Add a test for #759

test/blackbox-tests/dune.inc

@@ -193,6 +193,14 @@
      (run ${exe:cram.exe} -skip-versions 4.02.3 -test run.t)
      (diff? run.t run.t.corrected))))))
 
+(alias
+ ((name github759)
+  (deps ((package dune) (files_recursively_in test-cases/github759)))
+  (action
+   (chdir
+    test-cases/github759
+    (progn (run ${exe:cram.exe} -test run.t) (diff? run.t run.t.corrected))))))
+
 (alias
  ((name include-loop)
   (deps ((package dune) (files_recursively_in test-cases/include-loop)))
@@ -476,6 +484,7 @@
     (alias github644)
     (alias github660)
     (alias github717-odoc-index)
+    (alias github759)
     (alias include-loop)
     (alias inline_tests)
     (alias installable-dup-private-libs)
@@ -528,6 +537,7 @@
     (alias github568)
     (alias github597)
     (alias github660)
+    (alias github759)
     (alias include-loop)
     (alias inline_tests)
     (alias installable-dup-private-libs)

test/blackbox-tests/test-cases/github759/jbuild

@@ -0,0 +1 @@
+(library ((name foo)))

test/blackbox-tests/test-cases/github759/run.t

@@ -0,0 +1,14 @@
+  $ jbuilder build foo.cma
+  $ cat .merlin
+  B _build/default/.foo.objs
+  FLG -open Foo -w -40
+  S .
+  $ rm -f .merlin
+  $ jbuilder build foo.cma
+  $ cat .merlin
+  cat: .merlin: No such file or directory
+  [1]
+  $ echo toto > .merlin
+  $ jbuilder build foo.cma
+  $ cat .merlin
+  toto