v2.5.0-rc-0-g52f847f

Version 2.5.0, release candidate

• Addition: added --default-timeout CLI switch to set a fallback timeout
  for tests that have no timeout set. Unlike --timeout, which caps the
  timeout of every test, explicitly timed tests are left untouched
  (Matéo LE FLEM).
• Addition: added --show-skipped CLI switch to show the number of skipped
  tests in the synthesis line.
• Breaking: ABI incompatibility with prior versions of criterion. You
  must recompile your tests.
• Change: cr_get_redirected_stdout(), cr_get_redirected_stderr() and
  cr_get_redirected_stdin() (and their C++ counterparts) now return a
  stream owned by the caller, who is responsible for closing it.
  Closing that stream no longer interferes with the standard stream
  assertions.
• Change: the standard stream assertions (cr_assert_stdout_eq_str and
  friends) now flush the stream before comparing its contents, so tests
  no longer need to fflush() or disable buffering beforehand. Each
  assertion consumes the output written since the previous one.
• Fix: fixed crash when a standard stream assertion was used more than
  once in a test, or when the test wrote to the stream after asserting
  on it.
• Fix: standard stream assertions now fail with an explicit message
  instead of hanging when the stream was never redirected.
• Fix: fixed any() only passing when its last operand was true
  (Ray Chern).
• Fix: fixed result propagation of nested assertion combinators, and
  not() being ignored when applied to another combinator.
• Fix: sibling assertion combinators, like all(any(...), any(...)), now
  compile.
• Fix: failing not() and none() operands were reported with
  "<no difference -- this is a user bug in the object stringifier>"
  instead of their values. Failing combinators now also print a header
  line above their failing operands.
• Fix: assertion failures whose value diff is empty (because the user
  stringifier produced the same output for different values) now print
  the raw actual and expected values instead of a generic message.
• Fix: fixed plain expressions in the new assertion API failing when
  they evaluated to a non-zero value other than 1, like
  cr_assert(flags & 4).
• Fix: plain expressions starting with an operator, a literal or a cast
  can now be passed to the new assertion API by wrapping them in an
  extra pair of parentheses, like cr_assert((!x)).
• Fix: fixed undefined behavior (null pointer arithmetic, reported by
  UBSan) when computing the length of array type tags in the new
  assertion API.
• Fix: fixed multiple definition errors when ReportHook was used on the
  same line in different files, or several times in one macro
  (Cade-Peterson).
• Fix: tests, suites, parameterized tests and report hooks are no
  longer discarded by the linker when building with optimizations or
  --gc-sections (Jerry James).
• Fix: the cleanup function of parameterized tests was called as soon
  as the last test worker had been spawned rather than after all
  workers exited, which crashed with --jobs > 1.
• Fix: skipped tests with an expected .signal or .exit_code are no
  longer reported as failed.
• Fix: criterion::allocator no longer uses std::allocator, which
  is deprecated in C++17 and removed in C++20.
• Misc: the build system now detects a system-wide klib installation
  instead of always falling back to the wrap.
• Misc: replaced the discontinued Cirrus CI; FreeBSD, macOS (x86-64) and
  Windows are tested on GitHub Actions again.
• Misc: fixed the extraction of translatable messages and updated the
  German and French translations.
• Misc: various documentation fixes.
• Misc: various build system fixes.
• Misc: various updates to dependencies.