Update encode.rs

Author: TDecking

compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/encode.rs

@@ -736,7 +736,7 @@ fn encode_ty_name(tcx: TyCtxt<'_>, def_id: DefId) -> String {
 /// <https://rust-lang.github.io/rfcs/2603-rust-symbol-name-mangling-v0.html>).
 fnto_disambiguator(num:u64) -> String{
 ifletSome(num) = num.checked_sub(1){
-format!("s{}_", base_n::encode(num asu128,62))
+format!("s{}_", base_n::encode(num asu128,base_n::ALPHANUMERIC_ONLY))
 }else{
 "s_".to_string()
 }
@@ -746,7 +746,7 @@ fn to_disambiguator(num: u64) -> String {
 /// <https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangle.seq-id>).
 fnto_seq_id(num:usize) -> String{
 ifletSome(num) = num.checked_sub(1){
- base_n::encode(num asu128,36).to_uppercase()
+ base_n::encode(num asu128,base_n::CASE_INSENSITIVE).to_uppercase()
 }else{
 "".to_string()
 }