Clement Courbet 39427b1098 Reapply "[clang analysis][thread-safety] Handle return-by-reference..… (#68572) ...

…… (#68394)"

The new warnings are now under a separate flag
`-Wthread-safety-reference-return`, which is on by default under
`-Wthread-safety-reference`.

- People can opt out via `-Wthread-safety-reference
-Wnothread-safety-reference-return`.
This reverts commit 859f2d0323.

2023-10-19 08:34:59 +02:00

100 KiB

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