fix pypy tests on windows

Author: davidhewitt

src/recursion_guard.rs

@@ -20,7 +20,15 @@ pub struct RecursionGuard {
 }
 
 // A hard limit to avoid stack overflows when rampant recursion occurs
-pub const RECURSION_GUARD_LIMIT: u16 = if cfg!(target_family = "wasm") { 50 } else { 255 };
+pub const RECURSION_GUARD_LIMIT: u16 = if cfg!(target_family = "wasm") || cfg!(all(target_os = "windows", PyPy)) {
+    // wasm and windows PyPy have very limited stack sizes
+    50
+} else if cfg!(PyPy) {
+    // PyPy in general has more restricted stack space
+    123
+} else {
+    255
+};
 
 impl RecursionGuard {
     // insert a new id into the set, return whether the set already had the id in it

tests/benchmarks/test_micro_benchmarks.py

@@ -274,7 +274,7 @@ def definition_model_data():
     data = {'width': -1}
 
     _data = data
-    for i in range(100):
+    for i in range(pydantic_core._pydantic_core._recursion_limit - 2):
         _data['branch'] = {'width': i}
         _data = _data['branch']
     return data
@@ -1189,14 +1189,15 @@ def f(v: int, info: core_schema.FieldValidationInfo) -> int:
         return v + 1
 
     schema: core_schema.CoreSchema = core_schema.int_schema()
+    limit = pydantic_core._pydantic_core._recursion_limit - 3
 
-    for _ in range(100):
+    for _ in range(limit):
         schema = core_schema.field_after_validator_function(f, 'x', schema)
 
     schema = core_schema.typed_dict_schema({'x': core_schema.typed_dict_field(schema)})
 
     v = SchemaValidator(schema)
     payload = {'x': 0}
-    assert v.validate_python(payload) == {'x': 100}
+    assert v.validate_python(payload) == {'x': limit}
 
     benchmark(v.validate_python, payload)