# Go [release-branch.go1.27] go1.27rc1

- Product: Go (https://whatsnew.fyi/product/go)
- Vendor: Google
- Date: 2026-06-18
- Original notes: https://github.com/golang/go/releases/tag/go1.27rc1
- Permalink: https://whatsnew.fyi/product/go/releases/2026-06-18-release-branch.go1.27-go1.27rc1

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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[release-branch.go1.27] go1.27rc1 Change-Id: I140d62e6b20672d5e0283f042338017997fe1c69 Reviewed-on: https://go-review.googlesource.com/c/go/+/792340 Reviewed-by: Dmitri Shuralyov Reviewed-by: Dmitri S…