Coverage information fails to render when branch coverage is enabled

[davidjrice]

Describe the bug
The code coverage information does not load for this one file in a project I'm working on, it renders correctly for the rest. Thankfully it's open sourced though so it's easy to reproduce.

• The file is covered by tests.
• The information for the source file is present in lcov.info
• There are no errors for this extension in the console

To Reproduce
Steps to reproduce the behaviour:

git clone https://github.com/davidjrice/autopytest.git
make deps
make test

The coverage information should be generated to .coverage/lcov.info

Expected behaviour
Coverage information should be shown for the file autopytest/autotest.py

Desktop:

• OS: macOS 13.1
• Extension Version: 2.11.0
• VSCode Version: 1.84.0

Additional context

• Python 3.12.0
• Coverage.py 7.3.2

I've attached a sample of the lcov.info dump from my project for the version @ davidjrice/autopytest#7c927c9

UPDATE: I have managed to track it down to one of the specific lines in the lcov output. Line 82. If I delete that, the coverage gutter renders correctly.

BRDA:0,3,0,-

lcov.info

TN:
SF:autopytest/__init__.py
DA:1,1,L+Y7/v9pGtZw7CR2v9eS1g
DA:3,1,Ba8BbWzTZYxN+sS2jfKSIg
LF:2
LH:2
BRF:0
BRH:0
end_of_record
TN:
SF:autopytest/autotest.py
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DA:55,0,MnzpXe1veqpfA7nIMRo0OA
LF:54
LH:43
BRDA:28,0,0,1
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BRDA:57,1,1,1
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BRDA:71,3,1,1
BRDA:70,4,0,-
BRDA:72,4,1,1
BRF:10
BRH:7
end_of_record
TN:
SF:autopytest/cli.py
DA:1,1,mUDsnWRiqW9R9nTILGKIZg
DA:3,1,4VuCxs9I2MXuN6cquQ24Hg
DA:6,1,Qc6dQ+MR6SEc7PwReo0kBQ
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DA:13,1,+bJC1GOZZjqV1KG6nW+dFw
LF:8
LH:8
BRF:0
BRH:0
end_of_record
TN:
SF:autopytest/config.py
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LF:45
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BRF:16
BRH:15
end_of_record
TN:
SF:autopytest/file.py
DA:1,1,XIMNrsE4hb4ziOGy4GNuQA
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BRF:4
BRH:4
end_of_record
TN:
SF:autopytest/runners/__init__.py
LF:0
LH:0
BRF:0
BRH:0
end_of_record
TN:
SF:autopytest/runners/pytest.py
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end_of_record
TN:
SF:autopytest/source.py
DA:1,1,p7hNY1S5rX9QtYADf+cK4g
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end_of_record
TN:
SF:autopytest/strategy.py
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BRF:24
BRH:15
end_of_record

[ryanluker]

@davidjrice Thanks for the ticket!

BRDA:0,3,0,-

Interesting finding on the branch coverage above... I wonder if the lcov library is missing some considerations for this.
The library we use is quick old as well, there might be better options nowadays.
https://github.com/davglass/lcov-parse