/usr/bin/eric6_qregularexpression is in eric 6.0.8-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 | #!/bin/sh
exec "/usr/bin/python3" "/usr/share/eric/modules/eric6_qregularexpression.py" "$@"
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