# [PATCH] git-gui: fix error popup when doing blame -> "Show History Context"

2 messages from 2020-03-02 to 2020-03-03. Participants: Pratyush Yadav, Benjamin Poirier.
Thread: https://gitlist.dev/t/52927

## Pratyush Yadav, 2020-03-02 18:35

Subject: [PATCH] git-gui: fix error popup when doing blame -> "Show History Context"
Message-ID: <20200302183538.7195-1-me@yadavpratyush.com>
URL: https://gitlist.dev/e/20200302183538.7195-1-me%40yadavpratyush.com

```
In d9c6469 (git-gui: update status bar to track operations, 2019-12-01)
the call to 'ui_status' in 'do_gitk' was updated to create the newly
introduced "status bar operation". This allowed this status text so show
along with other operations happening in parallel, and removed a race
between all these operations.

But in that refactor, the fact that 'ui_status' checks for the existence
of 'main_status' was overlooked. This leads to an error message popping
up when the user selects "Show History Context" from the blame window
context menu on a source line. The error occurs because when running
"blame" 'main_status' is not initialized.

So, add a check for the existence of 'main_status' in 'do_gitk'. This
fix reverts to the original behaviour. In the future, we might want to
look into a better way of telling 'do_gitk' which status bar to use.

Signed-off-by: Pratyush Yadav <me@yadavpratyush.com>
---
 git-gui.sh | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/git-gui.sh b/git-gui.sh
index f41ed2e..d939844 100755
--- a/git-gui.sh
+++ b/git-gui.sh
@@ -2205,11 +2205,13 @@ proc do_gitk {revs {is_submodule false}} {
 		set env(GIT_WORK_TREE) $_gitworktree
 		cd $pwd

-		set status_operation [$::main_status \
-			start \
-			[mc "Starting %s... please wait..." "gitk"]]
+		if {[info exists main_status]} {
+			set status_operation [$::main_status \
+				start \
+				[mc "Starting %s... please wait..." "gitk"]]

-		after 3500 [list $status_operation stop]
+			after 3500 [list $status_operation stop]
+		}
 	}
 }

--
2.21.1


```

## Benjamin Poirier, 2020-03-03 00:10

Subject: Re: [PATCH] git-gui: fix error popup when doing blame -> "Show History Context"
Message-ID: <20200303001033.GA138670@f3>
URL: https://gitlist.dev/e/20200303001033.GA138670%40f3
In-Reply-To: <20200302183538.7195-1-me@yadavpratyush.com>

```
On 2020/03/03 00:05 +0530, Pratyush Yadav wrote:
> In d9c6469 (git-gui: update status bar to track operations, 2019-12-01)
> the call to 'ui_status' in 'do_gitk' was updated to create the newly
> introduced "status bar operation". This allowed this status text so show
> along with other operations happening in parallel, and removed a race
> between all these operations.
> 
> But in that refactor, the fact that 'ui_status' checks for the existence
> of 'main_status' was overlooked. This leads to an error message popping
> up when the user selects "Show History Context" from the blame window
> context menu on a source line. The error occurs because when running
> "blame" 'main_status' is not initialized.
> 
> So, add a check for the existence of 'main_status' in 'do_gitk'. This
> fix reverts to the original behaviour. In the future, we might want to
> look into a better way of telling 'do_gitk' which status bar to use.
> 
> Signed-off-by: Pratyush Yadav <me@yadavpratyush.com>

Tested-by: Benjamin Poirier <benjamin.poirier@gmail.com>

Thank you for looking into this.

```