FreeCADView Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0004119 | Expressions | Bug | public | 2019-09-09 04:41 | 2021-02-06 06:30 |
| Reporter | cbruner | Assigned To | realthunder | ||
| Priority | high | Severity | crash | Reproducibility | always |
| Status | assigned | Resolution | open | ||
| Platform | linux-mint | OS | linux | OS Version | 19.2 |
| Product Version | 0.18 | ||||
| Target Version | 0.20 | ||||
| Summary | 0004119: spaces in names cause fail to parse expressions. | ||||
| Description | Forum discussion. https://forum.freecadweb.org/viewtopic.php?f=3&t=39153 OS: Linux Mint 19.2 Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.18.16131 (Git) AppImage Build type: Release Branch: (HEAD detached at 0.18.3) Hash: 3129ae4296e40ed20e7b3d460b86e6969acbe1c3 Python version: 3.6.7 Qt version: 5.6.2 Coin version: 4.0.0a OCC version: 7.3.0 Locale: English/Canada (en_CA) | ||||
| Steps To Reproduce | Follow the Freecad tutorial video. https://www.youtube.com/watch?v=C1JG6l1uIJw&t=773s at 18:06 he has created a master sketch with a rectangle and a line, which is called "HeightOfBlock". I typed "Height of Block", which led to subsequent errors of "fail to parse expressions" Later in the tutorial Figuring out the root cause was difficult and wasted many hours I had dedicated to learning freecad. It can be resolved by several ways. 1. Give an error when spaces are used in names. (Either use them or don't, but don't accept them and then complain about it!) 2. Substitute "_" for " " whenever a name is added. This resolves the problem pretty simply and allows for names that look like they have spaces without actually having spaces. 3. Change the parser to handle names with spaces. (I think this is the worst solution). | ||||
| Additional Information | The Failure to parse expressions error occurred when trying to use the part, but it seemed to be referring to a cyclic redundancy problem, not the actual root cause. | ||||
| Tags | expressions | ||||
| FreeCAD Information | |||||
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I forgot to mention a crash which occurred due to this bug. I believe this to be a separate issue, but possibly related so I'm mentioning it here. From the forum notes: I started deleting the CC and noticed that the master was grey now, with a new sketch001 under it. Deleted that and got a segfault. Show.TempoVis.isIn3DView error: Object has been removed from documentViewProviderSketch::setEdit: visibility automation failed with an error: Traceback (most recent call last): File "<string>", line 7, in <module> File "/tmp/.mount_freecatHpNXG/usr/Mod/Show/TempoVis.py", line 118, in hide self.modifyVPProperty(doc_obj_or_list, 'Visibility', False) File "/tmp/.mount_freecatHpNXG/usr/Mod/Show/TempoVis.py", line 99, in modifyVPProperty if not hasattr(doc_obj.ViewObject, prop_name): <class 'RuntimeError'>: Object has been removed from document App::Document::recompute(): cyclic dependency detected Exception (Sat Sep 7 13:15:07 2019): Invalid constraint App::Document::recompute(): cyclic dependency detected App::Document::recompute(): cyclic dependency detected Exception (Sat Sep 7 13:15:28 2019): Invalid constraint App::Document::recompute(): cyclic dependency detected Program received signal SIGSEGV, Segmentation fault. /tmp/.mount_freecatHpNXG/AppRun: line 12: 12528 Segmentation fault (core dumped) ${HERE}/usr/bin/FreeCAD "$@" |
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Can you describe a quick example that reproduces the error? I know you referenced the video you were following at the time, but it would help to have a simple example that can be reproduced in a minimum number of steps. |
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Create a sketch call it "Master" with a line in it. Give the line a dimension and the line "Height of block". https://youtu.be/C1JG6l1uIJw?t=1079 Create a new sketch (from the same body that the Master was created from). Put a properly constrained square on this new sketch. Then Pad it. The length of the pad is ="Master.Height of block" I think this will show the error. You can name things with spaces in them, but can't use those names to reference things. Hope this is clear enough. |
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Moved to 'Expressions' category |
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Will be solved by this PR. See here for details. |
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This ticket has been migrated to GitHub as issue 5983. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2019-09-09 04:41 | cbruner | New Issue | |
| 2019-09-09 10:57 | openBrain | Tag Attached: expressions | |
| 2019-09-09 13:40 | cbruner | Note Added: 0013561 | |
| 2019-12-30 17:28 | graffy | Note Added: 0013962 | |
| 2019-12-31 05:40 | cbruner | Note Added: 0013963 | |
| 2019-12-31 05:49 | cbruner | Note Edited: 0013963 | |
| 2020-01-02 14:18 | Kunda1 | Project | FreeCAD => Expressions |
| 2020-01-02 14:19 | Kunda1 | Note Added: 0013967 | |
| 2020-01-02 14:20 | Kunda1 | Target Version | => 0.19 |
| 2020-01-02 14:20 | Kunda1 | Status | new => confirmed |
| 2020-01-02 14:20 | Kunda1 | Priority | normal => high |
| 2020-01-02 14:20 | Kunda1 | Severity | major => crash |
| 2020-02-27 04:05 | realthunder | Note Added: 0014184 | |
| 2020-02-27 18:08 | Kunda1 | Assigned To | => realthunder |
| 2020-02-27 18:08 | Kunda1 | Status | confirmed => assigned |
| 2021-02-06 06:30 | abdullah | Target Version | => 0.20 |
