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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - "llvm-cov show" displays suboptimal output when file is lacking coverage"
href="https://llvm.org/bugs/show_bug.cgi?id=30659">30659</a>
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<th>Summary</th>
<td>"llvm-cov show" displays suboptimal output when file is lacking coverage
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</td>
</tr>
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<th>Version</th>
<td>3.9
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>dane@mapbox.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>If you run `llvm-cov show src/*cpp` and a file inside of `src/*cpp` lacks
coverage then coverage is successfully output for the files with coverage but a
confusing warning and error is displayed for the file that is not. I added a
blank file to replicate called ` src/foo.cpp` and the output was:
error: B?
: No such file or directory
warning: The file 'B?
' isn't covered.
Note: the exact command was `llvm-cov show
/Users/dane/projects/node-cpp-skel/lib/binding/hello_world.node
-instr-profile=code.profdata src/*.cpp -filename-equivalence -use-color` which
the shell expands to `llvm-cov show
/Users/dane/projects/node-cpp-skel/lib/binding/hello_world.node
-instr-profile=code.profdata src/foo.cpp src/hello_world.cpp
-filename-equivalence -use-color`.
I would expect the output to be something like: `warning: the file src/foo.cpp
isn't covered, skipping this file`
Also, and it appears that the order of files passed matters. If the
`src/foo.cpp` that lacks coverage is passed first then, like I describe above,
the coverage is output successfully for other files (src/hello_world.cpp in
this case) and the odd warning is harmless. But if `src/foo.cpp` is passed last
then no coverage is output for the file that needs it displayed and an error is
output like:
error: B@?? B@?: No such file or directory
warning: The file 'B@?? B@?' isn't covered.
warning: The file 'src/foo.cpp' isn't covered.</pre>
</div>
</p>
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