[Webkit-unassigned] [Bug 239339] New: -Wdangling-pointer warning when building ANGLE with GCC 12

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=239339

            Bug ID: 239339
           Summary: -Wdangling-pointer warning when building ANGLE with
                    GCC 12
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: ANGLE
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at gnome.org
                CC: dino at apple.com, kbr at google.com, kkinnunen at apple.com

This is probably a false-positive. I'm a little tempted to build ANGLE with -w since it is third-party code and doesn't make a ton of sense for us to be responsible for their build warnings, but for now we just have a steadily-increasing list of warnings to suppress when building ANGLE.

[1645/6690] Building CXX object Source/ThirdParty/ANGLE/CM....dir/src/compiler/translator/tree_util/IntermRebuild.cpp.o
/home/mcatanzaro/Projects/WebKit/Source/ThirdParty/ANGLE/src/compiler/translator/tree_util/IntermRebuild.cpp: In member function ‘sh::PostResult sh::TIntermRebuild::traversePost(sh::NodeType, const sh::TIntermNode&, sh::TIntermNode&, VisitBits)’:
/home/mcatanzaro/Projects/WebKit/Source/ThirdParty/ANGLE/src/compiler/translator/tree_util/IntermRebuild.cpp:482:16: warning: storing the address of local variable ‘guard’ in ‘*this.sh::TIntermRebuild::mNodeStack.sh::TIntermRebuild::ConsList<sh::TIntermNode*>::tail’ [-Wdangling-pointer=]
  482 |     mNodeStack = {&currNode, &guard.oldNodeStack};
      |     ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/mcatanzaro/Projects/WebKit/Source/ThirdParty/ANGLE/src/compiler/translator/tree_util/IntermRebuild.cpp:481:20: note: ‘guard’ declared here
  481 |     NodeStackGuard guard(mNodeStack);
      |                    ^~~~~
/home/mcatanzaro/Projects/WebKit/Source/ThirdParty/ANGLE/src/compiler/translator/tree_util/IntermRebuild.cpp:481:20: note: ‘<unknown>’ declared here
/home/mcatanzaro/Projects/WebKit/Source/ThirdParty/ANGLE/src/compiler/translator/tree_util/IntermRebuild.cpp: In function ‘sh::TIntermNode* sh::TIntermRebuild::traverseChildren(sh::NodeType, const sh::TIntermNode&, sh::TIntermNode&, VisitBits)’:
/home/mcatanzaro/Projects/WebKit/Source/ThirdParty/ANGLE/src/compiler/translator/tree_util/IntermRebuild.cpp:411:16: warning: storing the address of local variable ‘guard’ in ‘*this.sh::TIntermRebuild::mNodeStack.sh::TIntermRebuild::ConsList<sh::TIntermNode*>::tail’ [-Wdangling-pointer=]
  411 |     mNodeStack = {&currNode, &guard.oldNodeStack};
      |     ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/mcatanzaro/Projects/WebKit/Source/ThirdParty/ANGLE/src/compiler/translator/tree_util/IntermRebuild.cpp:410:20: note: ‘guard’ declared here
  410 |     NodeStackGuard guard(mNodeStack);
      |                    ^~~~~
/home/mcatanzaro/Projects/WebKit/Source/ThirdParty/ANGLE/src/compiler/translator/tree_util/IntermRebuild.cpp:410:20: note: ‘<unknown>’ declared here

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