test(pkg): reproduce ocaml#11058

Signed-off-by: Rudi Grinberg <me@rgrinberg.com>

<!-- ps-id: 435862bf-91ef-4750-bf38-10336954f242 -->

test/blackbox-tests/test-cases/pkg/depopts/gh11058.t

@@ -0,0 +1,43 @@
+Reproduce github issue #11058
+
+Handling of more than one depopt:
+
+  $ . ../helpers.sh
+
+  $ mkpkg bar <<'EOF'
+  > depopts: [ "a" "b" "c" ]
+  > EOF
+
+  $ solve bar
+  Internal error, please report upstream including the contents of _build/log.
+  Description:
+    ("invalid depopts",
+     { depopts =
+         Or [ Or [ Atom ("a", Empty); Atom ("b", Empty) ]; Atom ("c", Empty) ]
+     })
+  Raised at Stdune__Code_error.raise in file
+    "otherlibs/stdune/src/code_error.ml", line 10, characters 30-62
+  Called from Dune_pkg__Opam_solver.resolve_depopts in file
+    "src/dune_pkg/opam_solver.ml", line 565, characters 3-21
+  Called from Dune_pkg__Opam_solver.opam_package_to_lock_file_pkg in file
+    "src/dune_pkg/opam_solver.ml", line 645, characters 6-48
+  Called from Stdlib__List.rev_map.rmap_f in file "list.ml" (inlined), line
+    105, characters 22-25
+  Called from Stdlib__List.rev_map in file "list.ml", line 107, characters 2-13
+  Called from Stdune__List.map in file "otherlibs/stdune/src/list.ml", line 5,
+    characters 19-33
+  Called from Dune_pkg__Opam_solver.solve_lock_dir.(fun) in file
+    "src/dune_pkg/opam_solver.ml", lines 889-896, characters 8-30
+  Called from Fiber__Scheduler.exec in file "vendor/fiber/src/scheduler.ml",
+    line 79, characters 8-11
+  Re-raised at Stdune__Exn.raise_with_backtrace in file
+    "otherlibs/stdune/src/exn.ml", line 38, characters 27-56
+  Called from Fiber__Scheduler.exec in file "vendor/fiber/src/scheduler.ml",
+    line 79, characters 8-11
+
+  I must not crash.  Uncertainty is the mind-killer. Exceptions are the
+  little-death that brings total obliteration.  I will fully express my cases. 
+  Execution will pass over me and through me.  And when it has gone past, I
+  will unwind the stack along its path.  Where the cases are handled there will
+  be nothing.  Only I will remain.
+  [1]