37MB is nowhere near any 32-bit limit. Maybe you are overflowing the machine stack in an extension?

• What signal killed the process? (What does echo $? output?)
• What does a stack trace have to say?
• Do you have (minimal) code we can run to try to reproduce it?
• What version of Perl are you using?
• Have you tried the latest version of Perl?
• Have you tried running under a debug build of Perl? (It adds a whole bunch of sanity checks.)

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