Derive display alt formatted string requires the same named args as the main string

[dr-orlovsky]

Checklist
Put x in the boxes below:

• I am using rust compiler version no less than 1.41.1
• I am using the latest code (git checkout master && git pull origin)
• I did cargo update
• I recompiler adter removing target directory

Bug type

Put x in the boxes below:

• Build issue
• Test failing
• Runtime panic
• Incorrect results
• Unexpected/undocumented behavior

Problem description

Derive display alt formatted string requires the same named args as the main string

Reproducing

Steps to reproduce the behavior:
rust #[derive(Display)] #[display("node_info", alt = "{0}")] struct NodeInfo(u8),

Logs

error[E0425]: cannot find value `_0` in this scope
117 | |     #[display("node_info", alt = "{0}")]
118 | |     struct NodeInfo(u8),
    | |______________________^ not found in this scope