Slight change to placeholder variable causes loss of translation

[vitexikora]

Description

Changing a translation from eg.

t`Náhledový obrázek aplikace ${title}`

to

t`Náhledový obrázek aplikace ${title ?? '-'}`

Will destroy current translations like this:

+ #. placeholder {0}: title ?? '-'
#: src/modules/SoftwareTools/components/SoftwareToolsListItem/SoftwareToolsListItemBox.tsx
#: src/modules/SoftwareTools/components/SoftwareToolsListItem/SoftwareToolsListItem.tsx
+ msgid "Náhledový obrázek aplikace {0}"
+ msgstr ""

+ #: src/modules/SoftwareTools/components/SoftwareToolsListItem/SoftwareToolsListItemBox.tsx
+ #: src/modules/SoftwareTools/components/SoftwareToolsListItem/SoftwareToolsListItem.tsx
+ #~ msgid "Náhledový obrázek aplikace {title}"
+ #~ msgstr "Preview image of the {title} application"

Is this really intentional?

Verifications

• I've checked the docs and this isn't covered there.
• I've searched existing issues on GitHub.

Reproduction Steps

see Description

Expected Behavior

Changing an expression in the placeholder variable should not change translation key.
Maybe use the number index always, since the context is available in the comment.

Macro Support

SWC with @lingui/swc-plugin

Lingui Version

5.3.0

Babel Version

no babel

Framework

RsBuild + Typescript

[timofei-iatsenko]

This is by design, you can use named placeholder instead

t`Náhledový obrázek aplikace ${{title: title ?? '-'}}`

And enable eslint rule to block expressions in placeholders https://github.com/lingui/eslint-plugin/blob/main/docs/rules/no-expression-in-message.md