Issue with GM through JNI

Hi GraphicsMagick masters,

In my program I am using GM 1.3.26 through JNI (Java Native Interface).
Unfortunately, it seems initializing GM by calling "
InitializeMagick(nullptr)" will corrupt the heap (or stack) and crash my
Java program.

Here is a snippet of my main function. GMImage.initContext is a static
function that only calls InitializeMagick(nullptr):

public static void main(String[] args) throws Exception {
    try {
      GmImage.initContext();

      ImageTranscoderConfig config = new ImageTranscoderConfig();

      final OstrichStatsReceiver statsReceiver = new
OstrichStatsReceiver(Stats.get(""));

      s3Utils = new S3Utils(new AmazonS3Client());

At the line "s3Utils = ", the program will crash due to segfault inside
JVM.

I have tried replacing GM JNI stuff with ImageMagick JNI, and with IM, the
program functions correctly. So I think it might not be the issue with my
JNI wrapper or my Java code.

As a result, I suspect the problem lies in InitializeMagick. Could you
please give me some pointers on how I can debug this issue? Is there
anything special that GM does at initialization time I should pay attention
to? I also tried building with openmp disabled in case there is conflict
between threading libraries.

Here are the functions involved on the GM side:

public static void initContext() throws Exception {
  initNative();
}

private static native void initNative() throws GmJniException;

JNIEXPORT void JNICALL Java_com_mediacommons_image_gm_GmImage_initNative(

    JNIEnv* env, jclass jcls) {
        InitializeMagick(nullptr);
}

Thank you,
Tianyu

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