Crash when "in multiset" in failing precondition

[MikaelMayer]

Dafny returns an incorrect error message for this code:

lemma Lemma(x: int, p: multiset<int>)
  requires x in p
{}

method Test() {
  Lemma(1, multiset{});
}

Dafny returns:

git-issue.dfy(6,7): Error: A precondition for this call might not hold.
(0,-1): Related location: This is the precondition that might not hold.

Because the related location is wrong, this also crashes the language server

Unhandled exception. System.UriFormatException: Given uri is null or empty
at OmniSharp.Extensions.LanguageServer.Protocol.DocumentUri.Parse(String value, Boolean strict)
at Microsoft.Dafny.LanguageServer.Language.DiagnosticErrorReporter.CreateLocation(IToken token) in