fix(rspack_loader_runner): char_boundary panic when debug content (#6412

)

crates/rspack_loader_runner/src/content.rs

@@ -87,7 +87,10 @@ impl Debug for Content {
  };
 
  content
- .field(ty, &s[0..usize::min(s.len(), 20)].to_owned())
+ .field(
+ ty,
+ &s[0..usize::min(s.len(), s.ceil_char_boundary(20))].to_owned(),
+ )
  .finish()
  }
 }

crates/rspack_loader_runner/src/lib.rs

@@ -1,4 +1,5 @@
 #![feature(let_chains)]
+#![feature(round_char_boundary)]
 
 mod content;
 mod loader;