typing: ensure monotony on literal arrays

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/semantize/typing.nit b/src/semantize/typing.nit
index 212f43e..ba08e4d 100644 (file)
--- a/src/semantize/typing.nit
+++ b/src/semantize/typing.nit
@@ -1334,6 +1334,8 @@ redef class AArrayExpr
                        end
                end
                if mtype == null then
+                       # Ensure monotony for type adaptation on loops
+                       if self.element_mtype != null then mtypes.add self.element_mtype
                        mtype = v.merge_types(self, mtypes)
                end
                if mtype == null or mtype isa MNullType then