More accurately tag serde_json errors

Summary: ^

Reviewed By: JakobDegen

Differential Revision: D68221224

fbshipit-source-id: 25027a139b4c1284c9a9dc05b1c06c0ca6672210

app/buck2_error/src/conversion/serde_json.rs

@@ -7,10 +7,17 @@
  * of this source tree.
  */
 
+use serde_json::error::Category;
+
 impl From<serde_json::Error> for crate::Error {
     #[cold]
     #[track_caller]
     fn from(value: serde_json::Error) -> Self {
-        crate::conversion::from_any_with_tag(value, crate::ErrorTag::Tier0)
+        let error_tag = match value.classify() {
+            Category::Data | Category::Syntax => crate::ErrorTag::Input,
+            Category::Eof | Category::Io => crate::ErrorTag::Tier0,
+        };
+
+        crate::conversion::from_any_with_tag(value, error_tag)
     }
 }