[Webkit-unassigned] [Bug 197911] New: compilation failure with clang 9

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=197911

            Bug ID: 197911
           Summary: compilation failure with clang 9
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Template Framework
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: vjaquez at igalia.com

While compiling webkit's master with clang, either 6 or 9 I got this error

[3/864] Building CXX object Source/WTF/wtf/CMakeFiles/WTF.dir/MetaAllocator.cpp.o
FAILED: Source/WTF/wtf/CMakeFiles/WTF.dir/MetaAllocator.cpp.o 
/usr/bin/clang++-9  -DBUILDING_GTK__=1 -DBUILDING_WITH_CMAKE=1 -DBUILDING_WTF -DBWRAP_EXECUTABLE=\"/usr/bin/bwrap\" -DDBUS_PROXY_EXECUTABLE=\"/usr/bin/xdg-dbus-proxy\" -DGETTEXT_PACKAGE=\"WebKit2GTK-4.0\" -DHAVE_CONFIG_H=1 -DJSC_GLIB_API_ENABLED -DWEBKITGTK_API_VERSION_STRING=\"4.0\" -I/opt/webkit/WebKit/Source/bmalloc -I. -IDerivedSources -I/opt/webkit/WebKit/Source/ThirdParty -IDerivedSources/WTF -I/opt/webkit/WebKit/Source/WTF -I/opt/webkit/WebKit/Source/WTF/wtf -I/opt/webkit/WebKit/Source/WTF/wtf/dtoa -I/opt/webkit/WebKit/Source/WTF/wtf/persistence -I/opt/webkit/WebKit/Source/WTF/wtf/text -I/opt/webkit/WebKit/Source/WTF/wtf/text/icu -I/opt/webkit/WebKit/Source/WTF/wtf/threads -I/opt/webkit/WebKit/Source/WTF/wtf/unicode -isystem /usr/include/gio-unix-2.0 -isystem /usr/include/libmount -isystem /usr/include/blkid -isystem /usr/include/uuid -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -fdiagnostics-color=always -fcolor-diagnostics -Wextra -Wall -Wno-parentheses-equality -Wno-noexcept-type -Qunused-arguments -Wwrite-strings -Wundef -Wpointer-arith -Wmissing-format-attribute -Wformat-security -Wcast-align -ggdb -std=c++17 -fno-strict-aliasing -fno-exceptions -fno-rtti -std=c++17 -gsplit-dwarf -g -fPIC -MD -MT Source/WTF/wtf/CMakeFiles/WTF.dir/MetaAllocator.cpp.o -MF Source/WTF/wtf/CMakeFiles/WTF.dir/MetaAllocator.cpp.o.d -o Source/WTF/wtf/CMakeFiles/WTF.dir/MetaAllocator.cpp.o -c /opt/webkit/WebKit/Source/WTF/wtf/MetaAllocator.cpp
In file included from /opt/webkit/WebKit/Source/WTF/wtf/MetaAllocator.cpp:30:
In file included from /opt/webkit/WebKit/Source/WTF/wtf/MetaAllocator.h:34:
In file included from /opt/webkit/WebKit/Source/WTF/wtf/MetaAllocatorHandle.h:32:
In file included from /opt/webkit/WebKit/Source/WTF/wtf/MetaAllocatorPtr.h:29:
/opt/webkit/WebKit/Source/WTF/wtf/PtrTag.h:431:23: error: use of undeclared identifier 'nullptr_t'; did you mean 'nullptr'?
inline T* tagArrayPtr(nullptr_t, size_t size)
                      ^~~~~~~~~
                      nullptr
/opt/webkit/WebKit/Source/WTF/wtf/PtrTag.h:431:34: error: unexpected type name 'size_t': expected expression
inline T* tagArrayPtr(nullptr_t, size_t size)
                                 ^
/opt/webkit/WebKit/Source/WTF/wtf/PtrTag.h:431:46: error: expected ';' at end of declaration
inline T* tagArrayPtr(nullptr_t, size_t size)
                                             ^
                                             ;
/opt/webkit/WebKit/Source/WTF/wtf/PtrTag.h:432:1: error: expected unqualified-id
{
^
/opt/webkit/WebKit/Source/WTF/wtf/PtrTag.h:438:11: error: redefinition of 'tagArrayPtr' as different kind of symbol
inline T* tagArrayPtr(T* ptr, size_t)
          ^
/opt/webkit/WebKit/Source/WTF/wtf/PtrTag.h:431:11: note: previous definition is here
inline T* tagArrayPtr(nullptr_t, size_t size)
          ^
5 errors generated.

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