Update v0.rs

Author: TDecking

compiler/rustc_symbol_mangling/src/v0.rs

@@ -831,7 +831,7 @@ impl<'tcx> Printer<'tcx> for SymbolMangler<'tcx> {
 /// e.g. `1` becomes `"0_"`, `62` becomes `"Z_"`, etc.
 pub(crate)fnpush_integer_62(x:u64,output:&mutString){
 ifletSome(x) = x.checked_sub(1){
- base_n::push_str(x asu128,62, output);
+ base_n::push_str(x asu128,base_n::ALPHANUMERIC_ONLY, output);
 }
  output.push('_');
 }