String indexing bug?

General Usage
,
1 
str = "(θ,)"
str[3]

results in

ERROR: StringIndexError: invalid index [3], valid nearby indices [2]=>'θ', [4]=>','
Stacktrace:
 [1] string_index_err(s::String, i::Int64)
   @ Base ./strings/string.jl:12
 [2] getindex_continued(s::String, i::Int64, u::UInt32)
   @ Base ./strings/string.jl:235
 [3] getindex(s::String, i::Int64)
   @ Base ./strings/string.jl:228
 [4] top-level scope
   @ REPL[11]:1

I’m guessing maybe not a bug but unicode related. Still it feels unexpected to me. Should this be expected behaviour?

2

See the manual section on Unicode and UTF-8.

5 Likes
3

When i passed a filename containing θ to ffmpeg, ffmpeg rejected it because of that character.
Some unicode chars are not fully supported yet and it seems a deep issue that hasnt been fixed after decades.

4

Thank you for pointing me to the relevant part of the manual.

5

There have been several threads on this subject, one recently prompted this PR: https://github.com/JuliaLang/julia/pull/44266

1 Like