https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78793
Bug ID: 78793 Summary: list_read.c: 7 * possible unintended fallthrough ? Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libfortran Assignee: unassigned at gcc dot gnu.org Reporter: dcb314 at hotmail dot com Target Milestone: --- I just tried a build of trunk fortran and got this: 1. trunk/libgfortran/io/list_read.c:975:10: warning: this statement may fall through [-Wimplicit-fallthrough=] Source code is case '!': if (!dtp->u.p.namelist_mode) goto bad_integer; CASE_SEPARATORS: /* Single null. */ Suggest either document the fallthrough or add a possible missing break. 2. ../../../trunk/libgfortran/io/list_read.c:1033:10: warning: this statement may fall through [-Wimplicit-fallthrough=] ../../../trunk/libgfortran/io/list_read.c:852:10: warning: this statement may fall through [-Wimplicit-fallthrough=] ../../../trunk/libgfortran/io/list_read.c:1646:10: warning: this statement may fall through [-Wimplicit-fallthrough=] ../../../trunk/libgfortran/io/list_read.c:1705:7: warning: this statement may fall through [-Wimplicit-fallthrough=] ../../../trunk/libgfortran/io/list_read.c:1524:10: warning: this statement may fall through [-Wimplicit-fallthrough=] ../../../trunk/libgfortran/io/list_read.c:1401:7: warning: this statement may fall through [-Wimplicit-fallthrough=] Duplicates.