Fix bug #4661: Cannot mask the absolute name.

The patch is quite dumb: it essentially consists in alpha-renaming bound
module names when printing a functor, by checking that the name was not
already present, and generating a fresh one otherwise.

3 files changed, 27 insertions, 0 deletions

diff --git a/test-suite/bugs/closed/4661.v b/test-suite/bugs/closed/4661.v
new file mode 100644
index 0000000000..03d2350a69
--- /dev/null
+++ b/test-suite/bugs/closed/4661.v
@@ -0,0 +1,10 @@
+Module Type Test.
+  Parameter t : Type.
+End Test.
+
+Module Type Func (T:Test).
+  Parameter x : Type.
+End Func.
+
+Module Shortest_path (T : Test).
+Print Func.
diff --git a/test-suite/output/PrintModule.out b/test-suite/output/PrintModule.out
index db464fd07e..751d5fcc48 100644
--- a/test-suite/output/PrintModule.out
+++ b/test-suite/output/PrintModule.out
@@ -2,3 +2,4 @@ Module N : S with Definition T := nat := M
 
 Module N : S with Module T := K := M
 
+Module Type Func = Funsig (T0:Test) Sig Parameter x : T0.t. End
diff --git a/test-suite/output/PrintModule.v b/test-suite/output/PrintModule.v
index 999d9a9862..5f30f7cda6 100644
--- a/test-suite/output/PrintModule.v
+++ b/test-suite/output/PrintModule.v
@@ -32,3 +32,19 @@ Module N : S with Module T := K := M.
 Print Module N.
 
 End BAR.
+
+Module QUX.
+
+Module Type Test.
+  Parameter t : Type.
+End Test.
+
+Module Type Func (T:Test).
+  Parameter x : T.t.
+End Func.
+
+Module Shortest_path (T : Test).
+Print Func.
+End Shortest_path.
+
+End QUX.