BadWindow (invalid window parameter)

[r2cris]

After fixing all errors I build again, and everything seems to work but when I run:

BUILD

$ cargo build
Output 👍
Finished dev [unoptimized + debuginfo] target(s) in 0.1 secs

RUN

$ cargo run
Output 👎
Finished dev [unoptimized + debuginfo] target(s) in 0.0 secs
Running 'target/debug/rust-2048'
X Error of failed request: BadWindow (invalid Window parameter)
Major opcode of failed request: 4 (X_DestroyWindow)
Resource id in failed request: 0x0
Serial number of failed request: 166
Current serial number in output stream: 167

Any suggestion?

My OS is Lubuntu