[all-commits] [llvm/llvm-project] dbf3ca: [clangd] check for synthesized symbols when tracki...

[Matheus Izvekov via All-commits]

  Branch: refs/heads/users/mizvekov/bug/clangd-msvc-assert-crash-fix
  Home:   https://github.com/llvm/llvm-project
  Commit: dbf3ca258b70aa591f14300ba18dcc6b8d35de40
      https://github.com/llvm/llvm-project/commit/dbf3ca258b70aa591f14300ba18dcc6b8d35de40
  Author: Matheus Izvekov <mizvekov at gmail.com>
  Date:   2023-12-11 (Mon, 11 Dec 2023)

  Changed paths:
    M clang-tools-extra/clangd/index/SymbolCollector.cpp
    M clang-tools-extra/clangd/test/GH75115.test

  Log Message:
  -----------
  [clangd] check for synthesized symbols when tracking include locations

This fixes https://github.com/llvm/llvm-project/issues/75115

In C mode with MSVC compatibility, when the `assert` macro is defined,
as a workaround, `static_assert` is implicitly defined as well,
if not already so, in order to work around a broken `assert.h`
implementation.
This workaround was implemented in https://github.com/llvm/llvm-project/commit/8da090381d567d0ec555840f6b2a651d2997e4b3

A synthesized symbol does not occur in source code, and therefore
should not have valid source location, but this was not checked when
inserting this into a map symbol -> include file map.

The invalid FileID value is used for empty key representation in
the include file map hash table, and it's not valid to insert it,
causing the crash.