test: demonstrate bug in stdlib decoding in dune-package (#7159)

Signed-off-by: Antonio Nuno Monteiro <anmonteiro@gmail.com>

test/blackbox-tests/test-cases/stdlib-compilation-depend-on-library.t

@@ -0,0 +1,78 @@
+Test dependency on installed package
+
+  $ mkdir a b prefix
+
+  $ cat > a/dune-project <<EOF
+  > (lang dune 3.7)
+  > (package (name a))
+  > (using experimental_building_ocaml_compiler_with_dune 0.1)
+  > EOF
+  $ cat > a/dune <<EOF
+  > (library
+  >  (name a)
+  >  (public_name a)
+  >  (stdlib
+  >   (modules_before_stdlib CamlinternalFormatBasics)
+  >   (internal_modules Camlinternal*)))
+  > EOF
+
+  $ cat > a/foo.ml <<EOF
+  > let x = "foo"
+  > EOF
+
+  $ cat > a/a.ml <<EOF
+  > module Foo = A__Foo
+  > EOF
+
+  $ dune build --root a
+  Entering directory 'a'
+  Leaving directory 'a'
+
+  $ dune install --root a --prefix $PWD/prefix
+  Installing $TESTCASE_ROOT/prefix/lib/a/META
+  Installing $TESTCASE_ROOT/prefix/lib/a/a.a
+  Installing $TESTCASE_ROOT/prefix/lib/a/a.cma
+  Installing $TESTCASE_ROOT/prefix/lib/a/a.cmi
+  Installing $TESTCASE_ROOT/prefix/lib/a/a.cmt
+  Installing $TESTCASE_ROOT/prefix/lib/a/a.cmx
+  Installing $TESTCASE_ROOT/prefix/lib/a/a.cmxa
+  Installing $TESTCASE_ROOT/prefix/lib/a/a.ml
+  Installing $TESTCASE_ROOT/prefix/lib/a/a__Foo.cmi
+  Installing $TESTCASE_ROOT/prefix/lib/a/a__Foo.cmt
+  Installing $TESTCASE_ROOT/prefix/lib/a/a__Foo.cmx
+  Installing $TESTCASE_ROOT/prefix/lib/a/dune-package
+  Installing $TESTCASE_ROOT/prefix/lib/a/foo.ml
+  Installing $TESTCASE_ROOT/prefix/lib/a/a.cmxs
+
+  $ cat >b/dune-project <<EOF
+  > (lang dune 3.7)
+  > (package (name b))
+  > EOF
+
+  $ cat > b/dune <<EOF
+  > (library
+  >  (public_name b)
+  >  (libraries a))
+  > EOF
+
+  $ cat > b/bar.ml <<EOF
+  > let x = A.Foo.x
+  > EOF
+
+  $ OCAMLPATH=$PWD/prefix/lib/:$OCAMLPATH dune build --root b @install --display=short
+  Entering directory 'b'
+        ocamlc .b.objs/byte/b.{cmi,cmo,cmt}
+      ocamldep .b.objs/b__Bar.impl.d
+      ocamlopt .b.objs/native/b.{cmx,o}
+  File "$TESTCASE_ROOT/prefix/lib/a/dune-package", line 40, characters 14-38:
+  40 |    (unwrapped CamlinternalFormatBasics))))
+                     ^^^^^^^^^^^^^^^^^^^^^^^^
+  Error: List expected
+  -> required by library "b" in _build/default
+  -> required by _build/default/META.b
+  -> required by _build/install/default/lib/b/META
+  -> required by _build/default/b.install
+  -> required by alias install
+  Leaving directory 'b'
+  [1]
+