META generation bug in different scopes

test/blackbox-tests/jbuild

@@ -257,3 +257,13 @@
      (progn
       (run ${exe:cram.exe} run.t)
       (diff? run.t run.t.corrected)))))))
+
+(alias
+ ((name runtest)
+  (deps ((files_recursively_in test-cases/scope-bug)))
+  (action
+   (chdir test-cases/scope-bug
+    (setenv JBUILDER ${bin:jbuilder}
+     (progn
+      (run ${exe:cram.exe} run.t)
+      (diff? run.t run.t.corrected)))))))

test/blackbox-tests/test-cases/scope-bug/alib/jbuild

@@ -0,0 +1,6 @@
+(jbuild_version 1)
+
+(library
+ ((name alib)
+  (public_name alib)
+  (libraries (blib))))

test/blackbox-tests/test-cases/scope-bug/blib/jbuild

@@ -0,0 +1,6 @@
+(jbuild_version 1)
+
+(library
+ ((name blib)
+  (public_name blib)
+  (libraries (sub))))

test/blackbox-tests/test-cases/scope-bug/blib/sub/jbuild

@@ -0,0 +1,5 @@
+(jbuild_version 1)
+
+(library
+ ((name sub)
+  (public_name blib.sub)))

test/blackbox-tests/test-cases/scope-bug/run.t

@@ -0,0 +1,5 @@
+  $ $JBUILDER build -j1 --root . @install
+  Error: External library "sub" not found.
+  -> required by "alib/jbuild (context default)"
+  Hint: try: jbuilder external-lib-deps --missing --root . @install
+  [1]