libjvm-java: handle null string

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libjvm-java.c b/src/libjvm-java.c
index baa3e29..fb1d81b 100644
--- a/src/libjvm-java.c
+++ b/src/libjvm-java.c
@@ -168,7 +168,7 @@ java_lang_String_getBytes(JNIEnv *env, jobject object, va_list args)
 {
    assert(env && object);
    const char *utf = (*env)->GetStringUTFChars(env, object, NULL);
-   const size_t len = strlen(utf);
+   const size_t len = (utf ? strlen(utf) : 0);
    jbyteArray bytes = (*env)->NewByteArray(env, len);
    (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)utf);
    return bytes;