Then I move into the thread, the RV gets cloned, the SvUV it points to gets cloned; but the value within the SvUV (labelled 'o:' in the printfs), also changes.

huh? The RV doesn't point to a UV. You never even create a scalar with a UV.

In reply to Re^7: semi-panic: attempt to dup freed string? by ikegami
in thread semi-panic: attempt to dup freed string? by BrowserUk

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