February 2024 - ruby-core - ml.ruby-lang.org

[ruby-core:116565] [Ruby master Feature#20235] Deprecate CHAR syntax
by Dan0042 (Daniel DeLorme) 06 Feb '24

06 Feb '24

Issue #20235 has been reported by Dan0042 (Daniel DeLorme). ---------------------------------------- Feature #20235: Deprecate CHAR syntax https://bugs.ruby-lang.org/issues/20235 * Author: Dan0042 (Daniel DeLorme) * Status: Open * Priority: Normal ---------------------------------------- I propose deprecating the `?c` syntax. It served a purpose in ruby <= 1.8, but no longer. The reason I'm proposing this is because today I ran into this error: ```ruby p $stdin.closed?=>true # comparison of String with true failed (ArgumentError) ``` I was completed mystified, and had to resort to Ripper to figure out what's going on ``` p *Ripper.lex("p $stdin.closed?=>true") [[1, 0], :on_ident, "p", CMDARG] [[1, 1], :on_sp, " ", CMDARG] [[1, 2], :on_gvar, "$stdin", END] [[1, 8], :on_period, ".", DOT] [[1, 9], :on_ident, "closed", ARG] [[1, 15], :on_CHAR, "?=", END] #OOOOHH!!!!! [[1, 17], :on_op, ">", BEG] [[1, 18], :on_kw, "true", END] ``` We don't have to commit to a removal schedule right now, but I think it would at least be good to print a deprecation message if $VERBOSE. -- https://bugs.ruby-lang.org/

5 7

[ruby-core:112947] [Ruby master Bug#19542] Operations on zero-sized IO::Buffer are raising
by hanazuki (Kasumi Hanazuki) 05 Feb '24

05 Feb '24

Issue #19542 has been reported by hanazuki (Kasumi Hanazuki). ---------------------------------------- Bug #19542: Operations on zero-sized IO::Buffer are raising https://bugs.ruby-lang.org/issues/19542 * Author: hanazuki (Kasumi Hanazuki) * Status: Open * Priority: Normal * ruby -v: ruby 3.2.1 (2023-02-08 revision 31819e82c8) [x86_64-linux] * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- I found that IO::Buffer of zero length is not cloneable. ``` % ruby -v ruby 3.2.1 (2023-02-08 revision 31819e82c8) [x86_64-linux] % ruby -e 'p IO::Buffer.for("").dup' -e:1:in `initialize_copy': The buffer is not allocated! (IO::Buffer::AllocationError) from -e:1:in `initialize_dup' from -e:1:in `dup' from -e:1:in `<main>' % ruby -e 'p IO::Buffer.new(0).dup' -e:1: warning: IO::Buffer is experimental and both the Ruby and C interface may change in the future! -e:1:in `initialize_copy': The buffer is not allocated! (IO::Buffer::AllocationError) from -e:1:in `initialize_dup' from -e:1:in `dup' from -e:1:in `<main>' ``` It seems `IO::Buffer.new(0)` allocates no memory for buffer on object creation and thus prohibits reading from or writing to it. So `#dup` method copying zero bytes into the new IO::Buffer raises the exception. Empty buffers, however, often appear in corner cases of usual operations (encrypting an empty string, encoding an empty list of items into binary, etc.) and it would be easy if such cases could be handled consistently. Other operations on NULL IO::Buffers are also useful but currently raising. ``` IO::Buffer.new(0) <=> IO::Buffer.new(1) IO::Buffer.new(0).each(:U8).to_a IO::Buffer.new(0).get_values([], 0) IO::Buffer.new(0).set_values([], 0, []) ``` I'm not sure this is a bug or by design, but at least I don't want cloning and comparison to raise. -- https://bugs.ruby-lang.org/

3 5

[ruby-core:116575] [Ruby master Bug#20236] OpenSSL::Cipher#update - probable buffer overflow: 16 for 15
by nakhli (Chaker Nakhli) 05 Feb '24

05 Feb '24

Issue #20236 has been reported by nakhli (Chaker Nakhli). ---------------------------------------- Bug #20236: OpenSSL::Cipher#update - probable buffer overflow: 16 for 15 https://bugs.ruby-lang.org/issues/20236 * Author: nakhli (Chaker Nakhli) * Status: Open * Priority: Normal * ruby -v: ruby 3.2.2 (2023-03-30 revision e51014f9c0) [arm64-darwin23] * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- input program crash.rb ``` ruby require 'openssl' cipher = OpenSSL::Cipher.new('aes128-wrap-pad').encrypt cipher.random_key cipher.update('42') ``` crashes systematically with the attached diagnostic report and the following output ``` $ ruby crash.rb crash.rb:5: [BUG] probable buffer overflow: 16 for 15 ruby 3.2.2 (2023-03-30 revision e51014f9c0) [arm64-darwin23] -- Crash Report log information -------------------------------------------- See Crash Report log file in one of the following locations: * ~/Library/Logs/DiagnosticReports * /Library/Logs/DiagnosticReports for more details. Don't forget to include the above Crash Report log file in bug reports. -- Control frame information ----------------------------------------------- c:0003 p:---- s:0012 e:000011 CFUNC :update c:0002 p:0027 s:0007 E:001338 EVAL crash.rb:5 [FINISH] c:0001 p:0000 s:0003 E:000170 DUMMY [FINISH] -- Ruby level backtrace information ---------------------------------------- crash.rb:5:in `<main>' crash.rb:5:in `update' -- C level backtrace information ------------------------------------------- /Users/USER/.local/share/rtx/installs/ruby/3.2.2/lib/libruby.3.2.dylib(rb_vm_bugreport+0x9a0) [0x1010e7e58] /Users/USER/.local/share/rtx/installs/ruby/3.2.2/lib/libruby.3.2.dylib(rb_bug_without_die+0x15c) [0x100f22888] /Users/USER/.local/share/rtx/installs/ruby/3.2.2/lib/libruby.3.2.dylib(rb_bug+0x1c) [0x1010f4d64] /Users/USER/.local/share/rtx/installs/ruby/3.2.2/lib/libruby.3.2.dylib(str_buf_cat4+0x0) [0x1010660f0] 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/opt/homebrew/Cellar/openssl(a)3/3.2.0_1/lib/libcrypto.3.dylib 103f14000-103fd4000 r-- /opt/homebrew/Cellar/openssl(a)3/3.2.0_1/lib/libcrypto.3.dylib 103fd4000-104400000 r-- /Users/USER/.local/share/rtx/installs/ruby/3.2.2/lib/libruby.3.2.dylib 115e00000-115f00000 rw- 118000000-120000000 rw- 125e00000-125f00000 rw- 125f00000-126000000 rw- 126000000-126800000 rw- 126800000-126900000 rw- 126900000-126904000 rw- 127000000-127800000 rw- 127800000-128000000 rw- 128000000-130000000 rw- 130000000-132000000 rw- 16b7e8000-16efec000 --- 16efec000-16f7e8000 rw- 16f7e8000-16f7ec000 --- 16f7ec000-16f874000 rw- 180000000-1e0000000 r-- 1e0000000-1e1818000 r-- 1e1818000-1e1840000 rw- 1e1840000-1e2000000 rw- 1e2000000-1e278c000 r-- 1e278c000-1e683c000 rw- 1e683c000-1eba78000 r-- 1eba78000-1ec000000 r-- 1ec000000-23c000000 r-- 23c000000-23c2bc000 r-- 23c2bc000-23d8dc000 rw- 23d8dc000-241da0000 rw- 241da0000-244344000 r-- 244344000-246000000 r-- 246000000-280000000 r-- fc0000000-1000000000 --- 1000000000-7000000000 --- 600000000000-600020000000 rw- [IMPORTANT] Don't forget to include the Crash Report log file under DiagnosticReports directory in bug reports. [1] 68030 abort ruby crash.rb ``` ---Files-------------------------------- ruby-2024-02-04-165501.ips (11 KB) -- https://bugs.ruby-lang.org/

2 1

[ruby-core:116579] media online
by alasanbae126＠gmail.com 04 Feb '24

04 Feb '24

https://cinema21.site https://livesinema.com https://bingcinema.site https://mez.ink/alasanbae126

1 0

[ruby-core:116178] [Ruby master Bug#20178] Out of bounds stack read on Array#first when built with -O0
by jhawthorn (John Hawthorn) 04 Feb '24

04 Feb '24

Issue #20178 has been reported by jhawthorn (John Hawthorn). ---------------------------------------- Bug #20178: Out of bounds stack read on Array#first when built with -O0 https://bugs.ruby-lang.org/issues/20178 * Author: jhawthorn (John Hawthorn) * Status: Open * Priority: Normal * ruby -v: 3.3.0 * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: REQUIRED ---------------------------------------- https://github.com/ruby/ruby/pull/9499 Previously on builds with optimizations disabled, we could end up with an out of bounds read trying to access a non-existent local variable in the compiled `Primitive.cexpr!`. This occurred only when we had all of: * built with `-O0` * Leaf builtin * `Primitive.mandatory_only` * "no args builtin", called by [vm_call_single_noarg_inline_builtin](https://github.com/ruby/ruby/pull/7486) * The stack is escaped to the heap via binding or a proc This is because `mk_builtin_loader` generated reads for all locals regardless of whether they were used and in the case we generated a mandatory_only iseq that would include more variables than were actually available. On optimized builds, the invalid accesses would be optimized away, and this also was often unnoticed as the invalid access would just hit another part of the stack unless it had been escaped to the heap. However we should fix (and backport) this both because and so that we can use ASAN and debug builds. --- ``` ruby def foo binding [].first end foo foo ``` ``` ================================================================= ==1542964==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x603000045fc8 at pc 0x55cb2958b7d0 bp 0x7ffcdc9f1f00 sp 0x7ffcdc9f1ef0 READ of size 8 at 0x603000045fc8 thread T0 #0 0x55cb2958b7cf in rb_vm_lvar /home/jhawthorn/src/ruby/builtin.h:103 #1 0x55cb295ab586 in builtin_inline_class_104 /home/jhawthorn/src/ruby/array.rbinc:14 #2 0x55cb29b2243e in builtin_invoker0 /home/jhawthorn/src/ruby/vm_insnhelper.c:6724 #3 0x55cb29b09556 in vm_call_single_noarg_inline_builtin /home/jhawthorn/src/ruby/vm_insnhelper.c:2931 #4 0x55cb29b1d112 in vm_sendish /home/jhawthorn/src/ruby/vm_insnhelper.c:5581 #5 0x55cb29b34533 in vm_exec_core /home/jhawthorn/src/ruby/insns.def:834 #6 0x55cb29b6c9a3 in rb_vm_exec /home/jhawthorn/src/ruby/vm.c:2487 #7 0x55cb29b6f338 in rb_iseq_eval_main /home/jhawthorn/src/ruby/vm.c:2753 #8 0x55cb296f7188 in rb_ec_exec_node /home/jhawthorn/src/ruby/eval.c:287 #9 0x55cb296f74e4 in ruby_run_node /home/jhawthorn/src/ruby/eval.c:328 #10 0x55cb29587d51 in rb_main main.c:39 #11 0x55cb29587eb1 in main main.c:58 #12 0x7f3295558ccf (/usr/lib/libc.so.6+0x27ccf) (BuildId: 8bfe03f6bf9b6a6e2591babd0bbc266837d8f658) #13 0x7f3295558d89 in __libc_start_main (/usr/lib/libc.so.6+0x27d89) (BuildId: 8bfe03f6bf9b6a6e2591babd0bbc266837d8f658) #14 0x55cb29587bb4 in _start (/home/jhawthorn/src/ruby/miniruby+0x1a7bb4) (BuildId: acaf2fc9526d3e1423a2fcbd072ee6aeb3e5c4c6) 0x603000045fc8 is located 8 bytes before 32-byte region [0x603000045fd0,0x603000045ff0) allocated by thread T0 here: #0 0x7f32958e1359 in __interceptor_malloc /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_malloc_linux.cpp:69 #1 0x55cb2975348a in objspace_xmalloc0 /home/jhawthorn/src/ruby/gc.c:12625 #2 0x55cb29753940 in ruby_xmalloc2_body /home/jhawthorn/src/ruby/gc.c:12872 #3 0x55cb29759643 in ruby_xmalloc2 /home/jhawthorn/src/ruby/gc.c:14473 #4 0x55cb29b62b80 in vm_make_env_each /home/jhawthorn/src/ruby/vm.c:977 #5 0x55cb29b62dc0 in vm_make_env_object /home/jhawthorn/src/ruby/vm.c:1010 #6 0x55cb29b65271 in rb_vm_make_binding /home/jhawthorn/src/ruby/vm.c:1433 #7 0x55cb298cbdb5 in rb_binding_new /home/jhawthorn/src/ruby/proc.c:347 #8 0x55cb298cbdc8 in rb_f_binding /home/jhawthorn/src/ruby/proc.c:397 #9 0x55cb29b0ca60 in ractor_safe_call_cfunc_0 /home/jhawthorn/src/ruby/vm_insnhelper.c:3306 #10 0x55cb29b0eb89 in vm_call_cfunc_with_frame_ /home/jhawthorn/src/ruby/vm_insnhelper.c:3490 #11 0x55cb29b0f149 in vm_call_cfunc_with_frame /home/jhawthorn/src/ruby/vm_insnhelper.c:3518 #12 0x55cb29b1d112 in vm_sendish /home/jhawthorn/src/ruby/vm_insnhelper.c:5581 #13 0x55cb29b34533 in vm_exec_core /home/jhawthorn/src/ruby/insns.def:834 #14 0x55cb29b6c9a3 in rb_vm_exec /home/jhawthorn/src/ruby/vm.c:2487 #15 0x55cb29b6f338 in rb_iseq_eval_main /home/jhawthorn/src/ruby/vm.c:2753 #16 0x55cb296f7188 in rb_ec_exec_node /home/jhawthorn/src/ruby/eval.c:287 #17 0x55cb296f74e4 in ruby_run_node /home/jhawthorn/src/ruby/eval.c:328 #18 0x55cb29587d51 in rb_main main.c:39 #19 0x55cb29587eb1 in main main.c:58 #20 0x7f3295558ccf (/usr/lib/libc.so.6+0x27ccf) (BuildId: 8bfe03f6bf9b6a6e2591babd0bbc266837d8f658) SUMMARY: AddressSanitizer: heap-buffer-overflow /home/jhawthorn/src/ruby/builtin.h:103 in rb_vm_lvar Shadow bytes around the buggy address: 0x603000045d00: fd fd fd fa fa fa fd fd fd fa fa fa 00 00 00 00 0x603000045d80: fa fa 00 00 04 fa fa fa fd fd fd fd fa fa 00 00 0x603000045e00: 00 00 fa fa 00 00 00 fa fa fa 00 00 00 fa fa fa 0x603000045e80: 00 00 00 fa fa fa 00 00 00 fa fa fa 00 00 00 00 0x603000045f00: fa fa 00 00 00 00 fa fa 00 00 00 00 fa fa 00 00 =>0x603000045f80: 00 00 fa fa 00 00 00 00 fa[fa]00 00 00 00 fa fa 0x603000046000: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x603000046080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x603000046100: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x603000046180: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x603000046200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==1542964==ABORTING ``` -- https://bugs.ruby-lang.org/

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[ruby-core:116129] [Ruby master Bug#20172] Socket.addrinfo failing randomly
by mwaldvogel (Michael Waldvogel) 03 Feb '24

03 Feb '24

Issue #20172 has been reported by mwaldvogel (Michael Waldvogel). ---------------------------------------- Bug #20172: Socket.addrinfo failing randomly https://bugs.ruby-lang.org/issues/20172 * Author: mwaldvogel (Michael Waldvogel) * Status: Open * Priority: Normal * ruby -v: ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [x86_64-linux] * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- I've recently updated one of my linux systems (Gentoo) to glibc 2.38 (that was the only change). After the update most of the time the below error happens. Among other things this breaks rubygems for me. I've reinstalled ruby 3.2.2 with rvm and didn't encounter the issue. The issue however remained even after reinstalling ruby 3.3.0 and even with ruby master. Since this goes back to getaddrinfo (which is working without any issues outside of ruby) and there seems to be only one bigger change to stdlib socket, I'm assuming the problem was introduced with https://bugs.ruby-lang.org/issues/19965 ``` 3.3.0 :001 > require 'socket' => true 3.3.0 :002 > Socket.getaddrinfo('rubygems.org', 443) (irb):2:in `getaddrinfo': getaddrinfo: Temporary failure in name resolution (Socket::ResolutionError) from (irb):2:in `<main>' from <internal:kernel>:187:in `loop' from /usr/local/rvm/rubies/ruby-3.3.0/lib/ruby/gems/3.3.0/gems/irb-1.11.0/exe/irb:9:in `<top (required)>' from /usr/local/rvm/rubies/ruby-3.3.0/bin/irb:25:in `load' from /usr/local/rvm/rubies/ruby-3.3.0/bin/irb:25:in `<main>' 3.3.0 :003 > Socket.getaddrinfo('rubygems.org', 443) (irb):3:in `getaddrinfo': getaddrinfo: Temporary failure in name resolution (Socket::ResolutionError) from (irb):3:in `<main>' from <internal:kernel>:187:in `loop' from /usr/local/rvm/rubies/ruby-3.3.0/lib/ruby/gems/3.3.0/gems/irb-1.11.0/exe/irb:9:in `<top (required)>' from /usr/local/rvm/rubies/ruby-3.3.0/bin/irb:25:in `load' from /usr/local/rvm/rubies/ruby-3.3.0/bin/irb:25:in `<main>' 3.3.0 :004 > Socket.getaddrinfo('rubygems.org', 443) => [["AF_INET", 443, "151.101.193.227", "151.101.193.227", 2, 1, 6], ["AF_INET", 443, "151.101.193.227", "151.101.193.227", 2, 2, 17], ["AF_INET", 443, "151.101.193.227", "151.101.193.227", 2, 3, 0], ... ["AF_INET6", 443, "2a04:4e42::483", "2a04:4e42::483", 10, 1, 6], ["AF_INET6", 443, "2a04:4e42::483", "2a04:4e42::483", 10, 2, 17], ["AF_INET6", 443, "2a04:4e42::483", "2a04:4e42::483", 10, 3, 0]] 3.3.0 :005 > ``` -- https://bugs.ruby-lang.org/

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[ruby-core:112552] [Ruby master Bug#19461] Time.local performance tanks in forked process (on macOS only?)
by ioquatix (Samuel Williams) 02 Feb '24

02 Feb '24

Issue #19461 has been reported by ioquatix (Samuel Williams). ---------------------------------------- Bug #19461: Time.local performance tanks in forked process (on macOS only?) https://bugs.ruby-lang.org/issues/19461 * Author: ioquatix (Samuel Williams) * Status: Open * Priority: Normal * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- The following program demonstrates a performance regression in forked child processes when invoking `Time.local`: ```ruby require 'benchmark' require 'time' def sir_local_alot result = Benchmark.measure do 10_000.times do tm = ::Time.local(2023) end end $stderr.puts result end sir_local_alot pid = fork do sir_local_alot end Process.wait(pid) ``` On Linux the performance is similar, but on macOS, the performance is over 100x worse on my M1 laptop. -- https://bugs.ruby-lang.org/

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[ruby-core:116223] [Ruby master Bug#20188] `Module#const_source_location` returns wrong information when real constant was defined but autoload is still ongoing
by byroot (Jean Boussier) 31 Jan '24

31 Jan '24

Issue #20188 has been reported by byroot (Jean Boussier). ---------------------------------------- Bug #20188: `Module#const_source_location` returns wrong information when real constant was defined but autoload is still ongoing https://bugs.ruby-lang.org/issues/20188 * Author: byroot (Jean Boussier) * Status: Open * Priority: Normal * ruby -v: ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [arm64-darwin23] * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- Ref: https://github.com/fxn/zeitwerk/issues/281 `const_source_location` keeps returning the location of the `autoload` call, even after the real constant was defined. It only starts returning the real constant location once the autoload was fully completed. ```ruby # /tmp/autoload.rb File.write("/tmp/const.rb", <<~RUBY) module Const LOCATION = Object.const_source_location(:Const) end RUBY autoload :Const, "/tmp/const" p Const::LOCATION ``` Expected Output: ```ruby ["/tmp/const.rb", 1] ``` Actual Output: ```ruby ["/tmp/autoload.rb", 8] ``` Potential patch: https://github.com/ruby/ruby/pull/9549 -- https://bugs.ruby-lang.org/

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[ruby-core:116103] [Ruby master Bug#20166] Backport 149373c to Ruby 3.3
by hsbt (Hiroshi SHIBATA) 31 Jan '24

31 Jan '24

Issue #20166 has been reported by hsbt (Hiroshi SHIBATA). ---------------------------------------- Bug #20166: Backport 149373c to Ruby 3.3 https://bugs.ruby-lang.org/issues/20166 * Author: hsbt (Hiroshi SHIBATA) * Status: Closed * Priority: Normal * Backport: 3.0: DONTNEED, 3.1: DONTNEED, 3.2: DONTNEED, 3.3: REQUIRED ---------------------------------------- https://github.com/ruby/ruby/pull/9457 -- https://bugs.ruby-lang.org/

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[ruby-core:116045] [Ruby master Bug#20157] Regression in GC.measure_total_time
by rianmcguire (Rian McGuire) 31 Jan '24

31 Jan '24

Issue #20157 has been reported by rianmcguire (Rian McGuire). ---------------------------------------- Bug #20157: Regression in GC.measure_total_time https://bugs.ruby-lang.org/issues/20157 * Author: rianmcguire (Rian McGuire) * Status: Open * Priority: Normal * ruby -v: ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [x86_64-linux] * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- Setting `GC.measure_total_time = false` is no longer disabling GC time measurement in Ruby 3.3.0. Reproduction script: ``` ruby puts RUBY_DESCRIPTION GC.measure_total_time = false puts "measure_total_time is now false" puts "GC.stat(:time) = #{GC.stat(:time)}" puts "There should be no further clock_gettime syscalls" # Generate some garbage Random.new.bytes(100 * 1024 * 1024) GC.start puts "GC.stat(:time) = #{GC.stat(:time)}. This should be unchanged from above" ``` Ruby 3.2.2 (expected behaviour): ``` $ strace --trace=clock_gettime --signal=none ruby --disable-gems bug.rb clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=0, tv_nsec=45735959}) = 0 ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux] measure_total_time is now false GC.stat(:time) = 0 There should be no further clock_gettime syscalls GC.stat(:time) = 0. This should be unchanged from above +++ exited with 0 +++ ``` Ruby 3.3.0: ``` $ strace --trace=clock_gettime --signal=none ruby --disable-gems bug.rb clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=0, tv_nsec=31784505}) = 0 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [x86_64-linux] measure_total_time is now false GC.stat(:time) = 0 There should be no further clock_gettime syscalls clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=0, tv_nsec=47132055}) = 0 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=0, tv_nsec=47576566}) = 0 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=0, tv_nsec=47586656}) = 0 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=0, tv_nsec=47852906}) = 0 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=0, tv_nsec=180726043}) = 0 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=0, tv_nsec=181242023}) = 0 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=0, tv_nsec=181248873}) = 0 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=0, tv_nsec=191276005}) = 0 GC.stat(:time) = 11. This should be unchanged from above +++ exited with 0 +++ ``` It appears that this was caused by commit https://github.com/ruby/ruby/commit/93ac7405b80cc61930d73da04441fa09af1851e1 -- the test for `MEASURE_GC` inside in `gc_enter_event_measure_p` was lost in the refactoring. -- https://bugs.ruby-lang.org/

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