Crystal 1.19.0 is released!

We are announcing a new Crystal release 1.19.0 with several new features and bug fixes.

Pre-built packages are available on GitHub Releases and our official distribution channels. See crystal-lang.org/install for installation instructions.


This is a companion discussion topic for the original entry at https://crystal-lang.org/2026/01/15/1.19.0-released
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Great job all

Well done. :slight_smile:

Is there a way to check current app running with -O1 or -O3 use flag? macro?