Bug reproduction

This reproduction is based on Next i18n-routing official example. A redirection is added in getStaticProps to a different locale, which creates a bug.

It seems that the inter-locale redirections are not supported in the getStaticProps/getServerSideProps: the same api for redirects than in next.config.js with locale: false would be needed.

Reproduction steps

• yarn install
• yarn build
• yarn start

getStaticProps

• Go to http://localhost:3000/fr/gsp/first

• You should be successfully redirected to http://localhost:3000/nl/gsp/first

• Click the fr link

• Check the error message in the console:

  Uncaught (in promise) Error: The provided `as` value (/fr/nl/gsp/first) is incompatible with the `href` value (/gsp/[slug])
  

• Go to http://localhost:3000/fr

• Click the To dynamic getStaticProps page link

• Same error as above

getServerSideProps

• Go to http://localhost:9000/fr/gssp
• You should be successfully redirected to http://localhost:3000/nl/gssp
• Click the fr link
• You should be redirected to http://localhost:9000/fr/nl/gssp (note the 2 locales)
• Go to http://localhost:3000/fr
• Click the To getServerSideProps page link
• Same errored redirection as last one