[vim/vim] indent/sh.vim treats ${#array[@]} as an opening block (Issue #21440)

[Marcel Hüttenberger]

papachaotica created an issue (vim/vim#21440)

Version

Vim 9.1, Debian package (runtime/indent/sh.vim is in use).

Steps to reproduce

Create a Bash file containing:

#!/bin/bash

scans=(a.png b.png)

printf '%d\n' "${#scans[@]}"
    for scan in "${scans[@]}"; do
        :
    done

or

if (( SPLIT == 0 )); then
    split=${#output[@]}
    else
        split="$SPLIT"
fi 


${#scans[@]} is a Bash parameter expansion that returns the array length. It is not an opening { block.

# possible fix - line 320-322
function! s:start_block(line)
-   return a:line =~ '^[^#]*[{(]\s*\(#.*\)\?$'
+  return a:line =~ '^[^#]*\$\@<![{(]\s*\(#.*\)\?$'
endfunction

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