rust-lldb: add a pretty printer for &mut slices

[zummenix]

Pretty printer for &mut slices doesn't work.

I tried this code:

fn main() {
    let mut v = vec![4, 6, 7, 8, 5, 1, 2, 3];
    slice_mut(&mut v);
}

fn slice_mut(a: &mut [u32]) {
}

In rust-lldb p a should print:

(&mut [u32]) $0 = &[4, 6, 7, 8, 5, 1, 2, 3]

Instead, it prints:

(&mut [u32]) $0 = &mut [u32] {
data_ptr: &0x10102b000, 
length: 8
}

Meta

rustc --version --verbose:

rustc 1.6.0-nightly (a2866e387 2015-11-30)
binary: rustc
commit-hash: a2866e387eab59528466a040e815568e57b20850
commit-date: 2015-11-30
host: x86_64-apple-darwin
release: 1.6.0-nightly

[zummenix]

Seems like it should be easy to fix:

rust/src/etc/debugger_pretty_printers_common.py

Lines 142 to 145 in aad4e56

	if (unqualified_type_name.startswith("&[") and
	unqualified_type_name.endswith("]") and
	self.__conforms_to_field_layout(SLICE_FIELD_NAMES)):
	return TYPE_KIND_SLICE

[archshift]

Is this still an issue?

[jdm]

Yes; #30249 was closed without merging the changes.