Dandandan opened a new issue, #22217:
URL: https://github.com/apache/datafusion/issues/22217
### Describe the bug
The array execution path for `repeat(string, count)` can panic on a large
count because it multiplies string length by count before checking for overflow.
### To Reproduce
```sql
SELECT repeat(x, 9223372036854775807)
FROM (VALUES ('abc')) AS t(x);
```
### Actual behavior
```text
thread 'main' panicked at datafusion/functions/src/string/repeat.rs:237:41:
attempt to multiply with overflow
```
### Expected behavior
Return a string-size overflow error, as the scalar path already does, rather
than panicking.
### Notes
This reproducer uses a one-row input column so it reaches the array path
without trying to allocate the full result.
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