thac0/vim
1
0
Fork 0
forked from aniani/vim
Code Activity

patch 8.2.5006: asan warns for undefined behavior

Browse Source 
Problem:    Asan warns for undefined behavior.
Solution:   Cast the shifted value to unsigned.
This commit is contained in:
Bram Moolenaar
2022-05-22 22:07:52 +01:00
parent 5b529230f1
commit 68e64d2c17
4 changed files with 6 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/vim9expr.c
View File

@@ -2716,7 +2716,8 @@ compile_expr5(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
if (tv2->vval.v_number > MAX_LSHIFT_BITS)
tv1->vval.v_number = 0;
else if (type == EXPR_LSHIFT)
tv1->vval.v_number = tv1->vval.v_number << tv2->vval.v_number;
tv1->vval.v_number =
(uvarnumber_T)tv1->vval.v_number << tv2->vval.v_number;
else
tv1->vval.v_number =
(uvarnumber_T)tv1->vval.v_number >> tv2->vval.v_number;