awk 5.2.2 - Inplace Syntax Error When File Contains Dot

[Douglas Charles Duckworth]

Hi,

awk can parse a file and print results to stdout fine but when I try the 
inplace module it fails if the file contains dot.

My version:

[~]$ gawk -V
GNU Awk 5.2.2, API 3.2, PMA Avon 8-g1
Copyright (C) 1989, 1991-2023 Free Software Foundation.
The file:

[~]$ cat file
test data

whatis
container.sif

Success:

[~]$ awk '1;/whatis/{ print " "; print "module use /cm/local/modulefiles"}' file

test data

whatis

module use /cm/local/modulefiles
container.sif

Failure:

[~]$ gawk -i file '1;/whatis/{ print " "; print "module use 
/cm/local/modulefiles"}'
gawk: file:5: container.sifgawk: file:5: ^ syntax error

This seems to occur whenever the input file contains "."