[Bug middle-end/114667] New: `gcc -O2 t.c -fdump-tree-optimized=/dev/stdout -fdump-tree-all` produces `error: could not open dump file`

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114667

            Bug ID: 114667
           Summary: `gcc -O2 t.c -fdump-tree-optimized=/dev/stdout
                    -fdump-tree-all` produces `error: could not open dump
                    file`
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: diagnostic, rejects-valid
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

```
[apinski@xeond2 gcc]$ ~/upstream-gcc/bin/gcc -O2  -S 
-fdump-tree-optimized=/dev/stdout -fdump-tree-all t.c
t.c: In function ‘main’:
t.c:5:5: error: could not open dump file ‘/usr/local/include’: Is a directory
    5 | int main()
      |     ^~~~

```

This has been failing this way since at least 9.1.0 .