Running specific regex with Regexp::IGNORECASE flag on text starting with specific pipe character results in java.lang.ArrayIndexOutOfBoundsException #7730
Description
Environment Information
- JRuby: jruby 9.4.1.0 (3.1.0) 2023-02-07 237d5fa Java HotSpot(TM) 64-Bit Server VM 15.0.2+7-27 on 15.0.2+7-27 +jit [x86_64-linux] no command line flags
Description
Try running this simple code in JRuby
str1 = "asdas│dsfsd"
str2 = "│dsfsd"
regex1 = Regexp.new(Regexp.escape("abc"), Regexp::IGNORECASE)
puts "regex1 on str1 result: " + str1.match?(regex1).to_s
puts "regex1 on str2 result: " + str2.match?(regex1).to_s
regex2 = Regexp.new(Regexp.escape("test"), Regexp::IGNORECASE)
puts "regex2 on str1 result: " + str1.match?(regex2).to_s
puts "regex2 on str2 result: " + str2.match?(regex2).to_s
Expected Behavior
Output:
regex1 on str1 result: false
regex1 on str2 result: false
regex2 on str1 result: false
regex2 on str2 result: false
Actual Behavior
regex1 on str1 result: false
regex1 on str2 result: false
regex2 on str1 result: false
Unhandled Java exception: java.lang.ArrayIndexOutOfBoundsException: Index -2 out of bounds for length 8
java.lang.ArrayIndexOutOfBoundsException: Index -2 out of bounds for length 8
mbcCaseFold at org/jcodings/specific/BaseUTF8Encoding.java:154
mbcCaseFold at org/jcodings/specific/UTF8Encoding.java:22
lowerCaseMatch at org/joni/Search.java:42
access$000 at org/joni/Search.java:27
search at org/joni/Search.java:439
forwardSearchRange at org/joni/Matcher.java:139
searchCommon at org/joni/Matcher.java:447
searchInterruptible at org/joni/Matcher.java:318
run at org/jruby/RubyRegexp.java:285
run at org/jruby/RubyRegexp.java:266
executeTask at org/jruby/RubyThread.java:1751
executeTask at org/jruby/RubyThread.java:1729
matcherSearch at org/jruby/RubyRegexp.java:230
matchP at org/jruby/RubyRegexp.java:1247
match_p at org/jruby/RubyRegexp.java:1171
match_p at org/jruby/RubyString.java:1729
call at org/jruby/RubyString$INVOKER$i$match_p.gen:-1
cacheAndCall at org/jruby/runtime/callsite/CachingCallSite.java:495
call at org/jruby/runtime/callsite/CachingCallSite.java:244
invokeOther18:match? at regex_test.rb:10
RUBY$script at regex_test.rb:10
run at regex_test.rb:-1
invokeWithArguments at java/lang/invoke/MethodHandle.java:729
load at org/jruby/ir/Compiler.java:114
runScript at org/jruby/Ruby.java:1277
runNormally at org/jruby/Ruby.java:1194
runNormally at org/jruby/Ruby.java:1176
runNormally at org/jruby/Ruby.java:1212
runFromMain at org/jruby/Ruby.java:991
doRunFromMain at org/jruby/Main.java:398
internalRun at org/jruby/Main.java:282
run at org/jruby/Main.java:227
main at org/jruby/Main.java:199
So when a string starts with a "|" character some regex on it will bail. The example works fine on standard ruby 3.1.3p185 (2022-11-24 revision 1a6b16756e) [x86_64-linux]. The problem only appears on JRuby when the Regexp::IGNORECASE flag is set on the second regex.