pub const CODEGEN_FINGERPRINT: &str = "e78f7439a8099223ffc482fcfbba12f09d347373200752630ceb6d3c82186c3f";Expand description
Build-time fingerprint of the compiler front-end — the lexer, parser, IR,
and code generator — computed in build.rs from those crates’ source and
baked in via cargo:rustc-env. Folded into the cache key so a compiler
change that alters emitted bytecode for unchanged source invalidates stale
entries automatically, within a single version, with no manual cache wipe.
HARN_VERSION only busts the cache across release bumps; this closes the
same gap for the within-version compiler edits that masked #2610. See #2621.