[Bug c/84179] New: -save-temps breaks implicit-fallthrough comment heuristic

[Patrick.Schluter at ec dot europa.eu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84179

            Bug ID: 84179
           Summary: -save-temps breaks implicit-fallthrough comment
                    heuristic
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: Patrick.Schluter at ec dot europa.eu
  Target Milestone: ---

The -Wimplicit-fallthrough heuristic to suppress the warning by analyzing
comments does not work when -save-temps is specified. Observed with any level
of the warning.

__attribute__((fallthrough)); is not affected by it.