Imported from https://youtrack.roxen.com/issue/PIKE-20

Reported by @grubba

Blocked by PIKE-21

Blocked by PIKE-22

Blocked by PIKE-23

Blocked by PIKE-24

Blocked by PIKE-25

Blocked by PIKE-26

Blocked by PIKE-27

Blocked by PIKE-28

Blocked by PIKE-29

Blocked by PIKE-30

Blocked by PIKE-31

Blocked by PIKE-34

The Pike testsuite has intermittent failures, and running it --with-dmalloc shows several leaks and triggers a few crashes.