diff options
Diffstat (limited to 'vm_eval.c')
-rw-r--r-- | vm_eval.c | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -1536,7 +1536,7 @@ rb_catch_obj(VALUE tag, VALUE (*func)(), VALUE data) /* * call-seq: - * caller(start=1) -> array + * caller(start=1) -> Array or nil * * Returns the current execution stack---an array containing strings in * the form ``<em>file:line</em>'' or ``<em>file:line: in @@ -1544,6 +1544,9 @@ rb_catch_obj(VALUE tag, VALUE (*func)(), VALUE data) * determines the number of initial stack entries to omit from the * result. * + * Returns +nil+ if _start_ is greater than or equal to the size of + * current execution stack. + * * def a(skip) * caller(skip) * end @@ -1557,6 +1560,7 @@ rb_catch_obj(VALUE tag, VALUE (*func)(), VALUE data) * c(1) #=> ["prog:5:in `b'", "prog:8:in `c'", "prog:11"] * c(2) #=> ["prog:8:in `c'", "prog:12"] * c(3) #=> ["prog:13"] + * c(4) #=> nil */ static VALUE |