kcov misses all lines except the last one in a multiline command substitution

[susam]

Here is an example of a shell script that may be used to reproduce the issue.

echo "foo bar" |
sed "s/ /-/g"

a=$(echo "baz qux" |
    sed 's/ /-/g')

echo "$a"

Save the above code in a file, say foo.sh and execute the following command.

kcov coverage foo.sh

Since every line of the script was executed, the coverage result should show 100% coverage. But the coverage result shows that a=$(echo "baz qux" | was not executed.

Here is the output of the kcov command and the coverage result.

$ kcov coverage foo.sh
foo-bar
baz-qux
$ cat coverage/foo.sh/foo.sh.*.json
var data = {lines:[
{"lineNum":"    1","line":"echo \"foo bar\" |","class":"lineCov","hits":"2","order":"1","possible_hits":"0",},
{"lineNum":"    2","line":"sed \"s/ /-/g\"","class":"lineCov","hits":"2","order":"2","possible_hits":"0",},
{"lineNum":"    3","line":""},
{"lineNum":"    4","line":"a=$(echo \"baz qux\" |","class":"lineNoCov","hits":"0","possible_hits":"0",},
{"lineNum":"    5","line":"    sed \'s/ /-/g\')","class":"lineCov","hits":"4","order":"3","possible_hits":"0",},
{"lineNum":"    6","line":""},
{"lineNum":"    7","line":"echo \"$a\"","class":"lineCov","hits":"2","order":"4","possible_hits":"0",},
]};
var percent_low = 25;var percent_high = 75;
var header = { "command" : "foo.sh", "date" : "2016-12-01 20:58:49", "instrumented" : 5, "covered" : 4,};
var merged_data = [];