fix SymbolicInt

Author: gouzil

paddle/fluid/pybind/sot/guards.cc

@@ -141,7 +141,8 @@ bool ShapeMatchGuard::check(PyObject* value) {
     return false;
   }
   for (size_t i = 0; i < shape.size(); ++i) {
-    if (shape[i] <= 0 || shape[i] != expected_[i]) {
+    if (expected_[i] == -1 && shape[i] >= 1) continue;
+    if (shape[i] != expected_[i]) {
       return false;
     }
   }

paddle/fluid/pybind/sot/guards.h

@@ -159,7 +159,11 @@ class ShapeMatchGuard : public GuardBase {
   explicit ShapeMatchGuard(const std::vector<py::object>& shape) {
     expected_.reserve(shape.size());
     for (const auto& s : shape) {
-      expected_.push_back(s.cast<int64_t>());
+      if (py::isinstance<py::int_>(s)) {
+        expected_.push_back(s.cast<int64_t>());
+      } else {
+        expected_.push_back(-1);
+      }
     }
   }