Add a regression test for #1019

Signed-off-by: Jeremie Dimino <jeremie@dimino.org>

test/blackbox-tests/dune.inc

@@ -200,6 +200,14 @@
    test-cases/gen-opam-install-file
    (progn (run %{exe:cram.exe} -test run.t) (diff? run.t run.t.corrected)))))
 
+(alias
+ (name github1019)
+ (deps (package dune) (source_tree test-cases/github1019))
+ (action
+  (chdir
+   test-cases/github1019
+   (progn (run %{exe:cram.exe} -test run.t) (diff? run.t run.t.corrected)))))
+
 (alias
  (name github20)
  (deps (package dune) (source_tree test-cases/github20))
@@ -743,6 +751,7 @@
   (alias findlib-error)
   (alias force-test)
   (alias gen-opam-install-file)
+  (alias github1019)
   (alias github20)
   (alias github24)
   (alias github25)
@@ -832,6 +841,7 @@
   (alias findlib-error)
   (alias force-test)
   (alias gen-opam-install-file)
+  (alias github1019)
   (alias github20)
   (alias github24)
   (alias github25)

test/blackbox-tests/test-cases/github1019/dune

@@ -0,0 +1,5 @@
+(library (name foo))
+
+(alias
+ (name default)
+ (echo %{lib:foo:foo.ml}))

test/blackbox-tests/test-cases/github1019/dune-project

@@ -0,0 +1 @@
+(lang dune 1.0)

test/blackbox-tests/test-cases/github1019/foo.ml

@@ -0,0 +1 @@
+let x = 1

test/blackbox-tests/test-cases/github1019/run.t

@@ -0,0 +1,6 @@
+Regression test for #1019
+
+  $ dune build
+  File "dune", line 5, characters 9-10:
+  Error: This character is not allowed inside %{...} forms
+  [1]