From: Markus Elfring <Markus.Elfring@web.de> To: Nathan Lynch <nathanl@linux.ibm.com>, linuxppc-dev@lists.ozlabs.org, kernel-janitors@vger.kernel.org Cc: cocci@inria.fr, LKML <linux-kernel@vger.kernel.org>, Christophe Leroy <christophe.leroy@csgroup.eu>, Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>, Paul Moore <paul@paul-moore.com> Subject: Re: [cocci] powerpc/pseries: Fix exception handling in pSeries_reconfig_add_node() Date: Sat, 18 Mar 2023 08:30:24 +0100 [thread overview] Message-ID: <2f5a00f6-f3fb-9f00-676a-acdcbef90c6c@web.de> (raw) In-Reply-To: <87v8iz75ck.fsf@linux.ibm.com> >>>> The label “out_err” was used to jump to another pointer check despite of >>>> the detail in the implementation of the function “pSeries_reconfig_add_node” >>>> that it was determined already that the corresponding variable contained >>>> a null pointer (because of a failed function call in two cases). >>>> >>>> 1. Thus return directly after a call of the function “kzalloc” failed. >>>> >>>> 2. Use more appropriate labels instead. >>>> >>>> 3. Delete a redundant check. >>>> >>>> 4. Omit an explicit initialisation for the local variable “err”. >>>> >>>> This issue was detected by using the Coccinelle software. >>> Is there a correctness or safety issue here? >> I got the impression that the application of only a single label like “out_err” >> resulted in improvable implementation details. > I don't understand what you're trying to say here. What does hinder you to understand the presented change description better at the moment? > It doesn't seem to answer my question. I hope that my answer will trigger further helpful considerations. >>> The subject uses the word "fix" but the commit message doesn't seem to identify one. >> Can you find the proposed adjustments reasonable? > In the absence of a bug fix or an improvement in readability, not really, sorry. The views are varying for “programming bugs”, aren't they? > It adds to the function more goto labels and another return, This is the suggested source code transformation. > apparently to avoid checks Can the support grow for such a programming goal? > that are sometimes redundant Can such implementation details become undesirable? > (but not incorrect) at the C source code level. Will this aspect affect further development concerns? >> Please take another look at available information sources. >> https://lore.kernel.org/cocci/f9303bdc-b1a7-be5e-56c6-dfa8232b8b55@web.de/ > I wasn't cc'd on this and I'm not subscribed to any lists in the recipients > for that message, so not sure how I would take "another" look. :-) I imagine that you can benefit more from information which can be retrieved by archive interfaces also according to the mailing list of the Coccinelle software. See also: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/dev-tools/coccinelle.rst?h=v6.3-rc2#n9 Regards, Markus
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From: Markus Elfring <Markus.Elfring@web.de> To: Nathan Lynch <nathanl@linux.ibm.com>, linuxppc-dev@lists.ozlabs.org, kernel-janitors@vger.kernel.org Cc: Paul Moore <paul@paul-moore.com>, LKML <linux-kernel@vger.kernel.org>, Nicholas Piggin <npiggin@gmail.com>, cocci@inria.fr Subject: Re: powerpc/pseries: Fix exception handling in pSeries_reconfig_add_node() Date: Sat, 18 Mar 2023 08:30:24 +0100 [thread overview] Message-ID: <2f5a00f6-f3fb-9f00-676a-acdcbef90c6c@web.de> (raw) In-Reply-To: <87v8iz75ck.fsf@linux.ibm.com> >>>> The label “out_err” was used to jump to another pointer check despite of >>>> the detail in the implementation of the function “pSeries_reconfig_add_node” >>>> that it was determined already that the corresponding variable contained >>>> a null pointer (because of a failed function call in two cases). >>>> >>>> 1. Thus return directly after a call of the function “kzalloc” failed. >>>> >>>> 2. Use more appropriate labels instead. >>>> >>>> 3. Delete a redundant check. >>>> >>>> 4. Omit an explicit initialisation for the local variable “err”. >>>> >>>> This issue was detected by using the Coccinelle software. >>> Is there a correctness or safety issue here? >> I got the impression that the application of only a single label like “out_err” >> resulted in improvable implementation details. > I don't understand what you're trying to say here. What does hinder you to understand the presented change description better at the moment? > It doesn't seem to answer my question. I hope that my answer will trigger further helpful considerations. >>> The subject uses the word "fix" but the commit message doesn't seem to identify one. >> Can you find the proposed adjustments reasonable? > In the absence of a bug fix or an improvement in readability, not really, sorry. The views are varying for “programming bugs”, aren't they? > It adds to the function more goto labels and another return, This is the suggested source code transformation. > apparently to avoid checks Can the support grow for such a programming goal? > that are sometimes redundant Can such implementation details become undesirable? > (but not incorrect) at the C source code level. Will this aspect affect further development concerns? >> Please take another look at available information sources. >> https://lore.kernel.org/cocci/f9303bdc-b1a7-be5e-56c6-dfa8232b8b55@web.de/ > I wasn't cc'd on this and I'm not subscribed to any lists in the recipients > for that message, so not sure how I would take "another" look. :-) I imagine that you can benefit more from information which can be retrieved by archive interfaces also according to the mailing list of the Coccinelle software. See also: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/dev-tools/coccinelle.rst?h=v6.3-rc2#n9 Regards, Markus
next prev parent reply other threads:[~2023-03-18 7:30 UTC|newest] Thread overview: 197+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-03-15 17:36 [cocci] Reconsidering repeated pointer checks with SmPL Markus Elfring 2023-03-16 20:07 ` [cocci] [PATCH 0/4] powerpc/4xx: Adjustments for four function implementations Markus Elfring 2023-03-16 20:07 ` Markus Elfring 2023-03-16 20:10 ` [PATCH 1/4] powerpc/4xx: Fix exception handling in ppc4xx_pciex_port_setup_hose() Markus Elfring 2023-03-16 20:14 ` [PATCH 2/4] powerpc/4xx: Fix exception handling in ppc4xx_probe_pcix_bridge() Markus Elfring 2023-03-16 20:16 ` [PATCH 3/4] powerpc/4xx: Fix exception handling in ppc4xx_probe_pci_bridge() Markus Elfring 2023-03-16 20:18 ` [PATCH 4/4] powerpc/4xx: Delete unnecessary variable initialisations in four functions Markus Elfring 2023-03-25 15:30 ` [cocci] [PATCH v2 0/4] powerpc/4xx: Adjustments for four function implementations Markus Elfring 2023-03-25 15:30 ` Markus Elfring 2023-03-25 15:36 ` [cocci] [PATCH v2 1/4] powerpc/4xx: Fix exception handling in ppc4xx_pciex_port_setup_hose() Markus Elfring 2023-03-25 15:36 ` Markus Elfring 2023-03-25 15:38 ` [cocci] [PATCH v2 2/4] powerpc/4xx: Fix exception handling in ppc4xx_probe_pcix_bridge() Markus Elfring 2023-03-25 15:38 ` Markus Elfring 2023-03-25 15:40 ` [cocci] [PATCH v2 3/4] powerpc/4xx: Fix exception handling in ppc4xx_probe_pci_bridge() Markus Elfring 2023-03-25 15:40 ` Markus Elfring 2023-03-25 15:42 ` [cocci] [PATCH v2 4/4] powerpc/4xx: Delete unnecessary variable initialisations in four functions Markus Elfring 2023-03-25 15:42 ` Markus Elfring 2024-01-05 17:42 ` [PATCH v2 0/4] powerpc/4xx: Adjustments for four function implementations Markus Elfring 2024-01-05 17:42 ` Markus Elfring 2024-01-05 17:42 ` [cocci] " Markus Elfring 2023-03-17 8:50 ` [PATCH] powerpc/pseries: Fix exception handling in pSeries_reconfig_add_node() Markus Elfring 2023-03-17 13:11 ` Nathan Lynch 2023-03-17 13:11 ` [cocci] " Nathan Lynch 2023-03-17 13:11 ` Nathan Lynch 2023-03-17 14:20 ` [cocci] " Markus Elfring 2023-03-17 14:20 ` Markus Elfring 2023-03-17 15:41 ` Nathan Lynch 2023-03-17 15:41 ` [cocci] " Nathan Lynch 2023-03-17 15:41 ` Nathan Lynch 2023-03-18 7:30 ` Markus Elfring [this message] 2023-03-18 7:30 ` Markus Elfring 2023-03-20 15:38 ` Nathan Lynch 2023-03-20 15:38 ` [cocci] " Nathan Lynch 2023-03-20 15:38 ` Nathan Lynch 2023-03-21 6:54 ` [cocci] " Markus Elfring 2023-03-21 6:54 ` Markus Elfring 2023-03-21 10:30 ` [cocci] [PATCH v2 0/2] powerpc/pseries: Fixes for " Markus Elfring 2023-03-21 10:30 ` Markus Elfring 2023-03-21 10:33 ` [PATCH v2 1/2] powerpc/pseries: Do not pass an error pointer to of_node_put() " Markus Elfring 2023-03-21 10:36 ` [PATCH v2 2/2] powerpc/pseries: Fix exception handling " Markus Elfring 2023-03-25 13:40 ` [cocci] [PATCH resent v2 0/2] powerpc/pseries: Fixes for " Markus Elfring 2023-03-25 13:40 ` Markus Elfring 2023-03-25 13:42 ` [cocci] [PATCH resent v2 1/2] powerpc/pseries: Do not pass an error pointer to of_node_put() " Markus Elfring 2023-03-25 13:42 ` Markus Elfring 2023-03-25 13:44 ` [cocci] [PATCH resent v2 2/2] powerpc/pseries: Fix exception handling " Markus Elfring 2023-03-25 13:44 ` Markus Elfring 2024-01-05 17:19 ` [cocci] [PATCH resent v2 0/2] powerpc/pseries: Fixes for " Markus Elfring 2024-01-05 17:19 ` Markus Elfring 2024-01-05 17:19 ` Markus Elfring [not found] ` <afe30fc6-04c9-528c-f84a-67902b5a6ed8@web.de> 2023-03-19 11:40 ` [PATCH] RDMA/siw: Fix exception handling in siw_accept_newconn() Leon Romanovsky 2023-03-19 11:40 ` [cocci] " Leon Romanovsky [not found] ` <1c06e86d-1468-c11a-8344-9563ad6047b5@web.de> 2023-03-19 14:11 ` Leon Romanovsky 2023-03-19 14:11 ` [cocci] " Leon Romanovsky [not found] ` <a03c1d04-a41e-7722-c36a-bd6f61094702@web.de> 2023-03-19 17:37 ` Leon Romanovsky 2023-03-20 8:19 ` [cocci] " Markus Elfring [not found] ` <f0f96f74-21d1-f5bf-1086-1c3ce0ea18f5@web.de> 2023-03-19 11:41 ` [PATCH] RDMA/erdma: Fix exception handling in erdma_accept_newconn() Leon Romanovsky 2023-03-19 11:41 ` [cocci] " Leon Romanovsky 2023-03-19 13:36 ` Cheng Xu 2023-03-19 13:36 ` [cocci] " Cheng Xu 2023-03-19 14:00 ` Markus Elfring 2023-03-19 20:00 ` [cocci] [PATCH 0/2] irqchip/gic-v4: Adjustments for two function implementations Markus Elfring 2023-03-25 10:25 ` [cocci] [PATCH resent " Markus Elfring 2023-03-25 10:27 ` [cocci] [PATCH resent 1/2] irqchip/gic-v4: Fix exception handling in its_alloc_vcpu_irqs() Markus Elfring 2023-03-25 10:30 ` [cocci] [PATCH resent 2/2] irqchip/gic-v4: Fix exception handling in its_alloc_vcpu_sgis() Markus Elfring [not found] ` <521b63e1-9470-58ef-599e-50a1846e5380@web.de> 2023-03-20 4:21 ` [PATCH] Input: iforce - Fix exception handling in iforce_usb_probe() Dmitry Torokhov 2023-03-20 4:34 ` Tetsuo Handa 2023-03-20 6:05 ` Dmitry Torokhov 2023-03-25 10:12 ` [cocci] [PATCH resent] " Markus Elfring 2023-03-20 8:55 ` [cocci] [PATCH] " Markus Elfring 2023-03-20 16:47 ` [cocci] [PATCH 0/2] md/raid: Adjustments for two function implementations Markus Elfring 2023-03-25 9:20 ` [cocci] [PATCH resent " Markus Elfring 2023-03-25 9:22 ` [cocci] [PATCH resent 1/2] md/raid1: Fix exception handling in setup_conf() Markus Elfring 2023-03-25 9:24 ` [cocci] [PATCH resent 2/2] md/raid10: " Markus Elfring 2023-03-28 23:21 ` [PATCH resent 0/2] md/raid: Adjustments for two function implementations Song Liu 2023-03-29 5:32 ` [cocci] [0/2] " Markus Elfring 2023-03-29 19:03 ` Song Liu 2023-03-21 16:07 ` [cocci] [PATCH 0/3] scsi: message: fusion: Adjustments for four " Markus Elfring 2023-03-25 9:00 ` [cocci] [PATCH resent " Markus Elfring 2023-03-25 9:03 ` [cocci] [PATCH resent 1/3] scsi: message: fusion: Return directly after input data validation failed in four functions Markus Elfring 2023-03-25 9:07 ` [cocci] [PATCH resent 2/3] scsi: message: fusion: Delete a redundant pointer check " Markus Elfring 2023-03-25 9:10 ` [cocci] [PATCH resent 3/3] scsi: message: fusion: Delete an unnecessary variable initialisation " Markus Elfring [not found] ` <e3aaeecf-8e74-2e74-c58a-d80e153e98f9@web.de> 2023-03-22 9:36 ` [PATCH] media: hantro: HEVC: Fix exception handling in tile_buffer_reallocate() Benjamin Gaignard 2023-03-22 9:36 ` [cocci] " Benjamin Gaignard 2023-03-22 9:36 ` Benjamin Gaignard 2023-03-22 14:45 ` [cocci] " Markus Elfring 2023-03-22 14:45 ` Markus Elfring 2023-03-22 19:20 ` [cocci] [PATCH] btrfs: Fix exception handling in relocating_repair_kthread() Markus Elfring 2023-03-25 8:25 ` [cocci] [PATCH resent] " Markus Elfring 2023-03-22 21:20 ` [cocci] [PATCH] ufs: Fix exception handling in ufs_fill_super() Markus Elfring 2023-03-25 8:32 ` [cocci] [PATCH resent] " Markus Elfring 2023-03-23 17:30 ` [PATCH] mm/mempolicy: Fix exception handling in shared_policy_replace() Markus Elfring 2023-03-23 17:30 ` [cocci] " Markus Elfring 2023-03-24 17:30 ` Vlastimil Babka 2023-03-24 17:30 ` [cocci] " Vlastimil Babka 2023-03-24 18:03 ` Markus Elfring 2023-03-24 18:03 ` [cocci] " Markus Elfring 2023-03-23 21:12 ` [cocci] [PATCH] perf cputopo: Improve exception handling in build_cpu_topology() Markus Elfring 2023-03-25 8:50 ` [cocci] [PATCH resent] " Markus Elfring 2023-03-24 11:43 ` [cocci] [PATCH] perf pmu: Improve exception handling in pmu_lookup() Markus Elfring 2023-03-24 14:12 ` [cocci] [PATCH] selftests/bpf: Improve exception handling in rbtree_add_and_remove() Markus Elfring 2023-03-24 20:07 ` Alexei Starovoitov [not found] ` <e6656c83-ee7a-a253-2028-109138779c94@web.de> 2023-03-24 15:42 ` [cocci] [PATCH resent] drm/amd/display: Fix exception handling in dm_validate_stream_and_context() Markus Elfring 2023-03-24 15:42 ` Markus Elfring 2023-03-24 17:46 ` Hamza Mahfooz 2023-03-24 18:19 ` [cocci] " Markus Elfring 2023-03-24 18:19 ` Markus Elfring 2023-03-24 18:33 ` Hamza Mahfooz [not found] ` <7214c986-4d0e-ad78-6312-c84515dc9abf@web.de> 2023-03-24 17:02 ` [cocci] [PATCH resent] ext4: Fix exception handling in parse_apply_sb_mount_options() Markus Elfring [not found] ` <e33f264a-7ee9-4ebc-d58e-bbb7fd567198@web.de> 2023-03-25 9:31 ` [cocci] [PATCH resent] bcache: Fix exception handling in mca_alloc() Markus Elfring 2023-03-25 10:16 ` Coly Li 2023-03-25 12:21 ` [cocci] [PATCH v2] " Markus Elfring 2023-03-25 16:07 ` Coly Li 2023-03-25 17:10 ` [cocci] " Markus Elfring 2023-03-25 12:50 ` [cocci] [PATCH resent] " Markus Elfring [not found] ` <00589154-00ac-4ed5-2a37-60b3c6f6c523@web.de> 2023-03-25 9:40 ` [cocci] [PATCH resent] mei: Fix exception handling in mei_cl_irq_read_msg() Markus Elfring 2023-03-25 11:51 ` Winkler, Tomas [not found] ` <3675f707-bff0-3caf-29a2-b99e5b9c6554@web.de> 2023-03-25 9:43 ` [PATCH resent] mtd: cfi_cmdset_0001: Fix exception handling in cfi_intelext_setup() Markus Elfring 2023-03-25 9:43 ` [cocci] " Markus Elfring [not found] ` <21e58abb-f215-b9b7-ffe8-236dd40c6bd2@web.de> 2023-03-25 9:50 ` [cocci] [PATCH resent] bbc_i2c: Fix exception handling in attach_one_i2c() Markus Elfring [not found] ` <15fa53e5-916f-dac8-87fb-9cb81021418c@web.de> 2023-03-25 10:20 ` [cocci] [PATCH resent] irqchip/partitions: Fix exception handling in partition_create_desc() Markus Elfring [not found] ` <eaa9f90f-c91b-dc87-51a1-d97f99fc5b4b@web.de> 2023-03-25 14:00 ` [cocci] [PATCH resent] dmaengine: bestcomm: Fix exception handling in bcom_task_alloc() Markus Elfring [not found] ` <b3cce5b3-2e68-180c-c293-74d4d9d4032c@web.de> 2023-03-25 14:02 ` [cocci] [PATCH resent] cpufreq: sparc: Fix exception handling in two functions Markus Elfring 2023-04-03 3:35 ` Viresh Kumar 2023-04-03 12:50 ` [cocci] [PATCH] " Markus Elfring 2023-04-03 23:04 ` Viresh Kumar 2023-04-07 17:48 ` [cocci] [PATCH v2] " Markus Elfring 2023-04-09 23:55 ` Viresh Kumar 2023-04-10 13:08 ` [cocci] [v2] " Markus Elfring 2023-04-11 3:30 ` Viresh Kumar 2023-04-11 6:15 ` [cocci] " Markus Elfring 2023-04-11 6:40 ` Viresh Kumar 2023-04-11 14:20 ` [cocci] " Markus Elfring [not found] ` <5ed1bc78-77a1-8eb8-43f9-6005d7de49c8@web.de> 2023-03-25 14:05 ` [cocci] [PATCH resent] clk: at91: sama7g5: Add two jump labels in sama7g5_pmc_setup() Markus Elfring 2023-03-25 14:05 ` Markus Elfring 2023-03-28 8:30 ` Nicolas Ferre 2023-03-28 8:30 ` Nicolas Ferre 2023-03-28 19:24 ` [cocci] " Markus Elfring 2023-03-28 19:24 ` Markus Elfring 2023-03-28 22:02 ` Alexandre Belloni 2023-03-28 22:02 ` Alexandre Belloni [not found] ` <8d193937-532f-959f-9b84-d911984508aa@web.de> 2023-03-25 14:07 ` [cocci] [PATCH resent] drbd: Fix exception handling in nla_put_drbd_cfg_context() Markus Elfring 2023-03-27 12:28 ` Christoph Böhmwalder 2023-03-27 12:28 ` [cocci] " Christoph Böhmwalder 2023-03-27 17:26 ` [cocci] " Markus Elfring [not found] ` <3151f1ef-63c6-d016-7c6a-2572e3d93d8f@web.de> 2023-03-25 14:10 ` [cocci] [PATCH resent] blk-mq: Add two labels in blk_rq_prep_clone() Markus Elfring [not found] ` <ab860edf-79ca-2035-c5a3-d25be6fd9dac@web.de> 2023-03-25 14:15 ` [cocci] [PATCH resent] perf/x86/amd/uncore: Fix exception handling in amd_uncore_cpu_up_prepare() Markus Elfring 2023-03-27 9:11 ` Adrian Hunter 2023-03-27 14:58 ` Peter Zijlstra 2023-03-27 17:36 ` [cocci] " Markus Elfring 2023-03-25 18:30 ` [PATCH] selftests: cgroup: Fix exception handling in test_memcg_oom_group_score_events() Markus Elfring 2023-03-25 18:30 ` [cocci] " Markus Elfring 2023-03-25 19:24 ` Lorenzo Stoakes 2023-03-25 19:24 ` Lorenzo Stoakes 2023-03-26 8:15 ` Markus Elfring 2023-03-26 8:15 ` [cocci] " Markus Elfring 2023-03-26 21:39 ` David Vernet 2023-03-26 21:39 ` David Vernet 2023-03-27 5:56 ` Markus Elfring 2023-03-27 5:56 ` [cocci] " Markus Elfring 2023-03-27 9:13 ` David Vernet 2023-03-26 8:20 ` [cocci] [PATCH] selinux: Improve exception handling in security_get_bools() Markus Elfring [not found] ` <tencent_1C472DFEAAEC903262297C9B9C978B365909@qq.com> 2023-03-27 5:25 ` [cocci] " Markus Elfring 2023-03-27 7:00 ` [cocci] [PATCH v2] selinux: Adjust implementation of security_get_bools() Markus Elfring 2023-03-27 21:37 ` Paul Moore 2023-03-27 22:08 ` Paul Moore 2023-03-28 7:30 ` [cocci] " Markus Elfring 2023-03-28 19:59 ` Paul Moore 2023-03-29 5:20 ` [cocci] " Markus Elfring 2023-03-29 14:19 ` Paul Moore 2023-04-04 8:00 ` [cocci] Reconsidering repeated checks for error pointers (with SmPL) Markus Elfring 2023-04-05 17:10 ` [cocci] [PATCH] drm/nouveau: Add a jump label in nouveau_gem_ioctl_pushbuf() Markus Elfring 2023-04-05 17:10 ` [Nouveau] " Markus Elfring 2023-04-05 17:10 ` Markus Elfring 2023-04-05 20:10 ` [cocci] [PATCH] firmware: ti_sci: Fix exception handling in ti_sci_probe() Markus Elfring 2023-04-05 20:10 ` Markus Elfring 2023-05-16 15:20 ` [cocci] " Nishanth Menon 2023-05-16 15:20 ` Nishanth Menon 2023-05-16 15:56 ` [cocci] " Markus Elfring 2023-05-16 15:56 ` Markus Elfring 2023-05-17 6:43 ` [cocci] [PATCH] " Dan Carpenter 2023-05-17 6:43 ` Dan Carpenter 2023-04-06 16:10 ` [cocci] [PATCH 0/2] IB/uverbs: Adjustments for create_qp() Markus Elfring 2023-04-06 16:14 ` [cocci] [PATCH 1/2] IB/uverbs: Improve exception handling in create_qp() Markus Elfring 2023-04-06 16:18 ` [cocci] [PATCH 2/2] IB/uverbs: Delete a duplicate check " Markus Elfring 2023-04-09 9:59 ` [PATCH 0/2] IB/uverbs: Adjustments for create_qp() Leon Romanovsky 2023-04-06 20:12 ` [cocci] [PATCH] remoteproc: imx_dsp_rproc: Improve exception handling in imx_dsp_rproc_mbox_alloc() Markus Elfring 2023-04-06 20:12 ` Markus Elfring 2023-04-10 17:44 ` Mathieu Poirier 2023-04-10 17:44 ` Mathieu Poirier 2023-04-07 6:22 ` [cocci] [PATCH] spi: atmel: Improve exception handling in atmel_spi_configure_dma() Markus Elfring 2023-04-07 6:22 ` Markus Elfring 2023-04-07 7:54 ` Nicolas Ferre 2023-04-07 7:54 ` Nicolas Ferre 2023-04-07 15:07 ` [cocci] " Markus Elfring 2023-04-07 15:07 ` Markus Elfring 2023-04-07 7:50 ` [cocci] [PATCH] ipvs: Fix exception handling in two functions Markus Elfring 2023-04-07 7:50 ` Markus Elfring
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