Prevent exceptions from escaping FFM log callback

Author: doblon8

src/main/java/io/github/doblon8/openpnp/capture/OpenPnpCapture.java

@@ -58,8 +58,15 @@ public static void setLogLevel(LogLevel level) {
      *                    which will be called for each log message generated by the library.
      */
     public static void installCustomLogFunction(BiConsumer<LogLevel, String> logFunction) {
-        MemorySegment functionPointer = CapCustomLogFunc.allocate((level, stringPointer) ->
-                logFunction.accept(LogLevel.fromNative(level), stringPointer.getString(0)), arena);
+        MemorySegment functionPointer = CapCustomLogFunc.allocate((level, stringPointer) -> {
+            try {
+                LogLevel logLevel = LogLevel.fromNative(level);
+                String message = stringPointer.getString(0);
+                logFunction.accept(logLevel, message);
+            } catch (Throwable t) {
+                t.printStackTrace(System.err);
+            }
+        }, arena);
         Cap_installCustomLogFunction(functionPointer);
     }