Invalid conditional syntax in Underlords gameinfo.gi

[xPaw]

File: https://github.com/SteamDatabase/GameTracking-Underlords/blob/master/game/dac/gameinfo.gi

System.IO.InvalidDataException: Invalid conditional syntax "!$MOBILE && !$MOBILE_RSRC && !$BUILDALLSHADERS_RUN && !$CONTENTBUILDER_RUN && !$VMPI_GAMEINFO"
 ---> System.InvalidOperationException: Bad condition syntax.
   at ValveKeyValue.KVConditionEvaluator.ReadToken(TextReader reader)
   at ValveKeyValue.KVConditionEvaluator.Evalute(String expressionText)
   --- End of inner exception stack trace ---
   at ValveKeyValue.KVConditionEvaluator.Evalute(String expressionText)
   at ValveKeyValue.Deserialization.KV1TextReader.HandleCondition(String text)
   at ValveKeyValue.Deserialization.KV1TextReader.ReadObject()
   at ValveKeyValue.KVSerializer.Deserialize(Stream stream, KVSerializerOptions options)
   at GUI.Utils.AdvancedGuiFileLoader.FindAndLoadSearchPaths() in D:\GitHub\ValveResourceFormat\GUI\Utils\AdvancedGuiFileLoader.cs:line 160

[xPaw]

Its failing because IsReadableVariableCharacter returns false for _ in MOBILE_RSRC.

In Source engine code, they also hack it in:

while( (V_isalnum( m_pExpression[m_CurPosition] ) || m_pExpression[m_CurPosition] == '_') && i < MAX_IDENTIFIER_LEN )