Issue #20045 has been updated by mame (Yusuke Endoh). Status changed from Open to Assigned Assignee set to jemmai (Jemma Issroff) @jemmai Could you take a look at this? ---------------------------------------- Bug #20045: `TestDir#test_home` fails on i686 https://bugs.ruby-lang.org/issues/20045#change-105724 * Author: vo.x (Vit Ondruch) * Status: Assigned * Priority: Normal * Assignee: jemmai (Jemma Issroff) * ruby -v: ruby 3.2.2 (2023-03-30 revision e51014f9c0) [i686-linux] * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- This is followup to #19147. Testing on Fedora 38 and Fedora Rawhide, we are facing this test failure: ~~~ $ tar xf build/SOURCES/ruby-3.2.2.tar.xz $ cd ruby-3.2.2/ $ ./configure && make ... snip ... --- Configuration summary for ruby version 3.2.2 * Installation prefix: /usr/local * exec prefix: ${prefix} * arch: i686-linux * site arch: ${arch} * RUBY_BASE_NAME: ruby * ruby lib prefix: ${libdir}/${RUBY_BASE_NAME} * site libraries path: ${rubylibprefix}/${sitearch} * vendor path: ${rubylibprefix}/vendor_ruby * target OS: linux * compiler: gcc * with thread: pthread * with coroutine: x86 * enable shared libs: no * dynamic library ext: so * CFLAGS: ${optflags} ${debugflags} ${warnflags} * LDFLAGS: -L. -fstack-protector-strong -rdynamic -Wl,-export-dynamic * DLDFLAGS: -Wl,--compress-debug-sections=zlib * optflags: -O3 -fno-fast-math * debugflags: -ggdb3 * warnflags: -Wall -Wextra -Wdeprecated-declarations -Wdiv-by-zero -Wduplicated-cond -Wimplicit-function-declaration -Wimplicit-int -Wmisleading-indentation -Wpointer-arith -Wwrite-strings -Wold-style-definition \ -Wimplicit-fallthrough=0 -Wmissing-noreturn -Wno-cast-function-type -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-packed-bitfield-compat \ -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wsuggest-attribute=format -Wsuggest-attribute=noreturn -Wunused-variable -Wundef * strip command: strip -S -x * install doc: rdoc * MJIT support: yes * YJIT support: no * man page type: doc --- ... snip ... $ LANG=C make test-all 'TESTS=-v -n /TestDir#test_home/' config.status: creating ruby-runner.h making mjit_build_dir.so generating i686-linux-fake.rb i686-linux-fake.rb updated Run options: --seed=10517 "--ruby=./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems" --excludes-dir=./test/excludes --name=!/memory_leak/ -v -n /TestDir#test_home/ # Running tests: [1/0] TestDir#test_home = 0.00 s 1) Error: TestDir#test_home: RuntimeError: can't set length of shared string /builddir/ruby-3.2.2/test/ruby/test_dir.rb:557:in `expand_path' /builddir/ruby-3.2.2/test/ruby/test_dir.rb:557:in `block in test_home' Finished tests in 4.164691s, 0.2401 tests/s, 1.6808 assertions/s. 1 tests, 7 assertions, 0 failures, 1 errors, 0 skips ruby -v: ruby 3.2.2 (2023-03-30 revision e51014f9c0) [i686-linux] make: *** [uncommon.mk:855: yes-test-all] Error 1 ~~~ Please note that having the `C` locale is essential. The test passes just fine with e.g. `C.UTF-8` locale. We were able to reduce the test case to the following: ~~~ $ whoami mockbuild $ echo 'File.expand_path("~mockbuild")' > test.rb $ LANG=C RUBYLIB=/builddir/ruby-3.2.2/.ext/i686-linux LD_LIBRARY_PATH=. ./ruby --disable-gems test.rb test.rb:1:in `expand_path': can't set length of shared string (RuntimeError) from test.rb:1:in `<main>' ~~~ As I said earlier, the `LANG=C` is essential as well as the `RUBYLIB=/builddir/ruby-3.2.2/.ext/i386-linux`. Adding the path to `RUBYLIB` enables Ruby to load the following libraries: ~~~ /builddir/ruby-3.2.2/.ext/i686-linux/enc/encdb.so /builddir/ruby-3.2.2/.ext/i686-linux/enc/trans/transdb.so ~~~ And that makes the difference. Also, the `File.expand_path("~mockbuild")` must be in some file, replacing this by `-e 'File.expand_path("~mockbuild")'` does not reproduce the issue. We also believe that this was introduced by https://github.com/ruby/ruby/pull/6699, specifically by commit:git|5246f4027ec574e77809845e1b1f7822cc2a5cef and fixed in master by commit:git|b4571097df4a6bd848f1195026d82a92f3a7f9d8. Unfortunately, we were not able to discover what is the mechanism behind this, why this depends on locale, why the test must be in file, why the string is shared etc. But I hope we have provided enough details for someone else more knowledgeable. Some background for this issue is also available here: https://src.fedoraproject.org/rpms/ruby/pull-request/164 -- https://bugs.ruby-lang.org/