Include output of failing TAP tests into regression diff section

Author: svenklemm

.github/workflows/linux-32bit-build-and-test.yaml

@@ -230,6 +230,11 @@ jobs:
       run: |
         find . -name regression.diffs -exec cat {} + > regression.log
 
+        # TAP tests do not produce regression.diffs; prove summarises the
+        # failing tests and subtests in installcheck.log instead. Surface that
+        # summary here (full per-test logs are in the TAP test logs artifact).
+        sed -n '/^Test Summary Report/,/^Result:/p' installcheck.log >> regression.log 2>/dev/null || true
+
         if [[ -s regression.log ]]; then echo "regression_diff=true" >>$GITHUB_OUTPUT; fi
         grep -e 'FAILED' -e 'failed (ignored)' -e 'not ok' installcheck.log || true
         cat regression.log

.github/workflows/linux-build-and-test.yaml

@@ -267,6 +267,11 @@ jobs:
       run: |
         find . -name regression.diffs -exec cat {} + > regression.log
 
+        # TAP tests do not produce regression.diffs; prove summarises the
+        # failing tests and subtests in installcheck.log instead. Surface that
+        # summary here (full per-test logs are in the TAP test logs artifact).
+        sed -n '/^Test Summary Report/,/^Result:/p' installcheck.log >> regression.log 2>/dev/null || true
+
         if [[ "${{ runner.os }}" == "Linux" ]] ; then
           # wait in case there are in-progress coredumps
           sleep 10

.github/workflows/sanitizer-build-and-test.yaml

@@ -174,6 +174,10 @@ jobs:
       id: collectlogs
       run: |
         find . -name regression.diffs -exec cat {} + > regression.log
+        # TAP tests do not produce regression.diffs; prove summarises the
+        # failing tests and subtests in installcheck.log instead. Surface that
+        # summary here (full per-test logs are in the TAP test logs artifact).
+        sed -n '/^Test Summary Report/,/^Result:/p' installcheck.log >> regression.log 2>/dev/null || true
         if [[ "${{ runner.os }}" == "Linux" ]] ; then
           # wait in case there are in-progress coredumps
           sleep 10