message: Improving the error message for when a patched dependency does not resolve to anything
diff: @@ -194,7 +194,8 @@ impl<'cfg> PackageRegistry<'cfg> {
  let summary = match summaries.next() {
  Some(summary) => summary,
  None => {
  - bail!("patch for `{}` in `{}` did not resolve to any crates",
  + bail!("patch for `{}` in `{}` did not resolve to any crates. Your patched \
  + dependency may conflict with the version in Cargo.lock.",
  dep.name(), url)
  }
  };
  