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In the past, I had to deal with this kind of restriction on several occasions. A segmentation fault or, more generally, abnormal process termination had to be investigated with the caveat that a core dump was not available.
For Linux, our platform of choice for this walkthrough, a few reasons come to mind:
Should you be concerned about temporary Java objects or can the JVM eliminate them for you, maybe by replacing them with implicit static instances?
Consider the following example:
For tracing filesystem accesses of Java applications, native tracing facilities are always the first choice. On Windows, use Process Monitor to trace I/O. On Linux, use strace. Other platforms provide similar facilities.
By tracing directly in Java, you can work around environment limitations. For example, strace is unavailable in a container that lacks the CAP_SYS_PTRACE capability and the container host is not always accessible. Also, a potentially lighter-weight tracing mechanism comes handy for tracing in production environments.