vim-patch:8.0.0647: syntax highlighting can make cause a freeze

Problem:    Syntax highlighting can make cause a freeze.
Solution:   Apply 'redrawtime' to syntax highlighting, per window.
https://github.com/vim/vim/commit/06f1ed2f78c5c03af95054fc3a8665df39dec362

1 files changed, 4 insertions, 6 deletions

diff --git a/src/nvim/regexp.c b/src/nvim/regexp.c
index c602e7df0f..187609cd22 100644
--- a/src/nvim/regexp.c
+++ b/src/nvim/regexp.c
@@ -5098,8 +5098,6 @@ static int regmatch(
         printf("Premature EOL\n");
 #endif
       }
-      if (status == RA_FAIL)
-        got_int = TRUE;
       return status == RA_MATCH;
     }
 
@@ -7226,7 +7224,7 @@ static void report_re_switch(char_u *pat)
 /// @param nl
 ///
 /// @return TRUE if there is a match, FALSE if not.
-static int vim_regexec_both(regmatch_T *rmp, char_u *line, colnr_T col, bool nl)
+static int vim_regexec_string(regmatch_T *rmp, char_u *line, colnr_T col, bool nl)
 {
   regexec_T rex_save;
   bool rex_in_use_save = rex_in_use;
@@ -7276,7 +7274,7 @@ int vim_regexec_prog(regprog_T **prog, bool ignore_case, char_u *line,
                       colnr_T col)
 {
   regmatch_T regmatch = {.regprog = *prog, .rm_ic = ignore_case};
-  int r = vim_regexec_both(&regmatch, line, col, false);
+  int r = vim_regexec_string(&regmatch, line, col, false);
   *prog = regmatch.regprog;
   return r;
 }
@@ -7285,7 +7283,7 @@ int vim_regexec_prog(regprog_T **prog, bool ignore_case, char_u *line,
 // Return TRUE if there is a match, FALSE if not.
 int vim_regexec(regmatch_T *rmp, char_u *line, colnr_T col)
 {
-  return vim_regexec_both(rmp, line, col, false);
+  return vim_regexec_string(rmp, line, col, false);
 }
 
 // Like vim_regexec(), but consider a "\n" in "line" to be a line break.
@@ -7293,7 +7291,7 @@ int vim_regexec(regmatch_T *rmp, char_u *line, colnr_T col)
 // Return TRUE if there is a match, FALSE if not.
 int vim_regexec_nl(regmatch_T *rmp, char_u *line, colnr_T col)
 {
-  return vim_regexec_both(rmp, line, col, true);
+  return vim_regexec_string(rmp, line, col, true);
 }
 
 /// Match a regexp against multiple lines.