warning: could not parse code block as Rust code
  --> $DIR/invalid-syntax.rs:3:5
   |
LL |   /// ```
   |  _____^
LL | | /// \__________pkt->size___________/          \_result->size_/ \__pkt->size__/
LL | | /// ```
   | |_______^
   |
   = note: error from rustc: unknown start of token: \
help: mark blocks that do not contain Rust code as text
   |
LL | /// ```text
   |     ^^^^^^^

warning: could not parse code block as Rust code
  --> $DIR/invalid-syntax.rs:8:5
   |
LL |   /// ```
   |  _____^
LL | | ///    |
LL | | /// LL | use foobar::Baz;
LL | | ///    |     ^^^^^^ did you mean `baz::foobar`?
LL | | /// ```
   | |_______^
   |
   = note: error from rustc: unknown start of token: `
help: mark blocks that do not contain Rust code as text
   |
LL | /// ```text
   |     ^^^^^^^

warning: could not parse code block as Rust code
  --> $DIR/invalid-syntax.rs:19:5
   |
LL |   /// ```
   |  _____^
LL | | /// \_
LL | | /// ```
   | |_______^
   |
   = note: error from rustc: unknown start of token: \
help: mark blocks that do not contain Rust code as text
   |
LL | /// ```text
   |     ^^^^^^^

warning: could not parse code block as Rust code
  --> $DIR/invalid-syntax.rs:32:5
   |
LL |   /// ```rust
   |  _____^
LL | | /// \_
LL | | /// ```
   | |_______^
   |
   = note: error from rustc: unknown start of token: \

warning: could not parse code block as Rust code
  --> $DIR/invalid-syntax.rs:41:9
   |
LL |   ///     code with bad syntax
   |  _________^
LL | | ///     \_
   | |__________^
   |
   = note: error from rustc: unknown start of token: \

warning: could not parse code block as Rust code
  --> $DIR/invalid-syntax.rs:55:9
   |
LL | ///     ```
   |         ^^^
   |
   = note: error from rustc: unknown start of token: `

warning: could not parse code block as Rust code
  --> $DIR/invalid-syntax.rs:58:5
   |
LL |   /// ```edition2018
   |  _____^
LL | | /// \_
LL | | /// ```
   | |_______^
   |
   = note: error from rustc: unknown start of token: \

warning: doc comment contains an invalid Rust code block
  --> $DIR/invalid-syntax.rs:63:1
   |
LL | / #[doc = "```"]
LL | | /// \_
LL | | #[doc = "```"]
   | |______________^
   |
   = help: mark blocks that do not contain Rust code as text: ```text