close #7875 add testcase (#17611)

* close #7875 add testcase

* fix

tests/macros/t7875.nim

@@ -0,0 +1,22 @@
+discard """
+  nimout: "var mysym`gensym0: MyType[float32]"
+  joinable: false
+"""
+
+import macros
+
+type
+  MyType[T] = object
+
+# this is totally fine
+var mysym: MyType[float32]
+
+macro foobar(): untyped =
+  let floatSym = bindSym"float32"
+
+  result = quote do:
+    var mysym: MyType[`floatSym`]
+
+  echo result.repr
+
+foobar()