[bug #64240] [troff] make numeric expression parser more sensitive to nonsense

[G. Branden Robinson]

Update of bug #64240 (group groff):

                  Status:                    None => In Progress            
             Assigned to:                    None => gbranden               

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Follow-up Comment #4:

I must know the formatter better now.  This was easy.


diff --git a/src/roff/troff/reg.cpp b/src/roff/troff/reg.cpp
index 7daf30912..57f10b5a7 100644
--- a/src/roff/troff/reg.cpp
+++ b/src/roff/troff/reg.cpp
@@ -323,8 +323,14 @@ void define_register()
       register_dictionary.define(nm, r);
     }
     r->set_value(v);
-    if (tok.is_space() && has_arg() && read_measurement(&v, 'u'))
-      r->set_increment(v);
+    if (tok.is_space()) {
+      if (has_arg() && read_measurement(&v, 'u'))
+       r->set_increment(v);
+    }
+    else if (has_arg() && !tok.is_tab())
+      warning(WARN_SYNTAX, "expected end of line or an auto-increment"
+             " argument in register definition request; got %1",
+             tok.description());
   }
   skip_line();
 }




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