Auto merge of #93921 - matthiaskrgr:rollup-wn3jlxj, r=matthiaskrgr

Rollup of 10 pull requests

Successful merges:

 - #90955 (Rename `FilenameTooLong` to `InvalidFilename` and also use it for Windows' `ERROR_INVALID_NAME`)
 - #91607 (Make `span_extend_to_prev_str()` more robust)
 - #92895 (Remove some unused functionality)
 - #93635 (Add missing platform-specific information on current_dir and set_current_dir)
 - #93660 (rustdoc-json: Add some tests for typealias item)
 - #93782 (Split `pauth` target feature)
 - #93868 (Fix incorrect register conflict detection in asm!)
 - #93888 (Implement `AsFd` for `&T` and `&mut T`.)
 - #93909 (Fix typo: explicitely -> explicitly)
 - #93910 (fix mention of moved function in `rustc_hir` docs)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 16 insertions, 2 deletions

diff --git a/src/tools/jsondocck/src/main.rs b/src/tools/jsondocck/src/main.rs
index b8ea10f3d22..d0f476955e1 100644
--- a/src/tools/jsondocck/src/main.rs
+++ b/src/tools/jsondocck/src/main.rs
@@ -231,7 +231,21 @@ fn check_command(command: Command, cache: &mut Cache) -> Result<(), CkError> {
 
             let val = cache.get_value(&command.args[0])?;
             let results = select(&val, &command.args[1]).unwrap();
-            results.len() == expected
+            let eq = results.len() == expected;
+            if !command.negated && !eq {
+                return Err(CkError::FailedCheck(
+                    format!(
+                        "`{}` matched to `{:?}` with length {}, but expected length {}",
+                        &command.args[1],
+                        results,
+                        results.len(),
+                        expected
+                    ),
+                    command,
+                ));
+            } else {
+                eq
+            }
         }
         CommandKind::Is => {
             // @has <path> <jsonpath> <value> = check *exactly one* item matched by path, and it equals value
@@ -317,6 +331,6 @@ fn string_to_value<'a>(s: &str, cache: &'a Cache) -> Cow<'a, Value> {
             panic!("No variable: `{}`. Current state: `{:?}`", &s[1..], cache.variables)
         }))
     } else {
-        Cow::Owned(serde_json::from_str(s).unwrap())
+        Cow::Owned(serde_json::from_str(s).expect(&format!("Cannot convert `{}` to json", s)))
     }
 }