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[SR-9914] LLDB REPL autocomplete cast assertion failure #4342

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marcrasi mannequin opened this issue Feb 13, 2019 · 9 comments
Closed

[SR-9914] LLDB REPL autocomplete cast assertion failure #4342

marcrasi mannequin opened this issue Feb 13, 2019 · 9 comments
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bug Something isn't working LLDB for Swift

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@marcrasi
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Mannequin

marcrasi mannequin commented Feb 13, 2019

Previous ID SR-9914
Radar None
Original Reporter @marcrasi
Type Bug
Status Resolved
Resolution Done
Additional Detail from JIRA
Votes 0
Component/s LLDB for Swift
Labels Bug
Assignee None
Priority Medium

md5: f317b009ecfa0fd922e0d73cb880a979

Issue Description:

I'm using the Feb 3, 2019 Ubuntu 18.04 Trunk Development Snapshot (https://swift.org/builds/development/ubuntu1804/swift-DEVELOPMENT-SNAPSHOT-2019-02-03-a/swift-DEVELOPMENT-SNAPSHOT-2019-02-03-a-ubuntu18.04.tar.gz).

If I start up the LLDB REPL and type `pri<TAB>`, I get:

lldb: /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-18_04/llvm/include/llvm/Support/Casting.h:255: typename cast_retty<X, Y *>::ret_type llvm::cast(Y *) [X = swift::SourceFile, Y = swift::FileUnit]: Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
#&#8203;0 0x0000000000415464 PrintStackTraceSignalHandler(void*) (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/lldb+0x415464)
#&#8203;1 0x00000000004135dc llvm::sys::RunSignalHandlers() (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/lldb+0x4135dc)
#&#8203;2 0x0000000000415672 SignalHandler(int) (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/lldb+0x415672)
#&#8203;3 0x00007f42e93710c0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x110c0)
#&#8203;4 0x00007f42e0f2bfcf gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x32fcf)
#&#8203;5 0x00007f42e0f2d3fa abort (/lib/x86_64-linux-gnu/libc.so.6+0x343fa)
#&#8203;6 0x00007f42e0f24e37 (/lib/x86_64-linux-gnu/libc.so.6+0x2be37)
#&#8203;7 0x00007f42e0f24ee2 (/lib/x86_64-linux-gnu/libc.so.6+0x2bee2)
#&#8203;8 0x00007f42e2eba4a6 lldb_private::SwiftREPL::CompleteCode(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, lldb_private::StringList&) (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/../lib/liblldb.so.7+0xb314a6)
#&#8203;9 0x00007f42e2c3d594 lldb_private::REPL::IOHandlerComplete(lldb_private::IOHandler&, char const*, char const*, char const*, int, int, lldb_private::StringList&) (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/../lib/liblldb.so.7+0x8b4594)
#&#8203;10 0x00007f42e2ba6fd1 lldb_private::IOHandlerEditline::AutoCompleteCallback(char const*, char const*, char const*, int, int, lldb_private::StringList&, void*) (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/../lib/liblldb.so.7+0x81dfd1)
#&#8203;11 0x00007f42e2c4b75b lldb_private::Editline::TabCommand(int) (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/../lib/liblldb.so.7+0x8c275b)
#&#8203;12 0x00007f42e2c4d869 lldb_private::Editline::ConfigureEditor(bool)::$_13::__invoke(editline*, int) (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/../lib/liblldb.so.7+0x8c4869)
#&#8203;13 0x00007f42e0aca7e7 el_wgets (/usr/lib/x86_64-linux-gnu/libedit.so.2+0x107e7)
#&#8203;14 0x00007f42e0ac5da3 el_gets (/usr/lib/x86_64-linux-gnu/libedit.so.2+0xbda3)
#&#8203;15 0x00007f42e2c4d28d lldb_private::Editline::GetLines(int, lldb_private::StringList&, bool&) (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/../lib/liblldb.so.7+0x8c428d)
#&#8203;16 0x00007f42e2ba77f4 lldb_private::IOHandlerEditline::Run() (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/../lib/liblldb.so.7+0x81e7f4)
#&#8203;17 0x00007f42e2b8ab06 lldb_private::Debugger::ExecuteIOHandlers() (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/../lib/liblldb.so.7+0x801b06)
#&#8203;18 0x00007f42e2b8ec6f lldb_private::Debugger::IOHandlerThread(void*) (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/../lib/liblldb.so.7+0x805c6f)
#&#8203;19 0x00007f42e2c553ec lldb_private::HostNativeThreadBase::ThreadCreateTrampoline(void*) (/usr/local/google/home/marcrasi/Downloads/swift-toolchains/head-nightly-2019-02-03/usr/bin/../lib/liblldb.so.7+0x8cc3ec)
#&#8203;20 0x00007f42e9367494 start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x7494)
#&#8203;21 0x00007f42e0fe1a8f clone (/lib/x86_64-linux-gnu/libc.so.6+0xe8a8f)
Aborted

As far as I can tell, the text that you are trying to complete doesn't matter. It always gives you the same assertion failure.
@belkadan
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! jingham@apple.com (JIRA User), @dcci, have we seen this yet?

@dcci
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Mannequin

dcci mannequin commented Feb 13, 2019

@belkadan I haven't seen this one.@marcrasi do you happen to know whether this is Linux specific or also reproduces on MacOS?

@marcrasi
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marcrasi mannequin commented Feb 13, 2019

I just tested it out with the MacOS 2/3/19 development toolchain, and I can also reproduce it there.

@swift-ci
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Comment by Jim Ingham (JIRA)

Same operation does not crash on the swift-5.0-branch.

  1> pri
Available completions:
print(items: Any...) -> Void
print(items: Any..., separator: String, terminator: String) -> Void
print(items: Any..., separator: String, terminator: String, to: &TextOutputStream) -> Void
print(items: Any..., to: &TextOutputStream) -> Void
private
  1>

@dcci
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Mannequin

dcci mannequin commented Feb 15, 2019

This is the new DWARFImporter. If I disable it, the crash goes away.
cc: @adrian-prantl

@adrian-prantl
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The quick workaround is to disable the DWARFImporter in the REPL. The better fix is to not have the DWARFImporter claim that it can load a module for which no DWARF exists. I'll take a look at that.

@dcci
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dcci mannequin commented Feb 15, 2019

I have a patch coming for you.

@dcci
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dcci mannequin commented Feb 15, 2019

Proposed: apple/swift-lldb#1299

@dcci
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dcci mannequin commented Feb 15, 2019

Merged. Let me know if there are other issues.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 5, 2022
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