From a0b9c5a9bfe938b0aa74eef826fba7e8849a5df0 Mon Sep 17 00:00:00 2001
From: Nikita Popov <npopov@redhat.com>
Date: Fri, 23 Dec 2022 09:40:24 +0100
Subject: [PATCH] Provide more context on FileCheck failures

FileCheck provides 5 lines of context by default. This is often
insufficient to analyze failures that happen in CI. Increase the
amount of context to 100 lines.
---
 src/tools/compiletest/src/runtest.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index 72a43108dc4..dc8b3bce124 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -2299,6 +2299,8 @@ fn verify_with_filecheck(&self, output: &Path) -> ProcRes {
         } else {
             filecheck.args(&["--check-prefixes", &prefixes]);
         }
+        // Provide more context on failures.
+        filecheck.args(&["--dump-input-context", "100"]);
         self.compose_and_run(filecheck, "", None, None)
     }