gh-104051: fix crash in test_xxtestfuzz with -We (#104052)

Author: iritkatriel

Diff for: Modules/_xxtestfuzz/fuzzer.c

@@ -526,13 +526,20 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
 #if !defined(_Py_FUZZ_ONE) || defined(_Py_FUZZ_fuzz_sre_compile)
     static int SRE_COMPILE_INITIALIZED = 0;
     if (!SRE_COMPILE_INITIALIZED && !init_sre_compile()) {
-        PyErr_Print();
-        abort();
+        if (!PyErr_ExceptionMatches(PyExc_DeprecationWarning)) {
+            PyErr_Print();
+            abort();
+        }
+        else {
+            PyErr_Clear();
+        }
     } else {
         SRE_COMPILE_INITIALIZED = 1;
     }
 
-    rv |= _run_fuzz(data, size, fuzz_sre_compile);
+    if (SRE_COMPILE_INITIALIZED) {
+        rv |= _run_fuzz(data, size, fuzz_sre_compile);
+    }
 #endif
 #if !defined(_Py_FUZZ_ONE) || defined(_Py_FUZZ_fuzz_sre_match)
     static int SRE_MATCH_INITIALIZED = 0;