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-rw-r--r--src/nvim/regexp.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/src/nvim/regexp.c b/src/nvim/regexp.c
index 9a04cc428a..b61c9a2cf5 100644
--- a/src/nvim/regexp.c
+++ b/src/nvim/regexp.c
@@ -2504,7 +2504,8 @@ long vim_regexec_multi(
char_u *pat = vim_strsave(((nfa_regprog_T *)rmp->regprog)->pattern);
p_re = BACKTRACKING_ENGINE;
- vim_regfree(rmp->regprog);
+ regprog_T *prev_prog = rmp->regprog;
+
report_re_switch(pat);
// checking for \z misuse was already done when compiling for NFA,
// allow all here
@@ -2512,7 +2513,13 @@ long vim_regexec_multi(
rmp->regprog = vim_regcomp(pat, re_flags);
reg_do_extmatch = 0;
- if (rmp->regprog != NULL) {
+ if (rmp->regprog == NULL) {
+ // Somehow compiling the pattern failed now, put back the
+ // previous one to avoid "regprog" becoming NULL.
+ rmp->regprog = prev_prog;
+ } else {
+ vim_regfree(prev_prog);
+
rmp->regprog->re_in_use = true;
result = rmp->regprog->engine->regexec_multi(rmp, win, buf, lnum, col,
tm, timed_out);