updated for version 7.4.306
Problem:    getchar(0) does not return Esc.
Solution:   Do not wait for an Esc sequence to be complete.  (Yasuhiro
            Matsumoto)
diff --git a/src/eval.c b/src/eval.c
index bc7f22a..3d3c8b4 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -11313,13 +11313,14 @@
 	    n = safe_vgetc();
 	else if (get_tv_number_chk(&argvars[0], &error) == 1)
 	    /* getchar(1): only check if char avail */
-	    n = vpeekc();
-	else if (error || vpeekc() == NUL)
+	    n = vpeekc_any();
+	else if (error || vpeekc_any() == NUL)
 	    /* illegal argument or getchar(0) and no char avail: return zero */
 	    n = 0;
 	else
 	    /* getchar(0) and char avail: return char */
 	    n = safe_vgetc();
+
 	if (n == K_IGNORE)
 	    continue;
 	break;
diff --git a/src/getchar.c b/src/getchar.c
index b39e64d..c4ffb4b 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -1883,7 +1883,7 @@
 }
 #endif
 
-#if defined(FEAT_INS_EXPAND) || defined(PROTO)
+#if defined(FEAT_INS_EXPAND) || defined(FEAT_EVAL) || defined(PROTO)
 /*
  * Check if any character is available, also half an escape sequence.
  * Trick: when no typeahead found, but there is something in the typeahead
diff --git a/src/version.c b/src/version.c
index fcf4127..de58cbd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    306,
+/**/
     305,
 /**/
     304,