fix(runtime): do not allow breakcheck inside runtime path calculation

problem: breakcheck might run arbitrary lua code, which might require
modules and thus invoke runtime path calculation recursively.
solution: Block the use of breakcheck when expanding glob patterns
inside 'runtimepath'

fixes #23012

1 files changed, 3 insertions, 2 deletions

diff --git a/src/nvim/regexp_bt.c b/src/nvim/regexp_bt.c
index af3d93f7c4..a6f554d4ae 100644
--- a/src/nvim/regexp_bt.c
+++ b/src/nvim/regexp_bt.c
@@ -3539,7 +3539,7 @@ static bool regmatch(uint8_t *scan, proftime_T *tm, int *timed_out)
   for (;;) {
     // Some patterns may take a long time to match, e.g., "\([a-z]\+\)\+Q".
     // Allow interrupting them with CTRL-C.
-    fast_breakcheck();
+    reg_breakcheck();
 
 #ifdef REGEXP_DEBUG
     if (scan != NULL && regnarrate) {
@@ -4792,7 +4792,7 @@ static bool regmatch(uint8_t *scan, proftime_T *tm, int *timed_out)
                   break;
                 }
                 rex.input = rex.line + strlen((char *)rex.line);
-                fast_breakcheck();
+                reg_breakcheck();
               } else {
                 MB_PTR_BACK(rex.line, rex.input);
               }
@@ -5155,6 +5155,7 @@ static int bt_regexec_nl(regmatch_T *rmp, uint8_t *line, colnr_T col, bool line_
   rex.reg_win = NULL;
   rex.reg_ic = rmp->rm_ic;
   rex.reg_icombine = false;
+  rex.reg_nobreak = rmp->regprog->re_flags & RE_NOBREAK;
   rex.reg_maxcol = 0;
 
   long r = bt_regexec_both(line, col, NULL, NULL);