From 1df5cfba52ccc71e3c69b6cd7d08cebd70bbb187 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Sat, 12 Sep 2020 23:11:38 +0200
Subject: [PATCH] fixes #15147 (#15315)

---
 compiler/varpartitions.nim   |  2 +-
 tests/arc/topt_no_cursor.nim | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/compiler/varpartitions.nim b/compiler/varpartitions.nim
index bbde68cbe5..87424c4bea 100644
--- a/compiler/varpartitions.nim
+++ b/compiler/varpartitions.nim
@@ -396,7 +396,7 @@ proc deps(c: var Partitions; dest, src: PNode) =
             (src.sym.kind in {skLet, skParam, skForVar} and hasDisabledAsgn(src.sym.typ))):
           c.s[vid].flags.incl preventCursor
 
-    if hasDestructor(src.typ):
+    if src.kind == nkSym and hasDestructor(src.typ):
       rhsIsSink(c, src)
 
 proc traverse(c: var Partitions; n: PNode) =
diff --git a/tests/arc/topt_no_cursor.nim b/tests/arc/topt_no_cursor.nim
index fe63e7585e..8a33cb2ee6 100644
--- a/tests/arc/topt_no_cursor.nim
+++ b/tests/arc/topt_no_cursor.nim
@@ -171,3 +171,24 @@ proc encodedQuery =
     elem.tt()
 
 encodedQuery()
+
+# bug #15147
+
+proc s(input: string): (string, string) =
+  result = (";", "")
+
+proc charmatch(input: string): (string, string) =
+  result = ("123", input[0 .. input.high])
+
+proc plus(input: string) =
+  var
+    lvalue, rvalue: string # cursors
+    lnext: string # must be cursor!!!
+    rnext: string # cursor
+  let lresult = charmatch(input)
+  (lvalue, lnext) = lresult
+
+  let rresult = s(lnext)
+  (rvalue, rnext) = rresult
+
+plus("123;")