nrvo shouldn't touch bycopy object[backport:1.2] (#19385)

fix nim-lang#19342

2 files changed, 30 insertions, 0 deletions

diff --git a/tests/objects/m19342.c b/tests/objects/m19342.c
new file mode 100644
index 000000000..113f65309
--- /dev/null
+++ b/tests/objects/m19342.c
@@ -0,0 +1,12 @@
+struct Node
+{
+  int data[25];
+};
+
+
+struct Node hello(int name) {
+  struct Node x = {999, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+            0, 1, 2, 3, 4, 5, 6, 7 ,8, 9,
+            1, 2, 3, 4, 5};
+  return x;
+}
\ No newline at end of file
diff --git a/tests/objects/t19342.nim b/tests/objects/t19342.nim
new file mode 100644
index 000000000..d40d15a4b
--- /dev/null
+++ b/tests/objects/t19342.nim
@@ -0,0 +1,18 @@
+discard """
+  targets: "c cpp"
+"""
+
+{.compile: "m19342.c".}
+
+# bug #19342
+type
+  Node* {.bycopy.} = object
+    data: array[25, cint]
+
+proc myproc(name: cint): Node {.importc: "hello", cdecl.}
+
+proc parse =
+  let node = myproc(10)
+  doAssert node.data[0] == 999
+
+parse()