From ee817557ecccf0562cb3e6d4f4c72dcef4fe5e64 Mon Sep 17 00:00:00 2001
From: ringabout <43030857+ringabout@users.noreply.github.com>
Date: Thu, 17 Aug 2023 19:33:19 +0800
Subject: [PATCH] =?UTF-8?q?close=20#22748;=20cursorinference=20+=20-d:nimN?=
 =?UTF-8?q?oLentIterators=20results=20in=20err=E2=80=A6=20(#22495)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

closed #22748; cursorinference + -d:nimNoLentIterators results in erroneous recursion
---
 tests/arc/t22478.nim | 46 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 tests/arc/t22478.nim

diff --git a/tests/arc/t22478.nim b/tests/arc/t22478.nim
new file mode 100644
index 0000000000..5373fa1616
--- /dev/null
+++ b/tests/arc/t22478.nim
@@ -0,0 +1,46 @@
+discard """
+  matrix: "-d:nimNoLentIterators --mm:arc"
+  output: '''PUSH DATA: {"test.message":{"test":{"nested":"v1"}}}'''
+  joinable: false
+"""
+
+# bug #22748
+import std/[json, typetraits, times]
+
+# publish
+
+proc publish*[T](payload: T) =
+  discard
+
+type MetricsPoint* = JsonNode
+
+proc push*(stat: string, data: JsonNode, usec: int64 = 0) =
+  let payload = newJObject()
+
+  # this results in a infinite recursion unless we deepCopy()
+  payload[stat] = data #.deepCopy
+
+  echo "PUSH DATA: ", payload
+
+  publish[MetricsPoint](payload)
+
+var scopes {.threadvar.}: seq[JsonNode]
+
+type WithTimeCallback*[T] = proc(data: var JsonNode): T
+
+proc pushScoped*[T](metric: string, blk: WithTimeCallback[T]): T {.gcsafe.} =
+  scopes.add newJObject()
+  defer: discard scopes.pop()
+
+  let stc = (cpuTime() * 1000_000).int64
+  result = blk(scopes[^1])
+  let dfc = (cpuTime() * 1000_000).int64 - stc
+
+  push(metric, scopes[^1], dfc)
+
+# demo code
+
+discard pushScoped[int]("test.message") do (data: var JsonNode) -> int:
+  data["test"] = %*{
+    "nested": "v1"
+  }
\ No newline at end of file