[#99868] [Ruby master Bug#17144] Tempfile.open { ... } does not unlink the file — eregontp@...
Issue #17144 has been reported by Eregon (Benoit Daloze).
15 messages
2020/09/03
[ruby-core:99927] [Ruby master Bug#17152] Missing TracePoint return event for String#unpack
From:
cfis@...
Date:
2020-09-04 19:25:07 UTC
List:
ruby-core #99927
Issue #17152 has been reported by cfis (Charlie Savage).
----------------------------------------
Bug #17152: Missing TracePoint return event for String#unpack
https://bugs.ruby-lang.org/issues/17152
* Author: cfis (Charlie Savage)
* Status: Open
* Priority: Normal
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
A user reported an incorrect call graph for profiled code from ruby prof. See https://github.com/ruby-prof/ruby-prof/issues/279.
After investigation, this is a bug in Ruby 2.7.1 (it works in Ruby 2.6.*, not sure about Ruby 2.7.0).
Take this simple code:
`str = "AABBCC"
profile = RubyProf::Profile.profile do
5.times do
str.unpack("c*")
end
end
File.open('uuid.html', 'w') do |f|
RubyProf::CallStackPrinter.new(profile).print(f)
end
File.open('graph.html', 'w') do |f|
RubyProf::GraphHtmlPrinter.new(profile).print(f)
end`
If you look at fired trace point events (you can do that by setting the environmental variable RUBY_PROF_TRACE=trace.txt before running ruby-prof), you get:
`
60031140:209717.574422 line # D:/src/ruby-prof/test/stack_test.rb:10
60031140:209717.574646 c-call Integer#times D:/src/ruby-prof/test/stack_test.rb:10
60031140:209717.574683 line # D:/src/ruby-prof/test/stack_test.rb:11
60031140:209717.574704 call String#unpack <internal:pack>:256
60031140:209717.574721 line String#unpack <internal:pack>:257
60031140:209717.574937 line # D:/src/ruby-prof/test/stack_test.rb:11
60031140:209717.574959 call String#unpack <internal:pack>:256
60031140:209717.574976 line String#unpack <internal:pack>:257
60031140:209717.574991 line # D:/src/ruby-prof/test/stack_test.rb:11
60031140:209717.575004 call String#unpack <internal:pack>:256
60031140:209717.575020 line String#unpack <internal:pack>:257
60031140:209717.575034 line # D:/src/ruby-prof/test/stack_test.rb:11
60031140:209717.575047 call String#unpack <internal:pack>:256
60031140:209717.575060 line String#unpack <internal:pack>:257
60031140:209717.575074 line # D:/src/ruby-prof/test/stack_test.rb:11
60031140:209717.575086 call String#unpack <internal:pack>:256
60031140:209717.575106 line String#unpack <internal:pack>:257
60031140:209717.575121 c-return Integer#times D:/src/ruby-prof/test/stack_test.rb:10
`
Notice the return tracepoints are not fired. If you use some other method, like string.downcase, they are correctly fired. Perhaps something unique about unpack?
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