From 3de12cc548c7a37bb68ea10937709dc6385a3b2b Mon Sep 17 00:00:00 2001 From: Thomas Koenig Date: Sun, 14 Jun 2020 17:37:49 +0200 Subject: [PATCH] Avoid crash when global symbol table is empty with -fdump-fortran-global. This just avoids a crash with -fdump-fortran-global when the global symbol table is empty. This is strictly a developer's option, no user impact. gcc/fortran/ChangeLog: 2020-06-14 Thomas Koenig PR fortran/42122 * dump-parse-tree.c (gfc_dump_global_symbols): If the symroot is empty, just output "empty". --- gcc/fortran/dump-parse-tree.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/gcc/fortran/dump-parse-tree.c b/gcc/fortran/dump-parse-tree.c index f323306..f446488 100644 --- a/gcc/fortran/dump-parse-tree.c +++ b/gcc/fortran/dump-parse-tree.c @@ -3595,5 +3595,8 @@ show_global_symbol (gfc_gsymbol *gsym, void *f_data) void gfc_dump_global_symbols (FILE *f) { - gfc_traverse_gsymbol (gfc_gsym_root, show_global_symbol, (void *) f); + if (gfc_gsym_root == NULL) + fprintf (f, "empty\n"); + else + gfc_traverse_gsymbol (gfc_gsym_root, show_global_symbol, (void *) f); } -- 2.7.4