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[89.103.14.213]) by smtp.gmail.com with ESMTPSA id d8sm15271412wrw.70.2018.12.04.05.36.52 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 04 Dec 2018 05:36:53 -0800 (PST) Message-ID: Subject: Re: [BUG REPORT] Git does not correctly replay bisect log From: =?UTF-8?Q?Luk=C3=A1=C5=A1_Krej=C4=8D=C3=AD?= To: Christian Couder Cc: git Date: Tue, 04 Dec 2018 14:36:52 +0100 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.30.2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org On Tue, 2018-12-04 at 13:01 +0100, Christian Couder wrote: > To debug I think it would be interesting to see the output of the > following commands just before we get different results: > > git for-each-ref 'refs/bisect/*' > > and > > git log -1 --format=oneline > I placed the following snippet at the end of the loop in bisect_replay(): echo "COMMAND: '$git' '$bisect' '$command' '$rev'" git for-each-ref 'refs/bisect/*' echo "current HEAD: $(git log -1 --format=oneline)" echo "---" $ env GIT_TRACE=0 git bisect replay /var/tmp/git-bisect.log We are not bisecting. COMMAND: 'git' 'bisect' 'start' '' current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- COMMAND: 'git' 'bisect' 'bad' '5b394b2ddf0347bef56e50c69a58773c94343ff3' 5b394b2ddf0347bef56e50c69a58773c94343ff3 commit refs/bisect/bad current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- COMMAND: 'git' 'bisect' 'good' '94710cac0ef4ee177a63b5227664b38c95bbf703' 5b394b2ddf0347bef56e50c69a58773c94343ff3 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- COMMAND: 'git' 'bisect' 'bad' '54dbe75bbf1e189982516de179147208e90b5e45' 54dbe75bbf1e189982516de179147208e90b5e45 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- COMMAND: 'git' 'bisect' 'bad' '0a957467c5fd46142bc9c52758ffc552d4c5e2f7' 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- COMMAND: 'git' 'bisect' 'good' '958f338e96f874a0d29442396d6adf9c1e17aa2d' 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- COMMAND: 'git' 'bisect' 'bad' '2c20443ec221dcb76484b30933593e8ecd836bbd' 2c20443ec221dcb76484b30933593e8ecd836bbd commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- COMMAND: 'git' 'bisect' 'bad' 'c2fc71c9b74c1e87336a27dba1a5edc69d2690f1' c2fc71c9b74c1e87336a27dba1a5edc69d2690f1 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- COMMAND: 'git' 'bisect' 'bad' 'b86d865cb1cae1e61527ea0b8977078bbf694328' b86d865cb1cae1e61527ea0b8977078bbf694328 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- COMMAND: 'git' 'bisect' 'bad' '1b0d274523df5ef1caedc834da055ff721e4d4f0' 1b0d274523df5ef1caedc834da055ff721e4d4f0 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- Bisecting: a merge base must be tested [1e4b044d22517cae7047c99038abb444423243ca] Linux 4.18-rc4 # I placed git for-each-ref 'refs/bisect/*' after each command in the file: $ . /var/tmp/git-bisect.log 5b394b2ddf0347bef56e50c69a58773c94343ff3 commit refs/bisect/bad Bisecting: 6112 revisions left to test after this (roughly 13 steps) [54dbe75bbf1e189982516de179147208e90b5e45] Merge tag 'drm-next-2018-08-15' of git://anongit.freedesktop.org/drm/drm 5b394b2ddf0347bef56e50c69a58773c94343ff3 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 Bisecting: 3881 revisions left to test after this (roughly 12 steps) [0a957467c5fd46142bc9c52758ffc552d4c5e2f7] x86: i8259: Add missing include file 54dbe75bbf1e189982516de179147208e90b5e45 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 Bisecting: 1595 revisions left to test after this (roughly 11 steps) [958f338e96f874a0d29442396d6adf9c1e17aa2d] Merge branch 'l1tf-final' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 Bisecting: 854 revisions left to test after this (roughly 10 steps) [2c20443ec221dcb76484b30933593e8ecd836bbd] Merge tag 'acpi-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d Bisecting: 352 revisions left to test after this (roughly 9 steps) [c2fc71c9b74c1e87336a27dba1a5edc69d2690f1] Merge tag 'mtd/for-4.19' of git://git.infradead.org/linux-mtd 2c20443ec221dcb76484b30933593e8ecd836bbd commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d Bisecting: 193 revisions left to test after this (roughly 8 steps) [b86d865cb1cae1e61527ea0b8977078bbf694328] blkcg: Make blkg_root_lookup() work for queues in bypass mode c2fc71c9b74c1e87336a27dba1a5edc69d2690f1 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d Bisecting: 97 revisions left to test after this (roughly 7 steps) [1b0d274523df5ef1caedc834da055ff721e4d4f0] nvmet: don't use uuid_le type b86d865cb1cae1e61527ea0b8977078bbf694328 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d Bisecting: 47 revisions left to test after this (roughly 6 steps) [6dad38d38f20c0c8a84b5ae4f23c62b2c8758ec5] null_blk: move shared definitions to header file 1b0d274523df5ef1caedc834da055ff721e4d4f0 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d Here is the output of the first command with GIT_TRACE on. $ env GIT_TRACE=1 git bisect replay /var/tmp/git-bisect.log 14:30:26.859355 git.c:659 trace: exec: git-bisect replay /var/tmp/git-bisect.log 14:30:26.859422 run-command.c:643 trace: run_command: git-bisect replay /var/tmp/git-bisect.log 14:30:26.893410 git.c:415 trace: built-in: git rev-parse --git-dir 14:30:26.898676 git.c:415 trace: built-in: git rev-parse --show-cdup 14:30:26.906487 git.c:415 trace: built-in: git rev-parse --git-path objects We are not bisecting. 14:30:26.928736 git.c:415 trace: built-in: git rev-parse --sq-quote 14:30:26.935080 git.c:415 trace: built-in: git rev-parse --is-bare-repository 14:30:26.941601 git.c:415 trace: built-in: git symbolic-ref -q HEAD 14:30:26.949947 git.c:415 trace: built-in: git bisect--helper --bisect-clean-state 14:30:26.961001 git.c:415 trace: built-in: git rev-parse --sq-quote 14:30:26.970945 git.c:415 trace: built-in: git show-ref -q --verify refs/bisect/bad 14:30:26.979838 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/good-*' COMMAND: 'git' 'bisect' 'start' '' 14:30:26.989878 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/*' 14:30:26.997573 git.c:415 trace: built-in: git log -1 --format=oneline current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- 14:30:27.012658 git.c:415 trace: built-in: git bisect--helper --write-terms bad good 14:30:27.021663 git.c:415 trace: built-in: git update-ref refs/bisect/bad 5b394b2ddf0347bef56e50c69a58773c94343ff3 14:30:27.032023 git.c:415 trace: built-in: git show-branch 5b394b2ddf0347bef56e50c69a58773c94343ff3 COMMAND: 'git' 'bisect' 'bad' '5b394b2ddf0347bef56e50c69a58773c94343ff3' 14:30:27.045300 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/*' 5b394b2ddf0347bef56e50c69a58773c94343ff3 commit refs/bisect/bad 14:30:27.055905 git.c:415 trace: built-in: git log -1 --format=oneline current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- 14:30:27.069302 git.c:415 trace: built-in: git update-ref refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 94710cac0ef4ee177a63b5227664b38c95bbf703 14:30:27.080205 git.c:415 trace: built-in: git show-branch 94710cac0ef4ee177a63b5227664b38c95bbf703 COMMAND: 'git' 'bisect' 'good' '94710cac0ef4ee177a63b5227664b38c95bbf703' 14:30:27.091229 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/*' 5b394b2ddf0347bef56e50c69a58773c94343ff3 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 14:30:27.101268 git.c:415 trace: built-in: git log -1 --format=oneline current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- 14:30:27.108474 git.c:415 trace: built-in: git update-ref refs/bisect/bad 54dbe75bbf1e189982516de179147208e90b5e45 14:30:27.117641 git.c:415 trace: built-in: git show-branch 54dbe75bbf1e189982516de179147208e90b5e45 COMMAND: 'git' 'bisect' 'bad' '54dbe75bbf1e189982516de179147208e90b5e45' 14:30:27.126344 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/*' 54dbe75bbf1e189982516de179147208e90b5e45 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 14:30:27.135195 git.c:415 trace: built-in: git log -1 --format=oneline current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- 14:30:27.143550 git.c:415 trace: built-in: git update-ref refs/bisect/bad 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 14:30:27.151005 git.c:415 trace: built-in: git show-branch 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 COMMAND: 'git' 'bisect' 'bad' '0a957467c5fd46142bc9c52758ffc552d4c5e2f7' 14:30:27.157688 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/*' 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 14:30:27.163749 git.c:415 trace: built-in: git log -1 --format=oneline current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- 14:30:27.171138 git.c:415 trace: built-in: git update-ref refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d 958f338e96f874a0d29442396d6adf9c1e17aa2d 14:30:27.177118 git.c:415 trace: built-in: git show-branch 958f338e96f874a0d29442396d6adf9c1e17aa2d COMMAND: 'git' 'bisect' 'good' '958f338e96f874a0d29442396d6adf9c1e17aa2d' 14:30:27.186531 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/*' 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d 14:30:27.199439 git.c:415 trace: built-in: git log -1 --format=oneline current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- 14:30:27.210832 git.c:415 trace: built-in: git update-ref refs/bisect/bad 2c20443ec221dcb76484b30933593e8ecd836bbd 14:30:27.219812 git.c:415 trace: built-in: git show-branch 2c20443ec221dcb76484b30933593e8ecd836bbd COMMAND: 'git' 'bisect' 'bad' '2c20443ec221dcb76484b30933593e8ecd836bbd' 14:30:27.228918 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/*' 2c20443ec221dcb76484b30933593e8ecd836bbd commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d 14:30:27.237583 git.c:415 trace: built-in: git log -1 --format=oneline current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- 14:30:27.246265 git.c:415 trace: built-in: git update-ref refs/bisect/bad c2fc71c9b74c1e87336a27dba1a5edc69d2690f1 14:30:27.257213 git.c:415 trace: built-in: git show-branch c2fc71c9b74c1e87336a27dba1a5edc69d2690f1 COMMAND: 'git' 'bisect' 'bad' 'c2fc71c9b74c1e87336a27dba1a5edc69d2690f1' 14:30:27.268181 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/*' c2fc71c9b74c1e87336a27dba1a5edc69d2690f1 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d 14:30:27.279037 git.c:415 trace: built-in: git log -1 --format=oneline current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- 14:30:27.287349 git.c:415 trace: built-in: git update-ref refs/bisect/bad b86d865cb1cae1e61527ea0b8977078bbf694328 14:30:27.293680 git.c:415 trace: built-in: git show-branch b86d865cb1cae1e61527ea0b8977078bbf694328 COMMAND: 'git' 'bisect' 'bad' 'b86d865cb1cae1e61527ea0b8977078bbf694328' 14:30:27.301385 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/*' b86d865cb1cae1e61527ea0b8977078bbf694328 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d 14:30:27.307179 git.c:415 trace: built-in: git log -1 --format=oneline current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- 14:30:27.312767 git.c:415 trace: built-in: git update-ref refs/bisect/bad 1b0d274523df5ef1caedc834da055ff721e4d4f0 14:30:27.318559 git.c:415 trace: built-in: git show-branch 1b0d274523df5ef1caedc834da055ff721e4d4f0 COMMAND: 'git' 'bisect' 'bad' '1b0d274523df5ef1caedc834da055ff721e4d4f0' 14:30:27.323911 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/*' 1b0d274523df5ef1caedc834da055ff721e4d4f0 commit refs/bisect/bad 94710cac0ef4ee177a63b5227664b38c95bbf703 commit refs/bisect/good-94710cac0ef4ee177a63b5227664b38c95bbf703 958f338e96f874a0d29442396d6adf9c1e17aa2d commit refs/bisect/good-958f338e96f874a0d29442396d6adf9c1e17aa2d 14:30:27.329725 git.c:415 trace: built-in: git log -1 --format=oneline current HEAD: 2595646791c319cadfdbf271563aac97d0843dc7 Linux 4.20-rc5 --- 14:30:27.332326 git.c:415 trace: built-in: git show-ref -q --verify refs/bisect/bad 14:30:27.342139 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/good-*' 14:30:27.348466 git.c:415 trace: built-in: git show-ref -q --verify refs/bisect/bad 14:30:27.355160 git.c:415 trace: built-in: git for-each-ref 'refs/bisect/good-*' 14:30:27.364281 git.c:415 trace: built-in: git bisect--helper --next-all Bisecting: a merge base must be tested 14:30:27.491498 run-command.c:643 trace: run_command: git checkout -q 1e4b044d22517cae7047c99038abb444423243ca -- 14:30:27.497822 git.c:415 trace: built-in: git checkout -q 1e4b044d22517cae7047c99038abb444423243ca -- 14:30:55.290141 run-command.c:643 trace: run_command: git show-branch 1e4b044d22517cae7047c99038abb444423243ca 14:30:55.292168 git.c:415 trace: built-in: git show-branch 1e4b044d22517cae7047c99038abb444423243ca [1e4b044d22517cae7047c99038abb444423243ca] Linux 4.18-rc4