malkovich: Assertion `setlocale_inited' failed

I get:

$ LD_PRELOAD=~/Code/gettext-pseudolocale/build/libgettext-pseudolocale.so ./src/fwupdmgr get-devices --force

fwupdmgr: ../gettext-pseudolocale.c:133: malkovich: Assertion `setlocale_inited' failed. Aborted (core dumped)

This is what we're doing at startup: https://github.com/fwupd/fwupd/blob/main/src/fu-util.c#L3890

Any ideas welcome, thanks.