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Fix condition in Kernel#warn when using uplevel

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* It causes SEGV on `warn("foo", uplevel: 100)`.
* Found in a ruby/spec added by @andrykonchin in
  https://github.com/ruby/spec/pull/605

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63650 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
eregon 2018-06-13 21:17:48 +00:00
parent 606d6b3470
commit fe7ec526f3
1 changed files with 1 additions and 1 deletions
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2
error.c
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@ -371,7 +371,7 @@ rb_warn_m(int argc, VALUE *argv, VALUE exc)
args[0] = LONG2NUM(lev + 1);
args[1] = INT2FIX(1);
location = rb_vm_thread_backtrace_locations(2, args, GET_THREAD()->self);
if (!NIL_P(uplevel)) {
if (!NIL_P(location)) {
location = rb_ary_entry(location, 0);
}
}