Fix Unicode 3.2.0 aliases, bump unicode_names2 (#9171)

Replaces: #9166

unicode_names2 fixed a bug with its aliases. Ironically, the bug
caused a test in test_snippets.py to pass. Bumping unicode_names2 to
4.0.0 fixes the bug and thus the extra 3.2.0 test fails. I fixed the
logic for name lookup for 3.2.0. Now the test correctly passes.

Cargo.lock

@@ -761,7 +761,7 @@ version = "3.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "faf9468729b8cbcea668e36183cb69d317348c2e08e994829fb56ebfdfbaac34"
 dependencies = [
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1296,9 +1296,9 @@ dependencies = [
 
 [[package]]
 name = "dirs"
-version = "6.0.0"
+version = "7.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3e8aa94d75141228480295a7d0e7feb620b1a5ad9f12bc40be62411e38cce4e"
+checksum = "8d57d423b3c82e89b9a24ca3091fee61f456a26edbd28d26c65906f4bc1dcd8f"
 dependencies = [
  "dirs-sys",
 ]
@@ -1463,7 +1463,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -2042,7 +2042,7 @@ checksum = "3640c1c38b8e4e43584d8df18be5fc6b0aa314ce6ebf51b53313d4306cca8e46"
 dependencies = [
  "hermit-abi",
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -3562,7 +3562,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -4070,7 +4070,7 @@ dependencies = [
  "icu_normalizer",
  "icu_properties",
  "rustpython-wtf8",
- "unicode_names2 3.1.0",
+ "unicode_names2 4.0.0",
  "writeable",
  "zlib-rs",
 ]
@@ -4667,7 +4667,7 @@ dependencies = [
  "getrandom 0.4.3",
  "once_cell",
  "rustix",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -4887,12 +4887,12 @@ dependencies = [
 
 [[package]]
 name = "unicode_names2"
-version = "3.1.0"
+version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "82c3e18d850bb6ebd57735e5654f0af65e572b05c2397e7b2b1a7c6a792cc29c"
+checksum = "8ba646312acace3c9ec35d7404b58214b6fbf17cbb0d040f35a88407c424447f"
 dependencies = [
  "phf 0.11.3",
- "unicode_names2_generator 3.1.0",
+ "unicode_names2_generator 4.0.0",
 ]
 
 [[package]]
@@ -4909,9 +4909,9 @@ dependencies = [
 
 [[package]]
 name = "unicode_names2_generator"
-version = "3.1.0"
+version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "849744a58c479122ff24910d7ca57f312b62613ef0412dc327776ae6b235d16a"
+checksum = "3afbb72a8cff40859641ae4e56679215a15764e5c155a46f0f534611bdc08e0e"
 dependencies = [
  "phf_codegen",
  "rand 0.8.6",
@@ -5161,7 +5161,7 @@ version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]

Cargo.toml

@@ -48,7 +48,7 @@ log = { workspace = true }
 flame = { workspace = true, optional = true }
 
 lexopt = "0.3"
-dirs = "6"
+dirs = "7"
 env_logger = "0.11"
 flamescope = { version = "0.1.2", optional = true }
 
@@ -317,7 +317,7 @@ icu_locale = "2"
 icu_properties = "2"
 icu_normalizer = "2"
 uuid = "1.23.2"
-unicode_names2 = { version = "3", default-features = false, features = ["no_std"] }
+unicode_names2 = { version = "4", default-features = false, features = ["no_std"] }
 widestring = "1.2.0"
 windows-sys = "0.61.2"
 wasm-bindgen = "0.2.106"

crates/unicode/src/data.rs

@@ -301,7 +301,20 @@ impl Ucd {
         if let Some(ch) = unicode_names2::character(search_name)
             .or_else(|| AlgorithmicName::check_name(search_name))
         {
-            return self.membership(ch).then_some(LookupResult::Character(ch));
+            if self.modern {
+                return Some(LookupResult::Character(ch));
+            }
+            cold_path();
+
+            if !self.membership(ch) {
+                return None;
+            }
+
+            // 3.2.0 doesn't have aliases but unicode_names2 supports aliases so reject them.
+            if lookup_alias(search_name).is_some() {
+                return None;
+            }
+            return Some(LookupResult::Character(ch));
         }
         if !self.modern {
             return None;