cant fix error .. findff.1: line 110: g18.mkv.mp4: syntax error: invalid arithmetic operator (error token is ".mkv.mp4")

[alex xmb ratchev]

i code on random user request scripts .. this one s one
to find path s and ffmpeg to otherwhere
suddenly , the error i dont understand

findff.1: line 110: g18.mkv.mp4: syntax error: invalid arithmetic operator
(error token is ".mkv.mp4")

that line s

 if [[ ${A[$c]} == "${A2[$c]}" && ! -e "$w" ]] ; then

which means as much as
size of file $c == size of same , but 27s earlier ( $wait loop sleep time )
and if ! $w ( tmp fs element ) exists

i moved and even removed the $w part , .. error is still showing

the last -x lines besides look like this

+ readsav
+ [[ -e /data/data/com.termux/files/home/.findff ]]
+ for c in "${!C[@]}"
+ f=/data/data/com.termux/files/home/aotin/g18.mkv
+ o=/data/data/com.termux/files/home/aot/g18.mkv.mp4
+ w=/data/data/com.termux/files/home/.findff.tmp/g18.mkv.mp4
+ d=/data/data/com.termux/files/home/aot

  < marker >

+ declare -p A A2 C
declare -A A=([g18.mkv.mp4]="329474152" [m1.avi.mp4]="225827840" )
findff.1: line 108: declare: A2: not found
declare -A
C=([g18.mkv.mp4]="/data/data/com.termux/files/home/aotin/g18.mkv"
[m1.avi.mp4]="/data/data/com.termux/files/home/aotin/m1.avi" )

  < marker >
here see A has two valid entries
filename / size

+ declare -p

< long declare -p output till few last entries >

declare -- threads="6"
declare -- tmp="/data/data/com.termux/files/home/.findff.tmp"
declare -- w="/data/data/com.termux/files/home/.findff.tmp/g18.mkv.mp4"
declare -- wait="27s"
declare -x xt_="1"
findff.1: line 110: g18.mkv.mp4: syntax error: invalid arithmetic operator
(error token is ".mkv.mp4")
+ [[ /data/data/com.termux/files/home/.findff.tmp != / ]]
+ rm -rf /data/data/com.termux/files/home/.findff.tmp
~ $

from test cmd running
xt_=1 bash -x findff.1
xt_ to set default test args

so error is in

[[ ${A[$c]} == "${A2[$c]}" ]]

.. no idea to fix it ..

just on a note , on first run there is no A2 assoc , but never seen such
cause such

.. btw its also the code with the C() s for mapfile

greets , alex xmb software

findff.1
Description: Binary data