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Fix for circular causes

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* eval_error.c (show_cause): get rid of infinite recursion on
  circular causes.  [Bug #15447]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66493 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2018-12-22 07:14:14 +00:00
parent 65dced4320
commit 1849288722
2 changed files with 33 additions and 6 deletions
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26
eval_error.c
View file

@ -222,23 +222,36 @@ print_backtrace(const VALUE eclass, const VALUE errat, const VALUE str, int reve
VALUE rb_get_message(VALUE exc);
static int
shown_cause_p(VALUE cause, VALUE *shown_causes)
{
VALUE shown = *shown_causes;
if (!shown) {
*shown_causes = shown = rb_obj_hide(rb_ident_hash_new());
}
if (rb_hash_has_key(shown, cause)) return TRUE;
rb_hash_aset(shown, cause, Qtrue);
return FALSE;
}
static void
show_cause(VALUE errinfo, VALUE str, VALUE highlight, VALUE reverse)
show_cause(VALUE errinfo, VALUE str, VALUE highlight, VALUE reverse, VALUE *shown_causes)
{
VALUE cause = rb_attr_get(errinfo, id_cause);
if (!NIL_P(cause) && rb_obj_is_kind_of(cause, rb_eException)) {
if (!NIL_P(cause) && rb_obj_is_kind_of(cause, rb_eException) &&
!shown_cause_p(cause, shown_causes)) {
volatile VALUE eclass = CLASS_OF(cause);
VALUE errat = rb_get_backtrace(cause);
VALUE emesg = rb_get_message(cause);
if (reverse) {
show_cause(cause, str, highlight, reverse);
show_cause(cause, str, highlight, reverse, shown_causes);
print_backtrace(eclass, errat, str, TRUE);
print_errinfo(eclass, errat, emesg, str, highlight!=0);
}
else {
print_errinfo(eclass, errat, emesg, str, highlight!=0);
print_backtrace(eclass, errat, str, FALSE);
show_cause(cause, str, highlight, reverse);
show_cause(cause, str, highlight, reverse, shown_causes);
}
}
}
@ -247,6 +260,7 @@ void
rb_error_write(VALUE errinfo, VALUE emesg, VALUE errat, VALUE str, VALUE highlight, VALUE reverse)
{
volatile VALUE eclass;
VALUE shown_causes = 0;
if (NIL_P(errinfo))
return;
@ -277,14 +291,14 @@ rb_error_write(VALUE errinfo, VALUE emesg, VALUE errat, VALUE str, VALUE highlig
len = p - (msg = buff);
}
write_warn2(str, msg, len);
show_cause(errinfo, str, highlight, reverse);
show_cause(errinfo, str, highlight, reverse, &shown_causes);
print_backtrace(eclass, errat, str, TRUE);
print_errinfo(eclass, errat, emesg, str, highlight!=0);
}
else {
print_errinfo(eclass, errat, emesg, str, highlight!=0);
print_backtrace(eclass, errat, str, FALSE);
show_cause(errinfo, str, highlight, reverse);
show_cause(errinfo, str, highlight, reverse, &shown_causes);
}
}

13
test/ruby/test_exception.rb
View file

@ -1353,6 +1353,19 @@ $stderr = $stdout; raise "\x82\xa0"') do |outs, errs, status|
assert_in_out_err([], code, [], /foo/, success: false, timeout: 2)
end
def test_circular_cause_handle
errs = [/.*error 1.*\n/, /.*error 2.*\n/, /.*error 1.*/m]
assert_in_out_err([], "#{<<~"begin;"}\n#{<<~'end;'}", [], errs, success: false, timeout: 2)
begin;
begin
raise "error 1"
rescue => e1
raise "error 2" rescue e2 = $!
raise e1, cause: e2
end
end;
end
def test_super_in_method_missing
assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}")
begin;