[mkgmap-dev] handling of a key without a value

https://www.openstreetmap.org/node/7278416985 That node seems to crash my style while trying to execute the following command: ele=* {echo 'ele=${ele}'; set ele_m='${ele|conv:"ft=>m"}'; echo 'ele_m=${ele}'; } The echo command produces "ele=" in the transcript, afterwards "java.lang.StringIndexOutOfBoundsException: String index out of range: -1" etc. The node contains any empty values. "ele" is the only of them my style uses. Observed in: mkgmap-r4478