Diagnostics relatedInformation contain invalid URLs

[krobelus]

Zig Version

latest

ZLS Version

latest

Client / Code Editor / Extensions

kakoune

Steps to Reproduce and Observed Behavior

Open a Zig file containing

pub fn main() void {}
pub fn main() void {}

zig-lsp sends diagnostics with "uri":"/" which seems invalid?

For more details, see the original report at kakoune-lsp/kakoune-lsp#811

Expected Behavior

"uri"://file/path/to/file.zig"

Relevant log output

LSP: DEBG From server zls: {"jsonrpc":"2.0","method":"textDocument/publishDiagnostics","params":{"uri":"file:///tmp/afac/main.zig","diagnostics":[{"range":{"start":{"line":0,"character":7},"end":{"line":0,"character":11}},"severity":1,"code":"ast-check","source":"zls","message":"duplicate struct member name 'main'","relatedInformation":[{"location":{"uri":"/","range":{"start":{"line":1,"character":7},"end":{"line":1,"character":11}}},"message":"duplicate name here"},{"location":{"uri":"/","range":{"start":{"line":0,"character":0},"end":{"line":0,"character":3}}},"message":"struct declared here"}]}]}}