From 468e1a1ab096385be0400fb519a0703c13ba29bb Mon Sep 17 00:00:00 2001
From: Nicholas Clark <nick@ccl4.org>
Date: Tue, 2 Aug 2022 08:20:11 +0200
Subject: bisect-runner.pl must stop Configure looping on "does not exit"

This only affects a small range of commits in development releases, but
without this change they can loop infinitely, rather than correctly skipping
(or failing a build test). An infinite loop (with terminal output) is
extremely unhelpful.
---
 Porting/bisect-runner.pl | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'Porting')

diff --git a/Porting/bisect-runner.pl b/Porting/bisect-runner.pl
index 0d32799134..b825b9fe18 100755
--- a/Porting/bisect-runner.pl
+++ b/Porting/bisect-runner.pl
@@ -2507,6 +2507,18 @@ index 4b55fa6..60c3c64 100755
 EOPATCH
     }
 
+    if ($major < 6) {
+        edit_file('Configure', sub {
+                      my $code = shift;
+                      # This will cause a build failure, but it will stop
+                      # Configure looping endlessly trying to get a different
+                      # answer:
+                      $code =~ s{(dflt=)n(\n\s+rp="Function \$ans does not exist)}
+                                {$1y$2};
+                      return $code;
+                  });
+    }
+
     if ($major < 8 && $^O eq 'aix') {
         edit_file('Configure', sub {
                       my $code = shift;
-- 
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