我已经玩了几个小时这个问题了，我想我终于可以重复了。
当我开始一个新的Rstudio会话时，一切正常，没有问题。我甚至可以加载对象并执行正确的代码。
编辑当前文件时出现问题。一旦我编辑该文件，我就不能再执行命令了，当我查看top的CPU使用情况时，它显示rsession正在使用100％CPU并且它永远不会停止。在此期间，我可以继续编辑文件，Rstudio GUI似乎工作正常，但代码执行被冻结。我也无法在那时保存文件。
编辑：我尝试编辑的文档类型是.Rmd降价文档。我只是尝试在非markdown R脚本中运行相同的代码，它运行正常。这个问题必须以某种方式与降价相关。
EDIT2：^^ nevermind，即使不是.Rmd文件，问题仍然存在。将脚本保存为普通的.R脚本后，它会导致rsession再次挂起。
EDIT3：我忘了提到这是最近发生的事情，可能是由更新的R版本，Rstudio版本或系统库引起的。昨天我能够在Rstudio中编辑这个脚本而没有任何问题。我本周更新了Rstudio，但直到几天后才看到这个问题。我很快就更新了我的系统，之后可能还更新了R版本。我正在努力了解这是如何导致当前问题的。
EDIT4：找到导致错误的代码段，发布在下面。
Thread 1 "rsession" received signal SIGTERM, Terminated.
0x00007fbd0cb5ab38 in ?? () from /usr/lib/R/lib/libR.so
(gdb) backtrace
#0 0x00007fbd0cb5ab38 in ?? () from /usr/lib/R/lib/libR.so
#1 0x00007fbd0cb71196 in ?? () from /usr/lib/R/lib/libR.so
#2 0x00007fbd0cb72499 in ?? () from /usr/lib/R/lib/libR.so
#3 0x00007fbd0cb6ae8c in Rf_eval () from /usr/lib/R/lib/libR.so
#4 0x00007fbd0cb6b3b9 in ?? () from /usr/lib/R/lib/libR.so
#5 0x00007fbd0cb6b878 in ?? () from /usr/lib/R/lib/libR.so
#6 0x00007fbd0cb6132d in ?? () from /usr/lib/R/lib/libR.so
#7 0x00007fbd0cb6aa88 in Rf_eval () from /usr/lib/R/lib/libR.so
#8 0x00007fbd0cb6b3b9 in ?? () from /usr/lib/R/lib/libR.so
#9 0x00007fbd0cb6b878 in ?? () from /usr/lib/R/lib/libR.so
#10 0x00007fbd0cb6132d in ?? () from /usr/lib/R/lib/libR.so
#11 0x00007fbd0cb6aa88 in Rf_eval () from /usr/lib/R/lib/libR.so
#12 0x00007fbd0cb6b3b9 in ?? () from /usr/lib/R/lib/libR.so
#13 0x00007fbd0cb6b878 in ?? () from /usr/lib/R/lib/libR.so
#14 0x00007fbd0cb6132d in ?? () from /usr/lib/R/lib/libR.so
#15 0x00007fbd0cb6aa88 in Rf_eval () from /usr/lib/R/lib/libR.so
#16 0x00007fbd0cb6b3b9 in ?? () from /usr/lib/R/lib/libR.so
#17 0x00007fbd0cb6b878 in ?? () from /usr/lib/R/lib/libR.so
#18 0x00007fbd0cb6132d in ?? () from /usr/lib/R/lib/libR.so
#19 0x00007fbd0cb6aa88 in Rf_eval () from /usr/lib/R/lib/libR.so
#20 0x00007fbd0cb6b3b9 in ?? () from /usr/lib/R/lib/libR.so
#21 0x00007fbd0cb6b878 in ?? () from /usr/lib/R/lib/libR.so
#22 0x00007fbd0cb6132d in ?? () from /usr/lib/R/lib/libR.so
#23 0x00007fbd0cb6aa88 in Rf_eval () from /usr/lib/R/lib/libR.so
#24 0x00007fbd0cb6ceaf in ?? () from /usr/lib/R/lib/libR.so
#25 0x00007fbd0cb623c0 in ?? () from /usr/lib/R/lib/libR.so
#26 0x00007fbd0cb6aa88 in Rf_eval () from /usr/lib/R/lib/libR.so
#27 0x00007fbd0cb6ceaf in ?? () from /usr/lib/R/lib/libR.so
#28 0x00007fbd0cb623c0 in ?? () from /usr/lib/R/lib/libR.so
#29 0x00007fbd0cb6aa88 in Rf_eval () from /usr/lib/R/lib/libR.so
#30 0x00007fbd0cb6ceaf in ?? () from /usr/lib/R/lib/libR.so
#31 0x00007fbd0cb623c0 in ?? () from /usr/lib/R/lib/libR.so
#32 0x00007fbd0cb6aa88 in Rf_eval () from /usr/lib/R/lib/libR.so
#33 0x00007fbd0cb6ceaf in ?? () from /usr/lib/R/lib/libR.so
#34 0x00007fbd0cb623c0 in ?? () from /usr/lib/R/lib/libR.so
#35 0x00007fbd0cb6aa88 in Rf_eval () from /usr/lib/R/lib/libR.so
#36 0x00007fbd0cb6ceaf in ?? () from /usr/lib/R/lib/libR.so
#37 0x00007fbd0cb6ac56 in Rf_eval () from /usr/lib/R/lib/libR.so
#38 0x00007fbd0cb1a58e in ?? () from /usr/lib/R/lib/libR.so
---Type <return> to continue, or q <return> to quit---
#39 0x00007fbd0cb1bac1 in R_ToplevelExec () from /usr/lib/R/lib/libR.so
#40 0x00007fbd0cb1bb09 in R_tryEval () from /usr/lib/R/lib/libR.so
#41 0x0000000000de4189 in rstudio::r::exec::(anonymous namespace)::evaluateExpressionsUnsafe(SEXPREC*, SEXPREC*, SEXPREC**, rstudio::r::sexp::Protect*, rstudio::r::exec::(anonymous namespace)::EvalType) [clone .constprop.57] ()
#42 0x0000000000de5d55 in rstudio::r::exec::evaluateString(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, SEXPREC**, rstudio::r::sexp::Protect*) ()
#43 0x000000000070c85f in rstudio::session::modules::rparser::(anonymous namespace)::resolveObjectAssociatedWithCall(rstudio::core::r_util::token_cursor::RTokenCursor, rstudio::r::sexp::Protect*, bool, bool*) [clone .constprop.1377] ()
#44 0x000000000070e3f7 in rstudio::session::modules::rparser::(anonymous namespace)::mightPerformNonstandardEvaluation(rstudio::core::r_util::token_cursor::RTokenCursor const&, rstudio::session::modules::rparser::ParseStatus&) ()
#45 0x0000000000997dd2 in rstudio::session::modules::rparser::doParse(rstudio::core::r_util::token_cursor::RTokenCursor&, rstudio::session::modules::rparser::ParseStatus&) ()
#46 0x000000000099a320 in rstudio::session::modules::rparser::parse(rstudio::core::FilePath const&, std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > const&, rstudio::session::modules::rparser::ParseOptions const&) ()
#47 0x00000000008a9e65 in rstudio::session::modules::diagnostics::parse(std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > const&, rstudio::core::FilePath const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool) ()
#48 0x00000000008adf66 in rstudio::session::modules::diagnostics::(anonymous namespace)::lintRSourceDocument(rstudio::core::json::JsonRpcRequest const&, rstudio::core::json::JsonRpcResponse*) ()
#49 0x0000000000783a0f in rstudio_boost::detail::function::function_invoker2<rstudio::core::Error (*)(rstudio::core::json::JsonRpcRequest const&, rstudio::core::json::JsonRpcResponse*), rstudio::core::Error, rstudio::core::json::JsonRpcRequest const&, rstudio::core::json::JsonRpcResponse*>::invoke(rstudio_boost::detail::function::function_buffer&, rstudio::core::json::JsonRpcRequest const&, rstudio::core::json::JsonRpcResponse*) ()
#50 0x0000000000c5f898 in rstudio::core::json::(anonymous namespace)::runSynchronousFunction(rstudio_boost::function<rstudio::core::Error (rstudio::core::json::JsonRpcRequest const&, rstudio::core::json::JsonRpcResponse*)> const&, rstudio::core::json::JsonRpcRequest const&, rstudio_boost::function<void (rstudio::core::Error const&, rstudio::core::json::JsonRpcResponse*)> const&) ()
#51 0x00000000007e46f9 in rstudio::session::rpc::handleRpcRequest(rstudio::core::json::JsonRpcRequest const&, rstudio_boost::shared_ptr<rstudio::session::HttpConnection>, rstudio::session::http_methods::ConnectionType) ()
#52 0x00000000007e99bb in rstudio::session::http_methods::handleConnection(rstudio_boost::shared_ptr<rstudio::session::HttpConnection>, rstudio::session::http_methods::ConnectionType) ()
#53 0x00000000007ebc8b in rstudio::session::http_methods::waitForMethod(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, rstudio_boost::function<void ()> const&, rstudio_boost::function<bool ()> const&, rstudio::core::json::JsonRpcRequest*) ()
#54 0x0000000000754b13 in rstudio::session::console_input::rConsoleRead(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, rstudio::r::session::RConsoleInput*) ()
#55 0x0000000000e22cba in rstudio::r::session::RReadConsole(char const*, unsigned char*, int, int) ()
#56 0x00007fbd0cb9431c in Rf_ReplIteration () from /usr/lib/R/lib/libR.so
---Type <return> to continue, or q <return> to quit---
#57 0x00007fbd0cb94811 in ?? () from /usr/lib/R/lib/libR.so
#58 0x00007fbd0cb948c8 in run_Rmainloop () from /usr/lib/R/lib/libR.so
#59 0x0000000000e4098f in rstudio::r::session::runEmbeddedR(rstudio::core::FilePath const&, rstudio::core::FilePath const&, bool, bool, SA_TYPE, rstudio::r::session::Callbacks const&, rstudio::r::session::InternalCallbacks*) ()
#60 0x0000000000e1ef3f in rstudio::r::session::run(rstudio::r::session::ROptions const&, rstudio::r::session::RCallbacks const&) ()
#61 0x0000000000718a83 in main ()
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R version 3.4.2 (2017-09-28)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.3 LTS
Matrix products: default
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machine login
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platform x86_64-pc-linux-gnu
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system x86_64, linux-gnu
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month 09
day 28
svn rev 73368
language R
version.string R version 3.4.2 (2017-09-28)
nickname Short Summer
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Log file: rdesktop.log
--------------------------------------------------
(Empty)
Log file: rsession-reilly.log
--------------------------------------------------
13 Oct 2017 21:15:06 [rsession-reilly] WARNING Process supervisor did not terminate within 1 second; LOGGED FROM: void {anonymous}::rCleanup(bool) /home/ubuntu/rstudio/src/cpp/session/SessionMain.cpp:1099
当这段代码保存到文档中时，打开并编辑文件后，rsession会挂起。如果这段代码不存在，文档工作正常。不完全确定发生了什么。这段代码只是我正在处理的一个未完成的功能，但不知何故它正在炸毁Rstudio。
iteratively_impute_pca_zscore_remove_outliers <- function(matrix, ... ) {
repeat {
imputed.mat <- impute_less_than_x_NA(matrix)
pc1_score_
if (length(SamplesToRemove)==0)
}
}
repeat {
} (length(samplesToRemove)==0){
}
答案 0 :(得分：1)
喝！感谢您报告此事并通过评论讨论该问题。这里的问题是这段代码：
repeat {
} (length(samplesToRemove)==0){
}
问题是，对于RStudio的诊断系统，这看起来像一个函数调用（！），其中repeat {}是要调用的函数的左侧。当RStudio尝试评估此函数时，它会卡在repeat {}循环中，永远不会有机会逃脱。
您应该可以通过将此位移到单独的行来解决此问题：
repeat {
}
(length(samplesToRemove)==0){
}
但我会为RStudio人员提交此文件，我们会尝试修复。