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      <base href="https://bugs.llvm.org/">
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Flang not failing for invalid fixed-form files"
   href="https://bugs.llvm.org/show_bug.cgi?id=51219">51219</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Flang not failing for invalid fixed-form files
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>flang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Frontend
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>andrzej.warzynski@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>David.Truby@arm.com, jperier@nvidia.com, kirankumartp@gmail.com, llvm-bugs@lists.llvm.org, sscalpone@nvidia.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Hi,

The following input file is a valid _free-form_, but incorrectly formatted
_fixed-form_ file:

```input.f90
PROGRAM HELLO
  write(*, *), "hello, world!"
END PROGRAM
```

Flang issues the following diagnostics when trying to parse this file as
fixed-form:

```
f18 -fsyntax-only -ffixed-form input.f90
./parse-preprocessed.F:1:1: Character in fixed-form label field must be a digit
  PROGRAM HELLO
  ^
./parse-preprocessed.F:2:3: Character in fixed-form label field must be a digit
    write(*, *), "hello, world!"
    ^
./parse-preprocessed.F:3:1: Character in fixed-form label field must be a digit
  END PROGRAM
  ^
```

However, it does not fail (i.e. `$?` is O). `gfortran` does return an error in
this situation. I believe that so should Flang. Or am I missing something here?


Tested with trunk: 81600160b3f9

Thanks,
Andrzej</pre>
        </div>
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