Spyder steals my letters!

Issue Report Checklist

• Searched the issues page for similar reports
• Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
• Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
• Could not reproduce inside jupyter qtconsole (if console-related)
• Tried basic troubleshooting (if a bug/error)
  • Restarted Spyder
  • Reset preferences with spyder --reset
  • Reinstalled the latest version of Anaconda
  • Tried the other applicable steps from the Troubleshooting Guide
• Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

Spyder steals letters and give them back as a block at a latter point.

What steps reproduce the problem?

1. Create a new file (I created test.py on the Desktop)
2. Type the following as fast as you can:

import numpy as np
np.asarray()
np.asarray()
np.asarray()
np.asarray()
np.asarray()

1. Save the file under a new name (I save it as test2.py on the Desktop)

What is the expected output? What do you see instead?

I expect to see what I typed. instead I see:

import numpy as np
np.asaray()
np.asarray()
np.asaray()
np.asaray()
np.asaray()
rrrr

In this case only the r are missing, but I had parenthesis and other letters missing in the same way. The rrrr at the end appeared when I saved the file under a new name.

Paste Traceback/Error Below (if applicable)

NA

Versions

• Spyder version: Spyder 4.0.0.dev0 (Commit: 2c90e2aea)
• Python version: Python 3.7.3 64-bit
• Qt version: Qt 5.9.1
• PyQt version: PyQt5 5.9
• Operating System name/version: Darwin 18.5.0

Dependencies

pygments >=2.0 : 2.3.1 (OK) qdarkstyle >=2.6.4: 2.6.5 (OK) sphinx >=0.6.6 : 1.8.5 (OK) psutil >=0.3 : 5.6.1 (OK) pyls >=0.19.0 : 0.25.0 (OK) nbconvert >=4.0 : 5.4.1 (OK) pandas >=0.13.1 : 0.24.2 (OK) numpy >=1.7 : 1.16.2 (OK) sympy >=0.7.3 : 1.3 (OK) cython >=0.21 : 0.29.6 (OK) qtconsole >=4.2.0 : 4.5.0.dev0 (OK) IPython >=4.0 : 7.3.0 (OK) matplotlib >=2.0.0: 3.0.3 (OK) pylint >=0.25 : 2.3.1 (OK)

[ccordoba12]

Nop, don’t worry. You’re right that PR #9260 is going to fix this.

[impact27]

I solved it by removing

         elif text in self.auto_completion_characters: 
             self.insert_text(text) 
             if not self.in_comment_or_string(): 
                 last_obj = getobj(self.get_text('sol', 'cursor')) 
                 if last_obj and not last_obj.isdigit(): 
                     self.do_completion(automatic=True) 

It is a bit annoying anyway to have the widget appearing randomly. If I want code completion I can press <tab>. Is there a way to do that from the options? There is probably an underlying bug but I suspect it is with Qt. Something like: If you receive an event while processing another event, it is not queued properly?