Warning context lost on Build Issues pane (regression)

The following compiler output:

In file included from <file named removed>.h:4:0,
from <file named removed>.h:14,
from <file named removed>:14:
<file named removed>.h: In function 'void UnitTest::CheckEqual(UnitTest::TestResults&, const Expected&, const Actual&, const UnitTest::TestDetails&) [with Expected = unsigned int, Actual = int]':
<file named removed>.cpp:87:10: instantiated from here
<file named removed>.h:21:5: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
<file named removed>.h: In function 'void UnitTest::CheckEqual(UnitTest::TestResults&, const Expected&, const Actual&, const UnitTest::TestDetails&) [with Expected = int, Actual = unsigned int]':
<file named removed>.cpp:237:10: instantiated from here
<file named removed>.h:21:5: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

Produces the following entries on the build issues pane:

<file named removed>.h:14: from <file named removed>.h:14,
<file named removed>.cpp:14: from <file named removed>.cpp:14:
<file named removed>.h:-1: In function 'void UnitTest::CheckEqual(UnitTest::TestResults&, const Expected&, const Actual&, const UnitTest::TestDetails&) [with Expected = unsigned int, Actual = int]':
<file named removed>.h:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
<file named removed>.h:-1: In function 'void UnitTest::CheckEqual(UnitTest::TestResults&, const Expected&, const Actual&, const UnitTest::TestDetails&) [with Expected = int, Actual = unsigned int]':
<file named removed>.h:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

The "instantiated from here" bit is lost, which is the most important part.