Right, not everything gets merged to stable. In that case: letting us know the specifics beyond "nightly" is advisable, IMO.
The readme does mention the specifics, immediately after mentioning nightly.
> BREAKPOINTS REQUIRE ENABLING THE EXPERIMENTAL core_intrinsics FEATURE
The readme does mention the specifics, immediately after mentioning nightly.
> BREAKPOINTS REQUIRE ENABLING THE EXPERIMENTAL core_intrinsics FEATURE