From: mame@... Date: 2018-03-08T07:34:00+00:00 Subject: [ruby-core:86028] [Ruby trunk Bug#10364] Malformed CSV Header Causes NoMethodError Issue #10364 has been updated by mame (Yusuke Endoh). Assignee changed from JEG2 (James Gray) to kou (Kouhei Sutou) @kou, could you check this ticket? ---------------------------------------- Bug #10364: Malformed CSV Header Causes NoMethodError https://bugs.ruby-lang.org/issues/10364#change-70888 * Author: jisraelson (Jon Israelson) * Status: Assigned * Priority: Normal * Assignee: kou (Kouhei Sutou) * Target version: * ruby -v: ruby 2.1.3p242 (2014-09-19 revision 47630) [x86_64-darwin13.0] * Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN ---------------------------------------- The method CSV#readline raises a "NoMethodError: undefined method 'encode' for nil:NilClass" exception when the CSV file's header row contains a trailing delimiter (a comma in my case). The following CSV data can be used to recreate this error: ~~~ col1,col2, 1,2 3,4 ~~~ The resulting stack trace: ~~~ csv.rb:993:in `block in ' csv.rb:2175:in `[]' csv.rb:2175:in `block (2 levels) in convert_fields' csv.rb:2173:in `each' csv.rb:2173:in `block in convert_fields' csv.rb:2172:in `map' csv.rb:2172:in `with_index' csv.rb:2172:in `convert_fields' csv.rb:2213:in `parse_headers' csv.rb:1887:in `block in shift' csv.rb:1779:in `loop' csv.rb:1779:in `shift' ~~~ Assuming that the header row is considered malformed (IMHO it is), it seems that it would be better to raise a CSV::MalformedCSVError exception, which can be more easily handled. -- https://bugs.ruby-lang.org/ Unsubscribe: