: robrix

languages/tree-sitter-stack-graphs-java/src/stack-graphs.tsg

@@ -977,13 +977,20 @@ attribute node_symbol = node            => symbol = (source-text node), source_n
   edge @type.lexical_scope -> @this.lexical_scope
 }
 
-(lambda_expression body: (_) @body) @this {
+(lambda_expression) @this {
   node @this.params
+}
 
+(lambda_expression body: (expression) @body) @this {
   edge @body.lexical_scope -> @this.lexical_scope
   edge @body.lexical_scope -> @this.params
 }
 
+(lambda_expression body: (block) @body) @this {
+  edge @body.before_scope -> @this.lexical_scope
+  edge @body.before_scope -> @this.params
+}
+
 (lambda_expression parameters: (_) @param) @this {
   node param
   attr (param) node_definition = @param