Spyder 4.1.0, 4.1.1 hangs/freezes when simply pasting a long url in editor

[smisra4]

Issue Report Checklist

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

Problem Description

A line like the following in spyder editor causes it to hang, freeze. This started in 4.1.0 and 4.1.1. This was fine till 3.3.6.

spyder4_fail.txt

What steps reproduce the problem?

1. Just copy and paste the line in above file in spyder 4.1.0 or 4.1.1 editor
2. The issue still happens if the line is commented out.
3. If this is put into a file, the spyder hangs while opening the file. Just try opening the file in spyder.

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

NA, crash, hang

Paste Traceback/Error Below (if applicable)

NA, Hang, Freeze

Versions

• Spyder version: 4.1.1
• Python version: 3.7.6
• Qt version: 5.9.7
• PyQt version: 5.9.2
• Operating System name/version: Windows 10

Dependencies

Mandatory:

atomicwrites >=1.2.0 : 1.3.0 (OK) chardet >=2.0.0 : 3.0.4 (OK) cloudpickle >=0.5.0 : 1.3.0 (OK) diff_match_patch >=20181111 : 20181111 (OK) intervaltree : None (OK) IPython >=4.0 : 7.13.0 (OK) jedi =0.15.2 : 0.15.2 (OK) nbconvert >=4.0 : 5.6.1 (OK) numpydoc >=0.6.0 : 0.9.2 (OK) paramiko >=2.4.0 : 2.7.1 (OK) parso =0.5.2 : 0.5.2 (OK) pexpect >=4.4.0 : 4.8.0 (OK) pickleshare >=0.4 : 0.7.5 (OK) psutil >=5.3 : 5.7.0 (OK) pygments >=2.0 : 2.6.1 (OK) pylint >=0.25 : 2.4.4 (OK) pyls >=0.31.9;<0.32.0 : 0.31.9 (OK) qdarkstyle >=2.8 : 2.8 (OK) qtawesome >=0.5.7 : 0.7.0 (OK) qtconsole >=4.6.0 : 4.7.1 (OK) qtpy >=1.5.0 : 1.9.0 (OK) rtree >=0.8.3 : 0.9.3 (OK) sphinx >=0.6.6 : 2.4.0 (OK) spyder_kernels >=1.9.0;<1.10.0 : 1.9.0 (OK) watchdog : None (OK) zmq >=17 : 18.1.1 (OK)

Optional:

cython >=0.21 : None (OK) matplotlib >=2.0.0 : 3.1.3 (OK) numpy >=1.7 : 1.18.1 (OK) pandas >=0.13.1 : 1.0.2 (OK) scipy >=0.17.0 : 1.4.1 (OK) sympy >=0.7.3 : None (OK)

[ccordoba12]

The bug is valid, but I don't think we're going to solve it soon. If you want to edit an string with almost 400k characters, I think you need to use another editor/IDE.

[smisra4]

Okay. It was a file URL in one of my programs. Interestingly, Spyder till version 3.3.6 handled it without a problem.

[ccordoba12]

Okay. It was a file URL in one of my programs.

I don't think it is. It looks like a base64 encoded image.

[smisra4]

No, it is actually a dataURL generated through this https://dataurl.sveinbjorn.org/#dataurlmaker It generates base64 encoded URLs.