patch 8.2.1590: Vim9: bufnr() doesn't take "true" argument
Problem: Vim9: bufnr() doesn't take "true" argument.
Solution: use tv_get_bool_chk(). (closes #6863)
diff --git a/src/evalbuffer.c b/src/evalbuffer.c
index 3004415..4ca68c8 100644
--- a/src/evalbuffer.c
+++ b/src/evalbuffer.c
@@ -391,7 +391,7 @@
// new buffer.
if (buf == NULL
&& argvars[1].v_type != VAR_UNKNOWN
- && tv_get_number_chk(&argvars[1], &error) != 0
+ && tv_get_bool_chk(&argvars[1], &error) != 0
&& !error
&& (name = tv_get_string_chk(&argvars[0])) != NULL
&& !error)