Apache mod_rewrite query string matches from RewriteCond not available in RewriteRule substitution when QSD flag used

[mikevh]

Using the rewrite rule below, read in from the mod_rewrites.txt. The resulting redirect does not have the report id value as expected at the end of the url. The %1 should have the value matched from the backreference to the RewriteCond line. This rule works as I expect on Apache

To Reproduce

1. Using ASP.NET Core 2.2

2. Add mod_rewrites.txt with this rewrite rule in it
   RewriteCond %{REQUEST_URI} /home
   RewriteCond %{QUERY_STRING} report_id=(.+)
   RewriteRule (.*) http://localhost:64782/home/report/%1 [R=301,L,QSD]

3. Add this call in Startup.cs

using (var sr = File.OpenText("mod_rewrites.txt")) {
    var rwo = new RewriteOptions().AddApacheModRewrite(sr);
    app.UseRewriter(rwo);
}

4. Add HomeController action

[HttpGet("/home/report/{id}")]
        public IActionResult Report(int id)
        {
            return Content("rewritten id = " + id);
        }

5. Run and navigate to http://localhost:64782/home?report_id=123

Expected behavior

Rewritten URL is http://localhost:64782/home/report/123

Actual behavior

Rewritten URL is http://localhost:64782/home/report/

Additional context

This rewrite rule works as expected in Apache

Issue previously submitted as doc bug here

[jkotalik]

I confirmed this repro'd and have a fix in a PR.

[jkotalik]

Acceptance checklist (check one item)

• We decided not to take this fix.
• The fix is tests-only.
• The fix contains product changes (check all items below).
  • Relevant XML documentation comments for new public APIs are present.
  • Narrative docs (docs.microsoft.com) are updated. (check one item below)
    • The change requires a new article. An issue with an outline has been filed here: [ISSUE LINK]
    • The change requires a change to an existing article. A docs PR with these changes is linked here: [PR LINK]
    • The change requires no docs changes.
  • Verification has been completed. (check one item below)
    • Verified against ASP.NET Core App Version 3.0.0-preview7.19351.2