date_trunc benchmark fails with a panic #15167
Description
Describe the bug
Benchmarking date_trunc_minute_1000: Warming up for 3.0000 s
thread 'main' panicked at datafusion/functions/src/datetime/date_trunc.rs:149:16:
index out of bounds: the len is 1 but the index is 1
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
The line # may be off because I'm seeing this in a sidebranch I'm working on but I'm fairly certain this will happen in main too.
The issue is the return type is wrong in the benchmark
let return_type = &udf.return_type(&[timestamps.data_type()]).unwrap();I think this was broken in #15049
To Reproduce
No response
Expected behavior
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Additional context
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