diff options
| author | Billy Su <g4691821@gmail.com> | 2019-03-02 12:38:36 +0800 |
|---|---|---|
| committer | Billy Su <g4691821@gmail.com> | 2019-03-07 23:48:53 +0800 |
| commit | fbd8209286373843b7e9b4151a1432fc4555484d (patch) | |
| tree | ed434d5f07975fe4bc4b52ba401254e55b7c523d /src/nvim/regexp_nfa.c | |
| parent | 570e41fc08ae80421c2458d90cd14d7c3ba65d76 (diff) | |
| download | rneovim-fbd8209286373843b7e9b4151a1432fc4555484d.tar.gz rneovim-fbd8209286373843b7e9b4151a1432fc4555484d.tar.bz2 rneovim-fbd8209286373843b7e9b4151a1432fc4555484d.zip | |
vim-patch:8.0.0645: no error for illegal back reference in NFA engine
Problem: The new regexp engine does not give an error for using a back
reference where it is not allowed. (Dominique Pelle)
Solution: Check the back reference like the old engine. (closes vim/vim#1774)
https://github.com/vim/vim/commit/1ef9bbe215e13a273e74fccaddd8fc5a42c76b6e
Diffstat (limited to 'src/nvim/regexp_nfa.c')
| -rw-r--r-- | src/nvim/regexp_nfa.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/nvim/regexp_nfa.c b/src/nvim/regexp_nfa.c index 0df67336d3..c44e0c9979 100644 --- a/src/nvim/regexp_nfa.c +++ b/src/nvim/regexp_nfa.c @@ -1338,8 +1338,14 @@ static int nfa_regatom(void) case Magic('7'): case Magic('8'): case Magic('9'): - EMIT(NFA_BACKREF1 + (no_Magic(c) - '1')); - nfa_has_backref = TRUE; + { + int refnum = no_Magic(c) - '1'; + + if (!seen_endbrace(refnum + 1)) + return FAIL; + EMIT(NFA_BACKREF1 + refnum); + nfa_has_backref = TRUE; + } break; case Magic('z'): |