From 1e1f181b82e06fca77d34cedeb927b37e9ef55fa Mon Sep 17 00:00:00 2001
From: Sei Lisa <sei-lisa@email.fake>
Date: Sat, 20 Apr 2024 20:03:58 +0200
Subject: [PATCH] Fix deletion of `if (SEF_expr) ;`

Fixes #29. Thanks @KrsityKu for the test case, which was added to the test suite.
---
 lslopt/lslfoldconst.py                   |  2 +-
 unit_tests/regression.suite/issue-29.lsl | 12 ++++++++++++
 unit_tests/regression.suite/issue-29.out |  7 +++++++
 3 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 unit_tests/regression.suite/issue-29.lsl
 create mode 100644 unit_tests/regression.suite/issue-29.out

diff --git a/lslopt/lslfoldconst.py b/lslopt/lslfoldconst.py
index b86bcb8..6b17a8a 100644
--- a/lslopt/lslfoldconst.py
+++ b/lslopt/lslfoldconst.py
@@ -1819,7 +1819,7 @@ class foldconst(object):
                     # if (X) ;  ->  X;
                     if len(child) == 2:
                         parent[index] = nr(nt='EXPR', t=child[0].t,
-                            ch=[child[0]])
+                            ch=[child[0]], SEF=child[0].SEF)
                         # It has been promoted to statement. Fold it as such.
                         # (Will remove it if SEF)
                         self.FoldStmt(parent, index)
diff --git a/unit_tests/regression.suite/issue-29.lsl b/unit_tests/regression.suite/issue-29.lsl
new file mode 100644
index 0000000..9cd330c
--- /dev/null
+++ b/unit_tests/regression.suite/issue-29.lsl
@@ -0,0 +1,12 @@
+default
+{
+    touch(integer num)
+    {
+        integer dead = 0;
+        if (num == 5)
+            dead = 1;
+        else
+            dead = 2;
+        llOwnerSay("Not Dead");
+    }
+}
diff --git a/unit_tests/regression.suite/issue-29.out b/unit_tests/regression.suite/issue-29.out
new file mode 100644
index 0000000..6dbd3c3
--- /dev/null
+++ b/unit_tests/regression.suite/issue-29.out
@@ -0,0 +1,7 @@
+default
+{
+    touch(integer num)
+    {
+        llOwnerSay("Not Dead");
+    }
+}