7 files changed, 77 insertions, 34 deletions

diff --git a/t/Makefile b/t/Makefile
index 1bb06c36f2..96317a35f4 100644
--- a/t/Makefile
+++ b/t/Makefile
@@ -8,6 +8,7 @@
 
 #GIT_TEST_OPTS = --verbose --debug
 SHELL_PATH ?= $(SHELL)
+TEST_SHELL_PATH ?= $(SHELL_PATH)
 PERL_PATH ?= /usr/bin/perl
 TAR ?= $(TAR)
 RM ?= rm -f
@@ -23,6 +24,7 @@ endif
 
 # Shell quote;
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
+TEST_SHELL_PATH_SQ = $(subst ','\'',$(TEST_SHELL_PATH))
 PERL_PATH_SQ = $(subst ','\'',$(PERL_PATH))
 TEST_RESULTS_DIRECTORY_SQ = $(subst ','\'',$(TEST_RESULTS_DIRECTORY))
 
@@ -42,11 +44,11 @@ failed:
 	test -z "$$failed" || $(MAKE) $$failed
 
 prove: pre-clean $(TEST_LINT)
-	@echo "*** prove ***"; $(PROVE) --exec '$(SHELL_PATH_SQ)' $(GIT_PROVE_OPTS) $(T) :: $(GIT_TEST_OPTS)
+	@echo "*** prove ***"; $(PROVE) --exec '$(TEST_SHELL_PATH_SQ)' $(GIT_PROVE_OPTS) $(T) :: $(GIT_TEST_OPTS)
 	$(MAKE) clean-except-prove-cache
 
 $(T):
-	@echo "*** $@ ***"; '$(SHELL_PATH_SQ)' $@ $(GIT_TEST_OPTS)
+	@echo "*** $@ ***"; '$(TEST_SHELL_PATH_SQ)' $@ $(GIT_TEST_OPTS)
 
 pre-clean:
 	$(RM) -r '$(TEST_RESULTS_DIRECTORY_SQ)'
diff --git a/t/check-non-portable-shell.pl b/t/check-non-portable-shell.pl
index 03dc9d2852..e07f028437 100755
--- a/t/check-non-portable-shell.pl
+++ b/t/check-non-portable-shell.pl
@@ -21,6 +21,7 @@ while (<>) {
 	/^\s*declare\s+/ and err 'arrays/declare not portable';
 	/^\s*[^#]\s*which\s/ and err 'which is not portable (please use type)';
 	/\btest\s+[^=]*==/ and err '"test a == b" is not portable (please use =)';
+	/\bwc -l.*"\s*=/ and err '`"$(wc -l)"` is not portable (please use test_line_count)';
 	/\bexport\s+[A-Za-z0-9_]*=/ and err '"export FOO=bar" is not portable (please use FOO=bar && export FOO)';
 	# this resets our $. for each file
 	close ARGV if eof;
diff --git a/t/helper/test-lazy-init-name-hash.c b/t/helper/test-lazy-init-name-hash.c
index 6368a89345..297fb01d61 100644
--- a/t/helper/test-lazy-init-name-hash.c
+++ b/t/helper/test-lazy-init-name-hash.c
@@ -112,7 +112,7 @@ static void analyze_run(void)
 {
 	uint64_t t1s, t1m, t2s, t2m;
 	int cache_nr_limit;
-	int nr_threads_used;
+	int nr_threads_used = 0;
 	int i;
 	int nr;
 
diff --git a/t/t5615-alternate-env.sh b/t/t5615-alternate-env.sh
index d2d883f3a1..b4905b822c 100755
--- a/t/t5615-alternate-env.sh
+++ b/t/t5615-alternate-env.sh
@@ -7,9 +7,9 @@ check_obj () {
 	alt=$1; shift
 	while read obj expect
 	do
-		echo "$obj" >&3 &&
-		echo "$obj $expect" >&4
-	done 3>input 4>expect &&
+		echo "$obj" >&5 &&
+		echo "$obj $expect" >&6
+	done 5>input 6>expect &&
 	GIT_ALTERNATE_OBJECT_DIRECTORIES=$alt \
 		git "$@" cat-file --batch-check='%(objectname) %(objecttype)' \
 		<input >actual &&
diff --git a/t/t6044-merge-unrelated-index-changes.sh b/t/t6044-merge-unrelated-index-changes.sh
index 01023486c5..23b86fb977 100755
--- a/t/t6044-merge-unrelated-index-changes.sh
+++ b/t/t6044-merge-unrelated-index-changes.sh
@@ -6,18 +6,21 @@ test_description="merges with unrelated index changes"
 
 # Testcase for some simple merges
 #   A
-#   o-----o B
+#   o-------o B
 #    \
-#     \---o C
+#     \-----o C
 #      \
-#       \-o D
+#       \---o D
 #        \
-#         o E
+#         \-o E
+#          \
+#           o F
 #   Commit A: some file a
 #   Commit B: adds file b, modifies end of a
 #   Commit C: adds file c
 #   Commit D: adds file d, modifies beginning of a
 #   Commit E: renames a->subdir/a, adds subdir/e
+#   Commit F: empty commit
 
 test_expect_success 'setup trivial merges' '
 	test_seq 1 10 >a &&
@@ -29,6 +32,7 @@ test_expect_success 'setup trivial merges' '
 	git branch C &&
 	git branch D &&
 	git branch E &&
+	git branch F &&
 
 	git checkout B &&
 	echo b >b &&
@@ -52,7 +56,10 @@ test_expect_success 'setup trivial merges' '
 	git mv a subdir/a &&
 	echo e >subdir/e &&
 	git add subdir &&
-	test_tick && git commit -m E
+	test_tick && git commit -m E &&
+
+	git checkout F &&
+	test_tick && git commit --allow-empty -m F
 '
 
 test_expect_success 'ff update' '
@@ -105,6 +112,15 @@ test_expect_success 'recursive' '
 	test_must_fail git merge -s recursive C^0
 '
 
+test_expect_success 'recursive, when merge branch matches merge base' '
+	git reset --hard &&
+	git checkout B^0 &&
+
+	touch random_file && git add random_file &&
+
+	test_must_fail git merge -s recursive F^0
+'
+
 test_expect_success 'octopus, unrelated file touched' '
 	git reset --hard &&
 	git checkout B^0 &&
diff --git a/t/t9807-git-p4-submit.sh b/t/t9807-git-p4-submit.sh
index 3457d5db64..71cae2874d 100755
--- a/t/t9807-git-p4-submit.sh
+++ b/t/t9807-git-p4-submit.sh
@@ -460,7 +460,13 @@ test_expect_success 'submit --shelve' '
 	)
 '
 
-# Update an existing shelved changelist
+make_shelved_cl() {
+	test_commit "$1" >/dev/null &&
+	git p4 submit --origin HEAD^ --shelve >/dev/null &&
+	p4 -G changes -s shelved -m 1 | marshal_dump change
+}
+
+# Update existing shelved changelists
 
 test_expect_success 'submit --update-shelve' '
 	test_when_finished cleanup_git &&
@@ -470,21 +476,19 @@ test_expect_success 'submit --update-shelve' '
 		p4 revert ... &&
 		cd "$git" &&
 		git config git-p4.skipSubmitEdit true &&
-		test_commit "test-update-shelved-change" &&
-		git p4 submit --origin=HEAD^ --shelve &&
+		shelved_cl0=$(make_shelved_cl "shelved-change-0") &&
+		echo shelved_cl0=$shelved_cl0 &&
+		shelved_cl1=$(make_shelved_cl "shelved-change-1") &&
 
-		shelf_cl=$(p4 -G changes -s shelved -m 1 |\
-			marshal_dump change) &&
-		test -n $shelf_cl &&
-		echo "updating shelved change list $shelf_cl" &&
+		echo "updating shelved change lists $shelved_cl0 and $shelved_cl1" &&
 
 		echo "updated-line" >>shelf.t &&
 		echo added-file.t >added-file.t &&
 		git add shelf.t added-file.t &&
-		git rm -f test-update-shelved-change.t &&
+		git rm -f shelved-change-1.t &&
 		git commit --amend -C HEAD &&
 		git show --stat HEAD &&
-		git p4 submit -v --origin HEAD^ --update-shelve $shelf_cl &&
+		git p4 submit -v --origin HEAD~2 --update-shelve $shelved_cl0 --update-shelve $shelved_cl1 &&
 		echo "done git p4 submit"
 	) &&
 	(
@@ -494,7 +498,7 @@ test_expect_success 'submit --update-shelve' '
 		p4 unshelve -c $change -s $change &&
 		grep -q updated-line shelf.t &&
 		p4 describe -S $change | grep added-file.t &&
-		test_path_is_missing test-update-shelved-change.t
+		test_path_is_missing shelved-change-1.t
 	)
 '
 
diff --git a/t/test-lib.sh b/t/test-lib.sh
index e7065df2bb..9a0a21f49a 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -80,7 +80,7 @@ done,*)
 	# from any previous runs.
 	>"$GIT_TEST_TEE_OUTPUT_FILE"
 
-	(GIT_TEST_TEE_STARTED=done ${SHELL_PATH} "$0" "$@" 2>&1;
+	(GIT_TEST_TEE_STARTED=done ${TEST_SHELL_PATH} "$0" "$@" 2>&1;
 	 echo $? >"$BASE.exit") | tee -a "$GIT_TEST_TEE_OUTPUT_FILE"
 	test "$(cat "$BASE.exit")" = 0
 	exit
@@ -264,7 +264,6 @@ do
 		shift ;;
 	-x)
 		trace=t
-		verbose=t
 		shift ;;
 	--verbose-log)
 		verbose_log=t
@@ -283,6 +282,11 @@ then
 	test -z "$verbose_log" && verbose=t
 fi
 
+if test -n "$trace" && test -z "$verbose_log"
+then
+	verbose=t
+fi
+
 if test -n "$color"
 then
 	# Save the color control sequences now rather than run tput
@@ -586,7 +590,9 @@ maybe_setup_valgrind () {
 }
 
 want_trace () {
-	test "$trace" = t && test "$verbose" = t
+	test "$trace" = t && {
+		test "$verbose" = t || test "$verbose_log" = t
+	}
 }
 
 # This is a separate function because some tests use
@@ -601,26 +607,40 @@ test_eval_inner_ () {
 }
 
 test_eval_ () {
-	# We run this block with stderr redirected to avoid extra cruft
-	# during a "-x" trace. Once in "set -x" mode, we cannot prevent
+	# If "-x" tracing is in effect, then we want to avoid polluting stderr
+	# with non-test commands. But once in "set -x" mode, we cannot prevent
 	# the shell from printing the "set +x" to turn it off (nor the saving
 	# of $? before that). But we can make sure that the output goes to
 	# /dev/null.
 	#
-	# The test itself is run with stderr put back to &4 (so either to
-	# /dev/null, or to the original stderr if --verbose was used).
+	# There are a few subtleties here:
+	#
+	#   - we have to redirect descriptor 4 in addition to 2, to cover
+	#     BASH_XTRACEFD
+	#
+	#   - the actual eval has to come before the redirection block (since
+	#     it needs to see descriptor 4 to set up its stderr)
+	#
+	#   - likewise, any error message we print must be outside the block to
+	#     access descriptor 4
+	#
+	#   - checking $? has to come immediately after the eval, but it must
+	#     be _inside_ the block to avoid polluting the "set -x" output
+	#
+
+	test_eval_inner_ "$@" </dev/null >&3 2>&4
 	{
-		test_eval_inner_ "$@" </dev/null >&3 2>&4
 		test_eval_ret_=$?
 		if want_trace
 		then
 			set +x
-			if test "$test_eval_ret_" != 0
-			then
-				say_color error >&4 "error: last command exited with \$?=$test_eval_ret_"
-			fi
 		fi
-	} 2>/dev/null
+	} 2>/dev/null 4>&2
+
+	if test "$test_eval_ret_" != 0 && want_trace
+	then
+		say_color error >&4 "error: last command exited with \$?=$test_eval_ret_"
+	fi
 	return $test_eval_ret_
 }