Post Syndicated from corbet original https://lwn.net/Articles/942656/

Version
1.72.0 of the Rust compiler has been released. Changes include
improved diagnostics and the removal of a limit on const evaluation:

To prevent user-provided const evaluation from getting into a
compile-time infinite loop or otherwise taking unbounded time at
compile time, Rust previously limited the maximum number of
statements run as part of any given constant evaluation. However,
especially creative Rust code could hit these limits and produce a
compiler error. Worse, whether code hit the limit could vary wildly
based on libraries invoked by the user; if a library you invoked
split a statement into two within one of its functions, your code
could then fail to compile.

Now, you can do an unlimited amount of const evaluation at compile
time.