In Summoned Command Block's Command, \ Is Missing
Command:
/summon falling_block ~ ~2 ~ {TileID:137,Time:1,TileEntityData:{Command:"/say \\"}}Summoned Command Block's Command:
/say \If
/say \\\\ -> /say \\
/say \\\\\\ -> /say \\\
MC-109887
In Summoned Command Block's Command, \ Is Missing
Resolved
Invalid
0
(Unassigned)
Unconfirmed
Minecraft 1.10.2, Minecraft 16w43a, Minecraft 16w44a, Minecraft 1.11 Pre-Release 1
Retrieved
The backslash is an escape character allowing the bypass of other characters (namely quotation marks, as well as escape characters via your command) from breaking syntax and to instead be used literally.
For example, if you wanted to include a quotation mark as part of string data, you would have to escape it with a backslash:
Since you escaped a backslash character, that next backslash will be used as a literal value.