rust-lang · Marcondiro · Oct 30, 2025
diff --git a/Cargo.lock b/Cargo.lock
@@ -4072,8 +4072,8 @@ version = "0.0.0"
 dependencies = [
  "expect-test",
  "memchr",
+ "unicode-ident",
  "unicode-properties",
- "unicode-xid",
 ]
 
 [[package]]
@@ -5890,24 +5890,24 @@ checksum = "75b844d17643ee918803943289730bec8aac480150456169e647ed0b576ba539"
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.18"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
+checksum = "9312f7c4f6ff9069b165498234ce8be658059c6728633667c526e27dc2cf1df5"
 
 [[package]]
 name = "unicode-normalization"
-version = "0.1.24"
+version = "0.1.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5033c97c4262335cded6d6fc3e5c18ab755e1a3dc96376350f3d8e9f009ad956"
+checksum = "5fd4f6878c9cb28d874b009da9e8d183b5abc80117c40bbd187a1fde336be6e8"
 dependencies = [
  "tinyvec",
 ]
 
 [[package]]
 name = "unicode-properties"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e70f2a8b45122e719eb623c01822704c4e0907e7e426a05927e1a1cfff5b75d0"
+checksum = "7df058c713841ad818f1dc5d3fd88063241cc61f49f5fbea4b951e8cf5a8d71d"
 
 [[package]]
 name = "unicode-script"

diff --git a/compiler/rustc_lexer/Cargo.toml b/compiler/rustc_lexer/Cargo.toml
@@ -15,8 +15,8 @@ Rust lexer used by rustc. No stability guarantees are provided.
 # Note that this crate purposefully does not depend on other rustc crates
 [dependencies]
 memchr = "2.7.4"
-unicode-properties = { version = "0.1.0", default-features = false, features = ["emoji"] }
-unicode-xid = "0.2.0"
+unicode-properties = { version = "0.1.4", default-features = false, features = ["emoji"] }
+unicode-ident = "1.0.22"
 
 [dev-dependencies]
 expect-test = "1.4.0"
diff --git a/compiler/rustc_lexer/src/lib.rs b/compiler/rustc_lexer/src/lib.rs
@@ -34,8 +34,8 @@ use LiteralKind::*;
 use TokenKind::*;
 use cursor::EOF_CHAR;
 pub use cursor::{Cursor, FrontmatterAllowed};
+pub use unicode_ident::UNICODE_VERSION as UNICODE_IDENT_VERSION;
 use unicode_properties::UnicodeEmoji;
-pub use unicode_xid::UNICODE_VERSION as UNICODE_XID_VERSION;
 
 /// Parsed token.
 /// It doesn't contain information about data that has been parsed,
@@ -370,14 +370,14 @@ pub fn is_horizontal_whitespace(c: char) -> bool {
 /// a formal definition of valid identifier name.
 pub fn is_id_start(c: char) -> bool {
     // This is XID_Start OR '_' (which formally is not a XID_Start).
-    c == '_' || unicode_xid::UnicodeXID::is_xid_start(c)
+    c == '_' || unicode_ident::is_xid_start(c)
 }
 
 /// True if `c` is valid as a non-first character of an identifier.
 /// See [Rust language reference](https://doc.rust-lang.org/reference/identifiers.html) for
 /// a formal definition of valid identifier name.
 pub fn is_id_continue(c: char) -> bool {
-    unicode_xid::UnicodeXID::is_xid_continue(c)
+    unicode_ident::is_xid_continue(c)
 }
 
 /// The passed string is lexically an identifier.

diff --git a/compiler/rustc_parse/Cargo.toml b/compiler/rustc_parse/Cargo.toml
@@ -20,8 +20,8 @@ rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 thin-vec = "0.2.12"
 tracing = "0.1"
-unicode-normalization = "0.1.11"
-unicode-width = "0.2.0"
+unicode-normalization = "0.1.25"
+unicode-width = "0.2.2"
 # tidy-alphabetical-end
 
 [dev-dependencies]

diff --git a/compiler/rustc_span/Cargo.toml b/compiler/rustc_span/Cargo.toml
@@ -20,5 +20,5 @@ scoped-tls = "1.0"
 sha1 = "0.10.0"
 sha2 = "0.10.1"
 tracing = "0.1"
-unicode-width = "0.2.0"
+unicode-width = "0.2.2"
 # tidy-alphabetical-end
diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
@@ -454,7 +454,6 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
     "unicode-script",
     "unicode-security",
     "unicode-width",
-    "unicode-xid",
     "utf8parse",
     "valuable",
     "version_check",

diff --git a/tests/ui-fulldeps/lexer/unicode-version.rs b/tests/ui-fulldeps/lexer/unicode-version.rs
@@ -22,6 +22,9 @@ fn main() {
          it should also be updated in the reference at \
          https://github.com/rust-lang/reference/blob/HEAD/src/identifiers.md."
     );
-    println!("Unicode XID version is: {:?}", rustc_lexer::UNICODE_XID_VERSION);
-    println!("Unicode normalization version is: {:?}", rustc_parse::UNICODE_NORMALIZATION_VERSION);
+    println!("Unicode version of unicode-ident is: {:?}", rustc_lexer::UNICODE_IDENT_VERSION);
+    println!(
+        "Unicode version of unicode-normalization is: {:?}",
+        rustc_parse::UNICODE_NORMALIZATION_VERSION
+    );
 }
diff --git a/tests/ui-fulldeps/lexer/unicode-version.run.stdout b/tests/ui-fulldeps/lexer/unicode-version.run.stdout
@@ -1,4 +1,4 @@
 Checking if Unicode version changed.
 If the Unicode version changes are intentional, it should also be updated in the reference at https://github.com/rust-lang/reference/blob/HEAD/src/identifiers.md.
-Unicode XID version is: (16, 0, 0)
-Unicode normalization version is: (16, 0, 0)
+Unicode version of unicode-ident is: (17, 0, 0)
+Unicode version of unicode-normalization is: (17, 0, 0)