Repeated macro rules cause an infinite loop

[TheZoq2]

If you define a macro which contains the rule $()* the compiler seems to go into an infinite loop and quickly consume a lot of memory

When compiling the following code:

macro_rules! test {
    ($()*) => {}
}

pub fn main()
{
    test!();
}

The compiler freezes and starts consuming memory until it runs out at which point it seems to crash.
Using the above test code, I got this error message but when I encountered this bug in a bigger project, my computer froze for about 1 minute after which the operating system killed the compiler.

fatal runtime error: out of memory
zsh: illegal hardware instruction (core dumped)  rustc test.rs

This is the output of rustc --version --verbose

rustc 1.9.0
binary: rustc
commit-hash: unknown
commit-date: unknown
host: x86_64-unknown-linux-gnu
release: 1.9.0

[jonas-schievink]

Duplicate of #5067

[Aatch]

Closing as duplicate