From: mame@... Date: 2021-03-31T13:10:33+00:00 Subject: [ruby-core:103128] [Ruby master Bug#17765] Segmentation fault when calling String#gsub Issue #17765 has been updated by mame (Yusuke Endoh). It is difficult to identify the problem because the log lacks C level backtrace information maybe due to musl. Are you using Alpine Linux? If so could you try Debian with glibc? ---------------------------------------- Bug #17765: Segmentation fault when calling String#gsub https://bugs.ruby-lang.org/issues/17765#change-91202 * Author: lenwood (Paul Martensen) * Status: Open * Priority: Normal * ruby -v: ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-linux-musl] * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN ---------------------------------------- We recently had a ruby segfault occuring while invoking `String#gsub`. The line in the code looks like this: ``` ruby def sanitize_for_prometheus(string_or_symbol) reg = /[^a-zA-Z_0-9]/ string_or_symbol.to_s.downcase.gsub(reg, '_') end ``` And we've tried to replicate the segfault (on a different machine) with this script: ```rb def sanitize_for_prometheus(string_or_symbol) reg = /[^a-zA-Z_0-9]/ string_or_symbol.to_s.downcase.gsub(reg, '_') end def rand_string_or_symbol @o ||= [('a'..'z').to_a, ('A'..'Z').to_a, (0..9).to_a, '-', '.'].flatten str = @o.sample(50).join rand > 0.5 ? str.to_sym : str end loop { sanitize_for_prometheus rand_string_or_symbol } ``` But without success so far. I have attached a shortened version of the log file for reference. ---Files-------------------------------- segfault.log (60.8 KB) segfault_gsub.rb (343 Bytes) -- https://bugs.ruby-lang.org/ Unsubscribe: