patch 8.2.3173: Vim9: argument types are not checked at compile time
Problem: Vim9: argument types are not checked at compile time.
Solution: Add more type checks. (Yegappan Lakshmanan, closes #8581)
diff --git a/src/diff.c b/src/diff.c
index 6f25c37..4c8afb1 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -3283,7 +3283,7 @@
f_diff_hlID(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_DIFF
- linenr_T lnum = tv_get_lnum(argvars);
+ linenr_T lnum;
static linenr_T prev_lnum = 0;
static varnumber_T changedtick = 0;
static int fnum = 0;
@@ -3293,6 +3293,14 @@
int filler_lines;
int col;
+ if (in_vim9script()
+ && ((argvars[0].v_type != VAR_STRING
+ && argvars[0].v_type != VAR_NUMBER
+ && check_for_string_arg(argvars, 0) == FAIL)
+ || check_for_number_arg(argvars, 1) == FAIL))
+ return;
+
+ lnum = tv_get_lnum(argvars);
if (lnum < 0) // ignore type error in {lnum} arg
lnum = 0;
if (lnum != prev_lnum