empty tuple bug

Author: Janther

src/slang-nodes/TupleValues.ts

@@ -41,8 +41,9 @@ export class TupleValues implements SlangNode {
 
   print(path: AstPath<TupleValues>, print: PrintFunction): Doc {
     return this.items.length === 1 &&
-      typeof this.items[0].expression!.variant !== 'string' &&
-      isBinaryOperation(this.items[0].expression!.variant)
+      this.items[0].expression &&
+      typeof this.items[0].expression.variant !== 'string' &&
+      isBinaryOperation(this.items[0].expression.variant)
       ? path.map(print, 'items')
       : printSeparatedList(path.map(print, 'items'));
   }

tests/format/Tuples/Tuples.sol

@@ -22,4 +22,9 @@ bytes32 volumeId,
 bytes32 subUnitId,
 bytes32 requestId) = getParamsById(paramsId);
     }
+
+    function emptyTuple() public {
+        attacker.callSender(abi.encodeCall(this.callback, ()));
+    }
+
 }

tests/format/Tuples/__snapshots__/format.test.js.snap

@@ -30,6 +30,11 @@ bytes32 volumeId,
 bytes32 subUnitId,
 bytes32 requestId) = getParamsById(paramsId);
     }
+
+    function emptyTuple() public {
+        attacker.callSender(abi.encodeCall(this.callback, ()));
+    }
+
 }
 
 =====================================output=====================================
@@ -58,6 +63,10 @@ contract Tupples {
             bytes32 requestId
         ) = getParamsById(paramsId);
     }
+
+    function emptyTuple() public {
+        attacker.callSender(abi.encodeCall(this.callback, ()));
+    }
 }
 
 ================================================================================