It may be due to a security enforcement related with the kernel. There is an option in Linux kernels called "noexec". This feature prevents the execution of dynamically allocated memory. Huemul uses libc's malloc to allocate memory for normal objects and compiled methods. But as Huemul has to execute the compiled methods, the kernel protects itself and kills Huemul. In future versions of Huemul, memory allocation will be done with mmap. This system call allows execution of code inside dynamically allocated memory. But until that moment arrives, we have to apply a little hack to the kernel to run Huemul.