Mark PyPattern, PyMatch as ThreadSafe

vm/src/stdlib/re.rs

@@ -13,7 +13,7 @@ use crate::function::{Args, OptionalArg};
 use crate::obj::objint::{PyInt, PyIntRef};
 use crate::obj::objstr::{PyString, PyStringRef};
 use crate::obj::objtype::PyClassRef;
-use crate::pyobject::{PyClassImpl, PyObjectRef, PyResult, PyValue, TryFromObject};
+use crate::pyobject::{PyClassImpl, PyObjectRef, PyResult, PyValue, ThreadSafe, TryFromObject};
 use crate::vm::VirtualMachine;
 
 #[pyclass(name = "Pattern")]
@@ -23,6 +23,8 @@ struct PyPattern {
     pattern: String,
 }
 
+impl ThreadSafe for PyPattern {}
+
 const IGNORECASE: usize = 2;
 const LOCALE: usize = 4;
 const MULTILINE: usize = 8;
@@ -75,6 +77,8 @@ struct PyMatch {
     captures: Vec<Option<(usize, usize)>>,
 }
 
+impl ThreadSafe for PyMatch {}
+
 impl fmt::Debug for PyMatch {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "Match()")