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Fix a few theoretical null pointer dereference issues

Description

These issues were reported by Bharti.

I don't think they can really happen in real situations but I think they should be fixed anyway.

(Note that the reports contained more of them but they were false positives or things that were indeed safe)

Environment

None

Status

Assignee

Guillaume Smet

Reporter

Guillaume Smet

Labels

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Worked in

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Feedback Requested

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Feedback Requested By

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backPortable

None

Community Help Wanted

None

Suitable for new contributors

None

Requires Release Note

None

backportDecision

None

backportReEvaluate

None

Components

Fix versions

Priority

Minor