Spyder 4 not consistent at stopping at breakpoints in debugging.

Problem Description

Spyder 4 sometimes skip some breakpoints in debugging and stop at the next. Restarting debugging never helps. A don’t know if it is a separate issue, but at pass keyword always skips breakpoints.

What steps reproduce the problem?

Stochastic:

1. I set a breakpoint.
2. Start Debug

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

Always stopping at breakpoints

Versions

• Spyder version: 4.0.1
• Python version: 3.7.6 64 bit
• Qt version: 5.9.6
• PyQt version: 5.9.2
• Operating System name/version: Windows 10

Dependencies

atomicwrites >=1.2.0 : 1.3.0 (OK) chardet >=2.0.0 : 3.0.4 (OK) cloudpickle >=0.5.0 : 1.2.2 (OK) diff_match_patch >=20181111 : 20181111 (OK) intervaltree : None (OK) IPython >=4.0 : 7.11.1 (OK) jedi =0.14.1 : 0.14.1 (OK) nbconvert >=4.0 : 5.6.1 (OK) numpydoc >=0.6.0 : 0.9.2 (OK) pexpect >=4.4.0 : 4.7.0 (OK) pickleshare >=0.4 : 0.7.5 (OK) psutil >=0.3 : 5.6.7 (OK) pygments >=2.0 : 2.5.2 (OK) pylint >=0.25 : 2.4.4 (OK) pyls >=0.31.2;<0.32.0 : 0.31.2 (OK) zmq >=17 : 18.1.0 (OK) qdarkstyle >=2.7 : 2.7 (OK) qtawesome >=0.5.7 : 0.6.0 (OK) qtconsole >=4.6.0 : 4.6.0 (OK) qtpy >=1.5.0 : 1.9.0 (OK) rtree >=0.8.3 : 0.8.3 (OK) sphinx >=0.6.6 : 2.3.1 (OK) spyder_kernels >=1.8.1;<2.0.0: 1.8.1 (OK) watchdog : None (OK) cython >=0.21 : None (NOK) matplotlib >=2.0.0 : 3.1.1 (OK) numpy >=1.7 : 1.17.4 (OK) pandas >=0.13.1 : 0.25.3 (OK) scipy >=0.17.0 : 1.3.2 (OK) sympy >=0.7.3 : None (NOK)

[OverLordGoldDragon]

I share the problem

[impact27]

I tried this: The debugger stops on line 2 and 3. Do you have a reproducible case?