From f618096d6e962dca7bbc53005cef70e057b93a96 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9mie=20Dimino?= <jeremie@dimino.org>
Date: Thu, 1 Feb 2018 13:05:32 +0000
Subject: [PATCH] Add a test for dependency cycles (#475)

---
 test/blackbox-tests/jbuild                 | 10 ++++++++++
 test/blackbox-tests/test-cases/loop/jbuild |  7 +++++++
 test/blackbox-tests/test-cases/loop/run.t  |  5 +++++
 3 files changed, 22 insertions(+)
 create mode 100644 test/blackbox-tests/test-cases/loop/jbuild
 create mode 100644 test/blackbox-tests/test-cases/loop/run.t

diff --git a/test/blackbox-tests/jbuild b/test/blackbox-tests/jbuild
index a2f07432..bad8f780 100644
--- a/test/blackbox-tests/jbuild
+++ b/test/blackbox-tests/jbuild
@@ -277,3 +277,13 @@
      (progn
       (run ${exe:cram.exe} run.t)
       (diff? run.t run.t.corrected)))))))
+
+(alias
+ ((name runtest)
+  (deps ((files_recursively_in test-cases/loop)))
+  (action
+   (chdir test-cases/loop
+    (setenv JBUILDER ${bin:jbuilder}
+     (progn
+      (run ${exe:cram.exe} run.t)
+      (diff? run.t run.t.corrected)))))))
diff --git a/test/blackbox-tests/test-cases/loop/jbuild b/test/blackbox-tests/test-cases/loop/jbuild
new file mode 100644
index 00000000..faad0b48
--- /dev/null
+++ b/test/blackbox-tests/test-cases/loop/jbuild
@@ -0,0 +1,7 @@
+(jbuild_version 1)
+
+(rule (copy ${read:x} a))
+(rule (copy ${read:y} b))
+
+(rule (progn (run true) (with-stdout-to x (echo b))))
+(rule (progn (run true) (with-stdout-to y (echo a))))
diff --git a/test/blackbox-tests/test-cases/loop/run.t b/test/blackbox-tests/test-cases/loop/run.t
new file mode 100644
index 00000000..be567757
--- /dev/null
+++ b/test/blackbox-tests/test-cases/loop/run.t
@@ -0,0 +1,5 @@
+  $ $JBUILDER build --root . -j 1 a
+          true x
+          true y
+  Error: wait: : No child processes
+  [1]