# GUISupportQtQuickCxx Failed Error regular expression found in output. Regex=\[Failed Image Test\]
**URL:** https://discourse.vtk.org/t/guisupportqtquickcxx-failed-error-regular-expression-found-in-output-regex-failed-image-test/6303
**Category:** Support
**Created:** [August 6, 2021, 1:37am UTC](https://discourse.vtk.org/t/guisupportqtquickcxx-failed-error-regular-expression-found-in-output-regex-failed-image-test/6303 "2021-08-06T01:37:36Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@eton](https://discourse.vtk.org/u/eton)
#### Post date: [August 6, 2021, 1:37am UTC](https://discourse.vtk.org/t/guisupportqtquickcxx-failed-error-regular-expression-found-in-output-regex-failed-image-test/6303/1 "2021-08-06T01:37:36Z")
Hi, everyone, I build vtk master on ubuntu2004 with Qt5.15.2(install with Qt’s online .run file). when i run ctest I get error message like below. anyone would like get me some advice to dig out why it wrong?
very thanks.
```auto
Start 497: VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderItem
497/2429 Test #497: VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderItem ............................................ Passed 1.17 sec
Start 498: VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderItemWidget
498/2429 Test #498: VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderItemWidget ......................................***Failed Error regular expression found in output. Regex=[Failed Image Test] 1.99 sec
Start 499: VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderWindow
499/2429 Test #499: VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderWindow .......................................... Passed 3.17 sec
```
---
### Author:  [@ben.boeckel](https://discourse.vtk.org/u/ben.boeckel)
#### Post date: [August 6, 2021, 1:51am UTC](https://discourse.vtk.org/t/guisupportqtquickcxx-failed-error-regular-expression-found-in-output-regex-failed-image-test/6303/2 "2021-08-06T01:51:03Z")
Can you run with `ctest --output-on-failure --rerun-failed`? It should show the image difference path that you can inspect to see what might be wrong.
---
### Author:  [@eton](https://discourse.vtk.org/u/eton)
#### Post date: [August 6, 2021, 2:04am UTC](https://discourse.vtk.org/t/guisupportqtquickcxx-failed-error-regular-expression-found-in-output-regex-failed-image-test/6303/3 "2021-08-06T02:04:32Z")
tks @ben.boeckel , Here is the log but the test "TestQQuickVTKRenderItemWidget " passed this time, so thanks let me know the way to get detailed error msg. 😄
```auto
3398 Start 498: VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderItemWidget
3399 122/704 Test #498: VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderItemWidget ...................................... Passed 1.64 sec
3400 Start 538: VTK::InteractionWidgetsCxx-BoxWidget
3401 123/704 Test #538: VTK::InteractionWidgetsCxx-BoxWidget .........................................................***Exception: Numerical 0.31 sec
3402 ^[[0m^[[1m^[[91m
3403 Loguru caught a signal: SIGFPE
3404 ^[[0m^[[0m^[[31mStack trace:
3405 25 0x5626e071906e /home/eton/opt/vtks/vtk-src/build/bin/vtkInteractionWidgetsCxxTests(+0x2506e) [0x5626e071906e]
3406 24 0x7f20095860b3 __libc_start_main + 243
3407 23 0x5626e0719a0e /home/eton/opt/vtks/vtk-src/build/bin/vtkInteractionWidgetsCxxTests(+0x25a0e) [0x5626e0719a0e]
3408 22 0x5626e071a327 /home/eton/opt/vtks/vtk-src/build/bin/vtkInteractionWidgetsCxxTests(+0x26327) [0x5626e071a327]
3409 21 0x7f200814b998 vtkRenderWindowInteractor::Initialize() + 104
3410 20 0x7f20086d2d07 vtkXOpenGLRenderWindow::Render() + 55
3411 19 0x7f200863610b vtkOpenGLRenderWindow::Render() + 187
3412 18 0x7f2008147b65 vtkRenderWindow::Render() + 677
3413 17 0x7f20086d296e vtkXOpenGLRenderWindow::Start() + 94
3414 16 0x7f20086cdbc7 vtkXOpenGLRenderWindow::WindowInitialize() + 23
3415 15 0x7f20086d0cd5 vtkXOpenGLRenderWindow::CreateAWindow() + 965
3416 14 0x7f20052344fc /lib/x86_64-linux-gnu/libGLX.so.0(+0x54fc) [0x7f20052344fc]
3417 13 0x7f2004cded62 /lib/x86_64-linux-gnu/libGLX_indirect.so.0(+0x34d62) [0x7f2004cded62]
3418 12 0x7f2004ce126f /lib/x86_64-linux-gnu/libGLX_indirect.so.0(+0x3726f) [0x7f2004ce126f]
3419 11 0x7f20037bb505 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0x70a505) [0x7f20037bb505]
3420 10 0x7f20031f1b92 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0x140b92) [0x7f20031f1b92]
3421 9 0x7f200324b980 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0x19a980) [0x7f200324b980]
3422 8 0x7f20038b05e6 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0x7ff5e6) [0x7f20038b05e6]
3423 7 0x7f2003e0a45e /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0xd5945e) [0x7f2003e0a45e]
3398,16 59% 5560 8 0x7efc103075e6 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0x7ff5e6) [0x7efc103075e6]
5561 7 0x7efc1086145e /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0xd5945e) [0x7efc1086145e]
5562 6 0x7efc10860366 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0xd58366) [0x7efc10860366]
5563 5 0x7efc1025cb74 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0x754b74) [0x7efc1025cb74]
5564 4 0x7efc1025c929 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0x754929) [0x7efc1025c929]
5565 3 0x7efc102594c8 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0x7514c8) [0x7efc102594c8]
5566 2 0x7efc10325411 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0x81d411) [0x7efc10325411]
5567 1 0x7efc10884618 /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so(+0xd7c618) [0x7efc10884618]
5568 0 0x7efc15ffc210 /lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7efc15ffc210]^[[0m
5569 ^[[0m^[[31m( 0.069s) [main thread] :0 FATL| Signal: SIGFPE^[[0m
5570
```
---
### Author:  [@ben.boeckel](https://discourse.vtk.org/u/ben.boeckel)
#### Post date: [August 6, 2021, 1:15pm UTC](https://discourse.vtk.org/t/guisupportqtquickcxx-failed-error-regular-expression-found-in-output-regex-failed-image-test/6303/4 "2021-08-06T13:15:44Z")
Ah, floating point exceptions. I forget the fix for that, but it was in Mesa. If you build in non-`Debug` mode, the FPE checks won’t be enabled on VTK’s side at least…
---
### Author:  [@eton](https://discourse.vtk.org/u/eton)
#### Post date: [August 6, 2021, 1:19pm UTC](https://discourse.vtk.org/t/guisupportqtquickcxx-failed-error-regular-expression-found-in-output-regex-failed-image-test/6303/5 "2021-08-06T13:19:33Z")
great answer, tks. @ben.boeckel