Wrong error generated in formatter (in parser) when missing constant definition inside parametric bindings (but not first)

[mikex-oss]

Describe the bug
You get misleading parse errors like "Expected start of an expression; got: {" or "Expected '}', got ','" from xls/dslx/frontend/bindings.h:58 in the following cases:

To Reproduce
First error:

fn foo<N: u32, M: u32>(a: u1) -> bits[M] {
    (a as bits[M]) >> N
}

const BAR = u32:1;

fn main() -> u32 {
    foo<BAR, BAZ>(u1:1)
}

Second error:

fn foo<N: u32, M: u32>(a: u1) -> bits[M] {
    (a as bits[M]) >> N
}

const BAR = u32:1;

fn main() -> u32 {
    foo<{BAR + u32:1}, BAZ>(u1:1)
}

Expected behavior

Similar to the following example, I'd expect to get an error like: Cannot find a definition for name: "BAZ"

fn foo<N: u32, M: u32>(a: u1) -> bits[M] {
    (a as bits[M]) >> N
}

const BAR = u32:1;

fn main() -> u32 {
    foo<BAZ, BAR>(u1:1)
}