[Bug c/88424] New: Inserts newlines when preserving comments for a file using Windows newlines

[reiter.christoph at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88424

            Bug ID: 88424
           Summary: Inserts newlines when preserving comments for a file
                    using Windows newlines
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reiter.christoph at gmail dot com
  Target Milestone: ---

gcc --version
gcc (Debian 8.2.0-11) 8.2.0

When preprocessing a file which uses Windows newlines without discarding
comments (The -C option) then gcc inserts an extra newline after each line in
comments:

* Write the following to test.c and make sure it uses Windows newlines

/**
 * Foo-
 * bar-
 * quux
 */
int main() {
    return 0;
}

* Execute "gcc -C -E test.c"

3) Expected (this is what clang produces):

[...]
/**
 * Foo-
 * bar-
 * quux
 */
int main() {
    return 0;
}

* Actual:

/**

 * Foo-

 * bar-

 * quux

 */
# 6 "test.c"
int main() {
    return 0;
}