1db8c9d6e2
Parse rustc version at compile time This PR eliminates a couple awkward codepaths where it was not clear how the compiler should proceed if its own version number is incomprehensible.dab715641e/src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs (L385)dab715641e/compiler/rustc_attr/src/builtin.rs (L630)We can guarantee that every compiled rustc comes with a working version number, so the ICE codepaths above shouldn't need to be written.