Rollup merge of #102846 - zertosh:update-syn, r=dtolnay

update to syn-1.0.102

This update removes the only `.gitignore` found in `rustc-src`:

    vendor/syn/tests/.gitignore
    vendor/syn-1.0.91/tests/.gitignore
    vendor/syn-1.0.95/tests/.gitignore

To check-in `rustc-src` for hermetic builds in environments with
restrictive `.gitignore` policies, one has to remove these
`tests/.gitignore` and patch the respective
`.cargo-checksum.json`.`syn` >1.0.101 includes dtolnay/syn@3c49303bed7a,
which removes its `tests/.gitignore`. Now the `syn` crates.io package
has no `.gitignore`.

[`rustc-src`'s `vendor`][] is produced from the root `Cargo.toml`,
`src/tools/rust-analyzer/Cargo.toml`,
`compiler/rustc_codegen_cranelift/Cargo.toml`, and
`src/bootstrap/Cargo.toml`. `rustc_codegen_cranelift` does not use
`syn`.

[`rustc-src`'s `vendor`]:
  https://github.com/rust-lang/rust/blob/c0784109daa0/src/bootstrap/dist.rs#L934-L940

This was produced with:

    cargo update --package syn --precise 1.0.102 \

    cargo update --package syn --precise 1.0.102 \
        --manifest-path src/tools/rust-analyzer/Cargo.toml

    cargo update --package syn --precise 1.0.102 \
        --manifest-path src/bootstrap/Cargo.toml

4 files changed, 26 insertions, 18 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 3b8d0d87f2a..db166cf0c51 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2721,11 +2721,11 @@ checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.37"
+version = "1.0.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec757218438d5fda206afc041538b2f6d889286160d649a86a24d37e1235afd1"
+checksum = "94e2ef8dbfc347b10c094890f778ee2e36ca9bb4262e86dc99cd217e35f3470b"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -4719,13 +4719,13 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "syn"
-version = "1.0.91"
+version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b683b2b825c8eef438b77c36a06dc262294da3d5a5813fac20da149241dcd44d"
+checksum = "3fcd952facd492f9be3ef0d0b7032a6e442ee9b361d4acc2b1d0c4aaa5f613a1"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -5216,6 +5216,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "unicode-ident"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+
+[[package]]
 name = "unicode-normalization"
 version = "0.1.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/src/bootstrap/Cargo.lock b/src/bootstrap/Cargo.lock
index 84c06fdce70..baecca44cd9 100644
--- a/src/bootstrap/Cargo.lock
+++ b/src/bootstrap/Cargo.lock
@@ -445,9 +445,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.39"
+version = "1.0.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c54b25569025b7fc9651de43004ae593a75ad88543b17178aa5e1b9c4f15f56f"
+checksum = "94e2ef8dbfc347b10c094890f778ee2e36ca9bb4262e86dc99cd217e35f3470b"
 dependencies = [
  "unicode-ident",
 ]
@@ -596,9 +596,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.95"
+version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fbaf6116ab8924f39d52792136fb74fd60a80194cf1b1c6ffa6453eef1c3f942"
+checksum = "3fcd952facd492f9be3ef0d0b7032a6e442ee9b361d4acc2b1d0c4aaa5f613a1"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/src/tools/rust-analyzer/Cargo.lock b/src/tools/rust-analyzer/Cargo.lock
index 216cf51447f..6173f9a78c5 100644
--- a/src/tools/rust-analyzer/Cargo.lock
+++ b/src/tools/rust-analyzer/Cargo.lock
@@ -1190,9 +1190,9 @@ version = "0.0.0"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.43"
+version = "1.0.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
+checksum = "94e2ef8dbfc347b10c094890f778ee2e36ca9bb4262e86dc99cd217e35f3470b"
 dependencies = [
  "unicode-ident",
 ]
@@ -1593,9 +1593,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.99"
+version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
+checksum = "3fcd952facd492f9be3ef0d0b7032a6e442ee9b361d4acc2b1d0c4aaa5f613a1"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
index d4733107e79..b9e0d48c9bc 100644
--- a/src/tools/tidy/src/deps.rs
+++ b/src/tools/tidy/src/deps.rs
@@ -18,10 +18,11 @@ const LICENSES: &[&str] = &[
     "ISC",
     "Unlicense/MIT",
     "Unlicense OR MIT",
-    "0BSD OR MIT OR Apache-2.0", // adler license
-    "Zlib OR Apache-2.0 OR MIT", // tinyvec
-    "MIT OR Apache-2.0 OR Zlib", // tinyvec_macros
-    "MIT OR Zlib OR Apache-2.0", // miniz_oxide
+    "0BSD OR MIT OR Apache-2.0",                // adler license
+    "Zlib OR Apache-2.0 OR MIT",                // tinyvec
+    "MIT OR Apache-2.0 OR Zlib",                // tinyvec_macros
+    "MIT OR Zlib OR Apache-2.0",                // miniz_oxide
+    "(MIT OR Apache-2.0) AND Unicode-DFS-2016", // unicode_ident
 ];
 
 /// These are exceptions to Rust's permissive licensing policy, and
@@ -235,6 +236,7 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
     "unic-langid-macros",
     "unic-langid-macros-impl",
     "unic-ucd-version",
+    "unicode-ident",
     "unicode-normalization",
     "unicode-script",
     "unicode-security",