commit 3747f6b6ab20ac9082909dd0cb3376e4e35f2c6c
Author: Barton E. Schaefer <schaefer@zsh.org>
Date:   Tue Sep 1 11:26:06 2015 -0700

    36376: handle signals during read1char() so it is possible to interrupt correct/correctall prompts

diff --git a/Src/utils.c b/Src/utils.c
index 4c4dc55..90f7c33 100644
--- a/Src/utils.c
+++ b/Src/utils.c
@@ -2538,11 +2538,16 @@ static int
 read1char(int echo)
 {
     char c;
+    int q = queue_signal_level();
 
+    dont_queue_signals();
     while (read(SHTTY, &c, 1) != 1) {
-	if (errno != EINTR || errflag || retflag || breaks || contflag)
+	if (errno != EINTR || errflag || retflag || breaks || contflag) {
+	    restore_queue_signals(q);
 	    return -1;
+	}
     }
+    restore_queue_signals(q);
     if (echo)
 	write_loop(SHTTY, &c, 1);
     return STOUC(c);