-Wmaybe-uninitialized happens in jni_util.c

/home/ysuenaga/git-forked/jdk/src/java.base/share/native/libjava/jni_util.c: In function 'newString646_US':
/home/ysuenaga/git-forked/jdk/src/java.base/share/native/libjava/jni_util.c:487:15: warning: 'buf' may be used uninitialized [-Wmaybe-uninitialized]
  487 | result = (*env)->NewString(env, str1, len);
      | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/ysuenaga/git-forked/jdk/src/java.base/share/native/libjava/jni_util.c:487:15: note: by argument 2 of type 'const jchar *' {aka 'const short unsigned int *'} to 'struct _jobject *(const struct JNINativeInterface_ **, const jchar *, jsize)' {aka 'struct _jobject *(const struct JNINativeInterface_ **, const short unsigned int *, int)'}
/home/ysuenaga/git-forked/jdk/src/java.base/share/native/libjava/jni_util.c:465:11: note: 'buf' declared here
  465 | jchar buf[512];
      | ^~~