From 48af6fd544e0b3cec83af9a629059ff8d304720c Mon Sep 17 00:00:00 2001 From: naruse Date: Sat, 27 Oct 2018 21:45:30 +0000 Subject: Print exception's cause like Java Print `cause` of the exception if the exception is not caught and printed its backtraces and error message [Feature #8257] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65393 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- eval_error.c | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) (limited to 'eval_error.c') diff --git a/eval_error.c b/eval_error.c index 8f98fcc319..6ce2a8f9a2 100644 --- a/eval_error.c +++ b/eval_error.c @@ -220,6 +220,29 @@ print_backtrace(const VALUE eclass, const VALUE errat, const VALUE str, int reve } } +VALUE rb_get_message(VALUE exc); + +static void +show_cause(VALUE errinfo, VALUE str, VALUE highlight, VALUE reverse) +{ + VALUE cause = rb_attr_get(errinfo, id_cause); + if (!NIL_P(cause)) { + 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); + print_errinfo(eclass, errat, emesg, str, highlight!=0); + print_backtrace(eclass, errat, str, FALSE); + } + else { + print_backtrace(eclass, errat, str, TRUE); + print_errinfo(eclass, errat, emesg, str, highlight!=0); + show_cause(cause, str, highlight, reverse); + } + } +} + void rb_error_write(VALUE errinfo, VALUE emesg, VALUE errat, VALUE str, VALUE highlight, VALUE reverse) { @@ -254,17 +277,17 @@ 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); 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); } } -VALUE rb_get_message(VALUE exc); - void rb_ec_error_print(rb_execution_context_t * volatile ec, volatile VALUE errinfo) { -- cgit v1.2.3