fix: 修复 throw 未支持静默失败问题

crates/oxide_compiler/src/counter.rs

@@ -195,6 +195,9 @@ impl Compiler {
                 // FD emits LOAD_CONST(BytecodeFunc) + STORE_VAR
                 ctx.projected_pc += 2;
             }
+            Statement::ThrowStatement(_) => {
+                // throw not yet implemented; emit pass will error
+            }
             _ => {}
         }
     }

crates/oxide_compiler/src/emitter.rs

@@ -371,6 +371,7 @@ impl Compiler {
 
                 Ok(None)
             }
+            Statement::ThrowStatement(_) => Err("throw statement not supported".into()),
             _ => Ok(None),
         }
     }

crates/oxide_compiler/src/hash.rs

@@ -116,6 +116,9 @@ fn hash_statement(stmt: &Statement, h: &mut rustc_hash::FxHasher) {
                 }
             }
         }
+        Statement::ThrowStatement(_ts) => {
+            14u8.hash(h);
+        }
         _ => {
             std::mem::discriminant(stmt).hash(h);
         }

crates/oxide_vm/tests/regression_tests.rs

@@ -56,3 +56,11 @@ fn regression_recursion_depth_limit() {
         "vm error: RangeError: Maximum call stack size exceeded"
     );
 }
+
+#[test]
+fn regression_throw_statement_errors() {
+    assert_eq!(
+        eval("throw 'error'"),
+        "compile error: throw statement not supported"
+    );
+}