upgrade rustdoc's pulldown-cmark to 0.5.2

Fixes #60482.

Author: euclio

Cargo.lock

@@ -409,7 +409,7 @@ dependencies = [
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "pulldown-cmark 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pulldown-cmark 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "quine-mc_cluskey 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex-syntax 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2001,23 +2001,13 @@ dependencies = [
 
 [[package]]
 name = "pulldown-cmark"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicase 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "pulldown-cmark"
-version = "0.5.0"
+version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicase 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicase 2.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3062,7 +3052,7 @@ version = "0.0.0"
 dependencies = [
  "minifier 0.0.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "pulldown-cmark 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pulldown-cmark 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -3824,7 +3814,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "unicase"
-version = "2.3.0"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -4241,8 +4231,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)" = "77619697826f31a02ae974457af0b29b723e5619e113e9397b8b82c6bd253f09"
 "checksum proptest 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)" = "24f5844db2f839e97e3021980975f6ebf8691d9b9b2ca67ed3feb38dc3edb52c"
 "checksum pulldown-cmark 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d6fdf85cda6cadfae5428a54661d431330b312bc767ddbc57adbedc24da66e32"
-"checksum pulldown-cmark 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d1b74cc784b038a9921fd1a48310cc2e238101aa8ae0b94201e2d85121dd68b5"
-"checksum pulldown-cmark 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "157737d41407de9c5e0563a991d085117d60ae729af2cc1bf28d6dfbc97bcc1f"
+"checksum pulldown-cmark 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "051e60ace841b3bfecd402fe5051c06cb3bec4a6e6fdd060a37aa8eb829a1db3"
 "checksum quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9274b940887ce9addde99c4eee6b5c44cc494b182b97e73dc8ffdcb3397fd3f0"
 "checksum quine-mc_cluskey 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "07589615d719a60c8dd8a4622e7946465dfef20d1a428f969e3443e7386d5f45"
 "checksum quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a"
@@ -4354,7 +4343,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169"
 "checksum ucd-trie 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "71a9c5b1fe77426cf144cc30e49e955270f5086e31a6441dfa8b32efc09b9d77"
 "checksum ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "535c204ee4d8434478593480b8f86ab45ec9aae0e83c568ca81abf0fd0e88f86"
-"checksum unicase 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "41d17211f887da8e4a70a45b9536f26fc5de166b81e2d5d80de4a17fd22553bd"
+"checksum unicase 2.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a84e5511b2a947f3ae965dcb29b13b7b1691b6e7332cf5dbc1744138d5acb7f6"
 "checksum unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
 "checksum unicode-normalization 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "6a0180bc61fc5a987082bfa111f4cc95c4caff7f9799f3e46df09163a937aa25"
 "checksum unicode-segmentation 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "aa6024fc12ddfd1c6dbc14a80fa2324d4568849869b779f6bd37e5e4c03344d1"

src/librustdoc/Cargo.toml

@@ -9,7 +9,7 @@ name = "rustdoc"
 path = "lib.rs"
 
 [dependencies]
-pulldown-cmark = { version = "0.4.1", default-features = false }
+pulldown-cmark = { version = "0.5.2", default-features = false }
 minifier = "0.0.30"
 tempfile = "3"
 parking_lot = "0.7"

src/librustdoc/html/markdown.rs

@@ -351,9 +351,11 @@ impl<'a, 'b, 'ids, I: Iterator<Item = Event<'a>>> Iterator for HeadingLinks<'a,
         if let Some(Event::Start(Tag::Header(level))) = event {
             let mut id = String::new();
             for event in &mut self.inner {
-                match event {
+                match &event {
                     Event::End(Tag::Header(..)) => break,
-                    Event::Text(ref text) => id.extend(text.chars().filter_map(slugify)),
+                    Event::Text(text) | Event::Code(text) => {
+                        id.extend(text.chars().filter_map(slugify));
+                    }
                     _ => {},
                 }
                 self.buf.push_back(event);
@@ -402,7 +404,6 @@ fn check_if_allowed_tag(t: &Tag<'_>) -> bool {
         | Tag::Item
         | Tag::Emphasis
         | Tag::Strong
-        | Tag::Code
         | Tag::Link(..)
         | Tag::BlockQuote => true,
         _ => false,
@@ -790,9 +791,8 @@ pub fn plain_summary_line_full(md: &str, limit_length: bool) -> String {
             let next_event = next_event.unwrap();
             let (ret, is_in) = match next_event {
                 Event::Start(Tag::Paragraph) => (None, 1),
-                Event::Start(Tag::Code) => (Some("`".to_owned()), 1),
-                Event::End(Tag::Code) => (Some("`".to_owned()), -1),
                 Event::Start(Tag::Header(_)) => (None, 1),
+                Event::Code(code) => (Some(format!("`{}`", code)), 0),
                 Event::Text(ref s) if self.is_in > 0 => (Some(s.as_ref().to_owned()), 0),
                 Event::End(Tag::Paragraph) | Event::End(Tag::Header(_)) => (None, -1),
                 _ => (None, 0),

src/test/rustdoc/issue-60482.rs

@@ -0,0 +1,9 @@
+// This code caused a panic in `pulldown-cmark` 0.4.1.
+
+pub const BASIC_UNICODE: bool = true;
+
+
+/// # `BASIC_UNICODE`: `A` `|`
+/// ```text
+/// ```
+pub const BASIC_FONTS: bool = true;