vim-patch:8.1.0098: segfault when pattern with \z() is very slow (#9283)

Problem:    Segfault when pattern with \z() is very slow.
Solution:   Check for NULL regprog.  Add "nfa_fail" to test_override() to be
            able to test this.  Fix that 'searchhl' resets called_emsg.
https://github.com/vim/vim/commit/bcf9442307075bac40d44328c8bf7ea21857b138

closes #8788

1 files changed, 11 insertions, 10 deletions

diff --git a/src/nvim/regexp.h b/src/nvim/regexp.h
index 97595c4d29..74ed34188c 100644
--- a/src/nvim/regexp.h
+++ b/src/nvim/regexp.h
@@ -5,19 +5,20 @@
 #include "nvim/buffer_defs.h"
 #include "nvim/regexp_defs.h"
 
-/* Second argument for vim_regcomp(). */
-#define RE_MAGIC        1       /* 'magic' option */
-#define RE_STRING       2       /* match in string instead of buffer text */
-#define RE_STRICT       4       /* don't allow [abc] without ] */
-#define RE_AUTO         8       /* automatic engine selection */
+// Second argument for vim_regcomp().
+#define RE_MAGIC        1       ///< 'magic' option
+#define RE_STRING       2       ///< match in string instead of buffer text
+#define RE_STRICT       4       ///< don't allow [abc] without ]
+#define RE_AUTO         8       ///< automatic engine selection
 
-/* values for reg_do_extmatch */
-#define REX_SET        1       /* to allow \z\(...\), */
-#define REX_USE        2       /* to allow \z\1 et al. */
+// values for reg_do_extmatch
+#define REX_SET        1       ///< to allow \z\(...\),
+#define REX_USE        2       ///< to allow \z\1 et al.
+#define REX_ALL       (REX_SET | REX_USE)
 
-/* regexp.c */
+// regexp.c
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "regexp.h.generated.h"
 #endif
 
-#endif /* NVIM_REGEXP_H */
+#endif  // NVIM_REGEXP_H