fix a bug

src/expr.h

@@ -65,6 +65,8 @@ struct CodeEmitContext{
         co->blocks[curr_block_i].end = co->codes.size();
         curr_block_i = co->blocks[curr_block_i].parent;
         if(curr_block_i < 0) FATAL_ERROR();
+        // add a no op here to make block check work
+        emit(OP_NO_OP, BC_NOARG, BC_KEEPLINE);
     }
 
     // clear the expression stack and generate bytecode

src/frame.h

@@ -182,6 +182,11 @@ struct Frame {
         if(_next_ip >= co->codes.size()){
             while(i>=0) i = _exit_block(i);
         }else{
+            // BUG!!!
+            // for i in range(4):
+            //     _ = 0
+            // # if there is no op here, the block check will fail
+            // while i: --i
             const Bytecode& next = co->codes[target];
             while(i>=0 && i!=next.block) i = _exit_block(i);
             if(i!=next.block) throw std::runtime_error("invalid jump");

src/linalg.h

@@ -585,7 +585,7 @@ struct PyMat3x3: Mat3x3{
                 PyVec3& other = _CAST(PyVec3&, args[1]);
                 return VAR_T(PyVec3, self.matmul(other));
             }
-            vm->TypeError("unsupported operand type(s) for @");
+            vm->BinaryOptError("@");
             return vm->None;
         };
 

tests/99_bugs.py

@@ -48,3 +48,9 @@ assert f((
     g(1),
     2
 )) == (1, 2)
+
+def f():
+    for i in range(4):
+        _ = 0
+    while i: --i
+f()