Malicious code in proc_macro1 (crates.io)

proc-macro1 is a typosquat of proc-macro2 published to crates.io by the account 'dtolney', impersonating David Tolnay dtolnay. Its metadata forges authors 'David Tolnay ' and points repository at a nonexistent github.com/dtolnay/proc-macro1. The library source is a copy of proc-macro2 so dependen...