IO#ungetc never changes the file position

[YO4]

Whether or not IO uses encoding conversion, IO#ungetc is changed to not modify the file position.

https://bugs.ruby-lang.org/issues/21682

[launchable-app]

❌ 21/59050 Tests Failed

test/net/http/test_https.rb#test_certificate_verify_failure

Error:
TestNetHTTPS#test_certificate_verify_failure:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:235:in 'TestNetHTTPS#test_certificate_verify_failure'

test/net/http/test_https.rb#test_fail_if_verify_hostname_is_true

Error:
TestNetHTTPS#test_fail_if_verify_hostname_is_true:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:224:in 'block in TestNetHTTPS#test_fail_if_verify_hostname_is_true'
    /home/runner/work/ruby/ruby/src/test/net/http/utils.rb:354:in 'TestNetHTTPUtils.clean_http_proxy_env'
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:223:in 'TestNetHTTPS#test_fail_if_verify_hostname_is_true'

test/net/http/test_https.rb#test_get

Error:
TestNetHTTPS#test_get:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:36:in 'TestNetHTTPS#test_get'

test/net/http/test_https.rb#test_get_SNI

Error:
TestNetHTTPS#test_get_SNI:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:54:in 'TestNetHTTPS#test_get_SNI'

test/net/http/test_https.rb#test_get_SNI_failure

Error:
TestNetHTTPS#test_get_SNI_failure:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:113:in 'block in TestNetHTTPS#test_get_SNI_failure'
    /home/runner/work/ruby/ruby/src/test/net/http/utils.rb:354:in 'TestNetHTTPUtils.clean_http_proxy_env'
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:112:in 'TestNetHTTPS#test_get_SNI_failure'

16 more failed tests

test/net/http/test_https.rb#test_max_version

Error:
TestNetHTTPS#test_max_version:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /Users/runner/work/ruby/ruby/src/test/net/http/test_https.rb:275:in 'TestNetHTTPS#test_max_version'

test/net/http/test_https.rb#test_min_version

Error:
TestNetHTTPS#test_min_version:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /Users/runner/work/ruby/ruby/src/test/net/http/test_https.rb:265:in 'TestNetHTTPS#test_min_version'

test/net/http/test_https.rb#test_post

Error:
TestNetHTTPS#test_post:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /Users/runner/work/ruby/ruby/src/test/net/http/test_https.rb:128:in 'TestNetHTTPS#test_post'

test/net/http/test_https.rb#test_session_reuse

Error:
TestNetHTTPS#test_session_reuse:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /Users/runner/work/ruby/ruby/src/test/net/http/test_https.rb:142:in 'TestNetHTTPS#test_session_reuse'

test/net/http/test_https.rb#test_session_reuse_but_expire

Error:
TestNetHTTPS#test_session_reuse_but_expire:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /Users/runner/work/ruby/ruby/src/test/net/http/test_https.rb:171:in 'TestNetHTTPS#test_session_reuse_but_expire'

test/net/http/test_https.rb#test_skip_hostname_verification

Error:
TestNetHTTPS#test_skip_hostname_verification:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:211:in 'block in TestNetHTTPS#test_skip_hostname_verification'
    /home/runner/work/ruby/ruby/src/test/net/http/utils.rb:354:in 'TestNetHTTPUtils.clean_http_proxy_env'
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:210:in 'TestNetHTTPS#test_skip_hostname_verification'

test/net/http/test_https.rb#test_timeout_during_SSL_handshake

Error:
TestNetHTTPS#test_timeout_during_SSL_handshake:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:250:in 'block in TestNetHTTPS#test_timeout_during_SSL_handshake'
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:247:in 'IO.open'
    /home/runner/work/ruby/ruby/src/test/net/http/test_https.rb:247:in 'TestNetHTTPS#test_timeout_during_SSL_handshake'

test/net/http/test_https.rb#test_verify_none

Error:
TestNetHTTPS#test_verify_none:
Test::Unit::ProxyError: uninitialized constant TestNetHTTPS::Net
    /Users/runner/work/ruby/ruby/src/test/net/http/test_https.rb:201:in 'TestNetHTTPS#test_verify_none'

test/open-uri/test_ftp.rb#test_ftp_over_http_proxy

Error:
TestOpenURIFtp#test_ftp_over_http_proxy:
Test::Unit::ProxyError: /home/runner/work/ruby/ruby/build/.ext/x86_64-linux/io/wait.so: undefined symbol: ruby_abi_version - ruby_abi_version
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:296:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:296:in 'OpenURI.open_http'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:840:in 'URI::FTP#buffer_open'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:235:in 'block in OpenURI.open_loop'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:233:in 'Kernel#catch'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:233:in 'OpenURI.open_loop'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:165:in 'OpenURI.open_uri'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:811:in 'OpenURI::OpenRead#open'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:819:in 'OpenURI::OpenRead#read'
    /home/runner/work/ruby/ruby/src/test/open-uri/test_ftp.rb:180:in 'block (2 levels) in TestOpenURIFtp#test_ftp_over_http_proxy'
    /home/runner/work/ruby/ruby/src/test/open-uri/test_ftp.rb:12:in 'TestOpenURIFtp#with_env'
    /home/runner/work/ruby/ruby/src/test/open-uri/test_ftp.rb:179:in 'block in TestOpenURIFtp#test_ftp_over_http_proxy'
    /home/runner/work/ruby/ruby/src/test/open-uri/test_ftp.rb:164:in 'IO.open'
    /home/runner/work/ruby/ruby/src/test/open-uri/test_ftp.rb:164:in 'TestOpenURIFtp#test_ftp_over_http_proxy'

test/open-uri/test_ftp.rb#test_ftp_over_http_proxy_auth

Error:
TestOpenURIFtp#test_ftp_over_http_proxy_auth:
Test::Unit::ProxyError: /home/runner/work/ruby/ruby/build/.ext/x86_64-linux/io/wait.so: undefined symbol: ruby_abi_version - ruby_abi_version
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:296:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:296:in 'OpenURI.open_http'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:840:in 'URI::FTP#buffer_open'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:235:in 'block in OpenURI.open_loop'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:233:in 'Kernel#catch'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:233:in 'OpenURI.open_loop'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:165:in 'OpenURI.open_uri'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:811:in 'OpenURI::OpenRead#open'
    /home/runner/work/ruby/ruby/src/lib/open-uri.rb:819:in 'OpenURI::OpenRead#read'
    /home/runner/work/ruby/ruby/src/test/open-uri/test_ftp.rb:207:in 'block in TestOpenURIFtp#test_ftp_over_http_proxy_auth'
    /home/runner/work/ruby/ruby/src/test/open-uri/test_ftp.rb:191:in 'IO.open'
    /home/runner/work/ruby/ruby/src/test/open-uri/test_ftp.rb:191:in 'TestOpenURIFtp#test_ftp_over_http_proxy_auth'

test/ruby/test_box.rb#test_loading_extension_libs_in_main_box

Error:
TestBox#test_loading_extension_libs_in_main_box:
Test::Unit::ProxyError: /tmp/rubytest.uljn4w/_ruby_box_p61576_2_io+wait.so: undefined symbol: ruby_abi_version - ruby_abi_version
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in 'Ruby::Box::Loader#require'
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in 'Ruby::Box::Loader#require'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/test/ruby/test_box.rb:799:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/test/ruby/test_box.rb:799:in 'Ruby::Box::Loader#require'
    /home/runner/work/ruby/ruby/src/test/ruby/test_box.rb:799:in '<main>'
    /home/runner/work/ruby/ruby/src/test/ruby/test_box.rb:781:in 'TestBox#test_loading_extension_libs_in_main_box'

test/ruby/test_require_lib.rb#test_thread_size:net/http

Error:
TestRequireLib#test_thread_size:net/http:
Test::Unit::ProxyError: /home/runner/work/ruby/ruby/build/.ext/x86_64-linux/io/wait.so: undefined symbol: ruby_abi_version - ruby_abi_version
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:23:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:23:in '<main>'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:20:in 'block (2 levels) in <class:TestRequireLib>'

test/ruby/test_require_lib.rb#test_thread_size:net/https

Error:
TestRequireLib#test_thread_size:net/https:
Test::Unit::ProxyError: /home/runner/work/ruby/ruby/build/.ext/x86_64-linux/io/wait.so: undefined symbol: ruby_abi_version - ruby_abi_version
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/http.rb:23:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/lib/net/https.rb:22:in 'Kernel#require_relative'
    /home/runner/work/ruby/ruby/src/lib/net/https.rb:22:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:23:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:23:in '<main>'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:20:in 'block (2 levels) in <class:TestRequireLib>'

test/ruby/test_require_lib.rb#test_thread_size:net/protocol

Error:
TestRequireLib#test_thread_size:net/protocol:
Test::Unit::ProxyError: /home/runner/work/ruby/ruby/build/.ext/x86_64-linux/io/wait.so: undefined symbol: ruby_abi_version - ruby_abi_version
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/net/protocol.rb:24:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:23:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:23:in '<main>'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:20:in 'block (2 levels) in <class:TestRequireLib>'

test/ruby/test_require_lib.rb#test_thread_size:resolv

Error:
TestRequireLib#test_thread_size:resolv:
Test::Unit::ProxyError: /home/runner/work/ruby/ruby/build/.ext/x86_64-linux/io/wait.so: undefined symbol: ruby_abi_version - ruby_abi_version
    /home/runner/work/ruby/ruby/src/lib/resolv.rb:5:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/lib/resolv.rb:5:in '<top (required)>'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:23:in 'Kernel#require'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:23:in '<main>'
    /home/runner/work/ruby/ruby/src/test/ruby/test_require_lib.rb:20:in 'block (2 levels) in <class:TestRequireLib>'

test/test_extlibs.rb#test_existence_of_io/wait

Failure:
TestExtLibs#test_existence_of_io/wait [/home/runner/work/ruby/ruby/src/test/test_extlibs.rb:20]:
extension library `io/wait' is not found
extconf.h is:
/* begin */
1: #ifndef EXTCONF_H
2: #define EXTCONF_H
3: #endif
/* end */

.
Exception raised:
<#<LoadError: /home/runner/work/ruby/ruby/build/.ext/x86_64-linux/io/wait.so: undefined symbol: ruby_abi_version - ruby_abi_version>>
Backtrace:
  -:13:in 'Kernel#require'
  -:13:in 'block in <main>'.

[-> View Test suite health in main branch]