[llvm-dev] Crash in SmallVector with latest MSVC 2019 (debug mode)

[De Azevedo Piovezan, Felipe via llvm-dev]

> The crash occurs only with clang compile in debug mode.

Sanity check: you're not mixing clang in debug mode with LLVM in release mode, right?
I've seen similar crashes in DenseMap when I *accidentally* did the above.
________________________________
From: llvm-dev <llvm-dev-bounces at lists.llvm.org> on behalf of Francois Pichet via llvm-dev <llvm-dev at lists.llvm.org>
Sent: Wednesday, January 22, 2020 1:00 PM
To: llvm-dev at lists.llvm.org <llvm-dev at lists.llvm.org>
Subject: [llvm-dev] Crash in SmallVector with latest MSVC 2019 (debug mode)

Is anybody using the LLVM/clang/lldb compiled with the MSVC 2019 (x86-32bit) successfully?
I am getting crash in SmallVector at multiple places after a llvm:SmallVector is being moved around in move constructor or move operator=.
 Not sure what is going on.

  ~SmallVectorImpl() {
    if (!this->isSmall())
      free(this->begin());  // <=== crash here, line 336 SmallVector.h
  }

The crash occurs only with clang compile in debug mode. Release mode is fine.

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