From bbbb78a4f28fd2378342398ccae60995ae0e08d2 Mon Sep 17 00:00:00 2001
From: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>
Date: Fri, 30 Jan 2026 13:10:42 +0100
Subject: [PATCH] ci: Print verbose build error message in test-each-commit

---
 .github/ci-test-each-commit-exec.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/.github/ci-test-each-commit-exec.py b/.github/ci-test-each-commit-exec.py
index c8ec16ef854..fcd3bbdb546 100755
--- a/.github/ci-test-each-commit-exec.py
+++ b/.github/ci-test-each-commit-exec.py
@@ -43,7 +43,11 @@ def main():
         # Tolerate unused member functions in intermediate commits in a pull request
         "-DCMAKE_CXX_FLAGS=-Wno-error=unused-member-function",
     ])
-    run(["cmake", "--build", build_dir, "-j", str(num_procs)])
+
+    if run(["cmake", "--build", build_dir, "-j", str(num_procs)], check=False).returncode != 0:
+        print("Build failure. Verbose build follows.")
+        run(["cmake", "--build", build_dir, "-j1", "--verbose"])
+
     run([
         "ctest",
         "--output-on-failure",