shfmt still complains that " &> redirects are a bash/mksh feature" although it parses the script as bash

[coiby]

Problem

shfmt makes the following complaint,

&> redirects are a bash/mksh feature (parsed as bash via -ln=auto)

which doesn't sound reasonable to me because the script is already parsed as bash

How to reproduce it

cat << 'EOF' > test.sh
#!/bin/bash
echo test 1 &>2
EOF


cat << 'EOF' > .editorconfig
root = true

[*]
shell_variant = posix
EOF

if ! shfmt -d test.sh; then
    echo "test failed"
fi