merge revision(s) 64879: [Backport #15162]
transcode.c: add GC guard on raise * transcode.c (econv_s_search_convpath): add GC guard to fix SEGV on raise. [Bug #15162] [ruby-core:89172]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@66961 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 64879: [Backport #15162]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@66961 b2dd03c8-39d4-4d8f-98ff-823fe69b080e