patch 8.2.1890: Vim9: strange error for subtracting from a list
Problem: Vim9: strange error for subtracting from a list.
Solution: Check getting a number, not a string. (closes #7167)
diff --git a/src/eval.c b/src/eval.c
index 9ef3128..bb402de 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -2679,6 +2679,9 @@
return OK;
}
+/*
+ * Make a copy of blob "tv1" and append blob "tv2".
+ */
void
eval_addblob(typval_T *tv1, typval_T *tv2)
{
@@ -2699,6 +2702,9 @@
}
}
+/*
+ * Make a copy of list "tv1" and append list "tv2".
+ */
int
eval_addlist(typval_T *tv1, typval_T *tv2)
{
@@ -2777,8 +2783,10 @@
#ifdef FEAT_FLOAT
&& (op == '.' || rettv->v_type != VAR_FLOAT)
#endif
- )
+ && evaluate)
{
+ int error = FALSE;
+
// For "list + ...", an illegal use of the first operand as
// a number cannot be determined before evaluating the 2nd
// operand: if this is also a list, all is ok.
@@ -2786,7 +2794,9 @@
// we know that the first operand needs to be a string or number
// without evaluating the 2nd operand. So check before to avoid
// side effects after an error.
- if (evaluate && tv_get_string_chk(rettv) == NULL)
+ if (op != '.')
+ tv_get_number_chk(rettv, &error);
+ if ((op == '.' && tv_get_string_chk(rettv) == NULL) || error)
{
clear_tv(rettv);
return FAIL;