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| author | Bram Moolenaar <Bram@vim.org> | 2017-06-17 20:08:20 +0200 |
|---|---|---|
| committer | Bram Moolenaar <Bram@vim.org> | 2017-06-17 20:08:20 +0200 |
| commit | 1ef9bbe215e13a273e74fccaddd8fc5a42c76b6e (patch) | |
| tree | e7e91f215db3694732b431b3ff76eaa6008827d2 /src/regexp_nfa.c | |
| parent | 5b1affefd0e96154517ec6f71300086ae6d22d24 (diff) | |
| download | vim-git-1ef9bbe215e13a273e74fccaddd8fc5a42c76b6e.tar.gz | |
patch 8.0.0645: no error for illegal back reference in NFA enginev8.0.0645
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 #1774)
Diffstat (limited to 'src/regexp_nfa.c')
| -rw-r--r-- | src/regexp_nfa.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/regexp_nfa.c b/src/regexp_nfa.c index 5ba80f2fe..804d742ab 100644 --- a/src/regexp_nfa.c +++ b/src/regexp_nfa.c @@ -1446,8 +1446,14 @@ 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'): |