[Bug 40952] New: improper escaping of quotes in command line

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=40952

            Bug ID: 40952
           Summary: improper escaping of quotes in command line
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: kernel32
          Assignee: wine-bugs at winehq.org
          Reporter: programmerjake at gmail.com
      Distribution: ---

invalid quoted argument generation from argv in build_command_line

doesn't double backslashes before the closing quote.

https://github.com/wine-mirror/wine/blob/master/dlls/kernel32/process.c#L752

demo (from bash):
wine cmd /c echo ' \'
wine cmd /c echo ' \\'
wine cmd /c echo ' \\\'
wine cmd /c echo ' \"'
wine cmd /c echo ' \\"'
wine cmd /c echo ' \\\"'
outputs:
" \"
" \\"
" \\\"
" \\\""
" \\\\\""
" \\\\\\\""
should output:
" \\"
" \\\\"
" \\\\\\"
" \\\""
" \\\\\""
" \\\\\\\""

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