commit 68e64d2c1735f2a39afa8a0475ae29bedb116684
author Bram Moolenaar <Bram@vim.org> Sun May 22 22:07:52 2022 +0100
committer Bram Moolenaar <Bram@vim.org> Sun May 22 22:07:52 2022 +0100
tree fc30407cfebef2a874ca6a83f4351ceef025d657
parent 5b529230f144028b67ed1d59207af098c18a1858

patch 8.2.5006: asan warns for undefined behavior

Problem:    Asan warns for undefined behavior.
Solution:   Cast the shifted value to unsigned.

src/eval.c

diff --git a/src/eval.c b/src/eval.c
index 7f90954..1aa0eae 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -3089,7 +3089,7 @@
 		rettv->vval.v_number = 0;
 	    else if (type == EXPR_LSHIFT)
 		rettv->vval.v_number =
-				    rettv->vval.v_number << var2.vval.v_number;
+		      (uvarnumber_T)rettv->vval.v_number << var2.vval.v_number;
 	    else
 		rettv->vval.v_number =
 		      (uvarnumber_T)rettv->vval.v_number >> var2.vval.v_number;