<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/79972>79972</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Empty command in compilation database causes clang-scan-deps to crash
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          SonnyBonds
      </td>
    </tr>
</table>

<pre>
    clang-scan-deps 17.0.1 on Windows 11, obtained from LLVM binaries download page.

Running `clang-scan-deps --compilation-database database.json` with a database that contains an entry with an empty "command" field causes a crash. Example database.json:
```json
[
  {
    "directory": ".",
 "file": "test.cpp",
    "command": ""
 }
]
```

Any whitespace-only value for "command" causes a crash. Non-whitespace values yield a normal result or error as appropriate.

Error and call stack:
```
LLVM ERROR: SmallVector unable to grow. Requested capacity (18446744073709551615) is larger than maximum value for size type (4294967295)
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Exception Code: 0xC000001D
 #0 0x00007ff671972f36 C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x1a2f36 (C:\Program Files\LLVM\bin\clang-scan-deps.exe+0x1a2f36)
 #1 0x00007ff671972f36
 #2 0x00007ff671972f36 (C:\Program Files\LLVM\bin\clang-scan-deps.exe+0x1a2f36)
 #3 0x00007ffaa8b7e5f5 C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x1a5a53 C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x77796
 #4 0x00007ffaa8b7e5f5 C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x7750e C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x29a24
 #5 0x00007ffaa8b7e5f5 C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x25386 C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x12ed17
 #6 0x00007ffaa8b7e5f5 C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x45a2a9 C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x8314e
 #7 0x00007ffaa8b7e5f5 C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x1d6da C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x1cbc6
 #8 0x00007ffaa8b7e5f5 C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x2c81e C:\Program Files\LLVM\bin\clang-scan-deps.exe 0x2ccec
 #9 0x00007ffaa8b7e5f5 (C:\WINDOWS\System32\ucrtbase.dll+0x7e5f5)
#10 0x00007ffaa8b7f601 (C:\WINDOWS\System32\ucrtbase.dll+0x7f601)
#11 0x00007ff671975a53 (C:\Program Files\LLVM\bin\clang-scan-deps.exe+0x1a5a53)
0x00007FF671972F36, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x1A2F36 byte(s)
0x00007FFAA8B7E5F5, C:\WINDOWS\System32\ucrtbase.dll(0x00007FFAA8B00000) + 0x7E5F5 byte(s), raise() + 0x1E5 byte(s)
0x00007FFAA8B7F601, C:\WINDOWS\System32\ucrtbase.dll(0x00007FFAA8B00000) + 0x7F601 byte(s), abort() + 0x31 byte(s)
0x00007FF671975A53, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x1A5A53 byte(s)
0x00007FF671847796, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x77796 byte(s)
0x00007FF67184750E, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x7750E byte(s)
0x00007FF6717F9A24, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x29A24 byte(s)
0x00007FF6717F5386, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x25386 byte(s)
0x00007FF6718FED17, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x12ED17 byte(s)
0x00007FF671C2A2A9, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x45A2A9 byte(s)
0x00007FF67185314E, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x8314E byte(s)
0x00007FF6717ED6DA, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x1D6DA byte(s)
0x00007FF6717ECBC6, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x1CBC6 byte(s)
0x00007FF6717FC81E, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x2C81E byte(s)
0x00007FF6717FCCEC, C:\Program Files\LLVM\bin\clang-scan-deps.exe(0x00007FF6717D0000) + 0x2CCEC byte(s)
0x00007FFAA8B29363, C:\WINDOWS\System32\ucrtbase.dll(0x00007FFAA8B00000) + 0x29363 byte(s), _recalloc() + 0xA3 byte(s)
0x00007FFAA8E9257D, C:\WINDOWS\System32\KERNEL32.DLL(0x00007FFAA8E80000) + 0x1257D byte(s), BaseThreadInitThunk() + 0x1D byte(s)
0x00007FFAAB18AA58, C:\WINDOWS\SYSTEM32\ntdll.dll(0x00007FFAAB130000) + 0x5AA58 byte(s), RtlUserThreadStart() + 0x28 byte(s)
```

</pre>
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