Backport JuliaLang/julia#54917

Author: tecosaur

src/strings/annotated.jl

@@ -596,6 +596,7 @@ function _insert_annotations!(io::AnnotatedIOBuffer, annotations::Vector{Tuple{U
         for i in reverse(axes(annotations, 1))
             annot = annotations[i]
             first(first(annot)) == 1 || continue
+            i <= length(io.annotations) || continue
             if last(annot) == last(last(io.annotations))
                 valid_run = true
                 for runlen in 1:i