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-rw-r--r--src/nvim/option.c4
-rw-r--r--src/nvim/runtime.h1
-rw-r--r--src/nvim/testdir/test_tagfunc.vim2
3 files changed, 7 insertions, 0 deletions
diff --git a/src/nvim/option.c b/src/nvim/option.c
index e67bacce61..72090fdbcc 100644
--- a/src/nvim/option.c
+++ b/src/nvim/option.c
@@ -5157,6 +5157,10 @@ int option_set_callback_func(char *optval, Callback *optcb)
return OK;
}
+ if (strncmp(optval, "s:", 2) == 0 && !SCRIPT_ID_VALID(current_sctx.sc_sid)) {
+ return FAIL;
+ }
+
typval_T *tv;
if (*optval == '{'
|| (strncmp(optval, "function(", 9) == 0)
diff --git a/src/nvim/runtime.h b/src/nvim/runtime.h
index d40bb6c1c1..de363020f8 100644
--- a/src/nvim/runtime.h
+++ b/src/nvim/runtime.h
@@ -79,6 +79,7 @@ typedef struct scriptitem_S {
/// Growarray to store info about already sourced scripts.
extern garray_T script_items;
#define SCRIPT_ITEM(id) (((scriptitem_T *)script_items.ga_data)[(id) - 1])
+#define SCRIPT_ID_VALID(id) ((id) > 0 && (id) <= script_items.ga_len)
typedef void (*DoInRuntimepathCB)(char *, void *);
diff --git a/src/nvim/testdir/test_tagfunc.vim b/src/nvim/testdir/test_tagfunc.vim
index 7a88723bc0..9b4a550945 100644
--- a/src/nvim/testdir/test_tagfunc.vim
+++ b/src/nvim/testdir/test_tagfunc.vim
@@ -1,6 +1,8 @@
" Test 'tagfunc'
source vim9.vim
+source check.vim
+source screendump.vim
func TagFunc(pat, flag, info)
let g:tagfunc_args = [a:pat, a:flag, a:info]