[Webkit-unassigned] [Bug 224826] New: Static asserts in WasmAirIRGenerator.cpp and WasmB3IRGenerator.cpp trigger -Wnonnull warnings with GCC 11

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=224826

            Bug ID: 224826
           Summary: Static asserts in WasmAirIRGenerator.cpp and
                    WasmB3IRGenerator.cpp trigger -Wnonnull warnings with
                    GCC 11
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at gnome.org

These asserts are understandably triggering -Wnonnull warnings:

static_assert(sizeof(decltype(static_cast<Instance*>(nullptr)->cachedStackLimit())) == sizeof(uint64_t), "");

In https://bugs.webkit.org/show_bug.cgi?id=224452#c26, Jonathan Wakely has a tip to rewrite the assert:

static_assert(sizeof(std::declval<Instance*>()->cachedStackLimit()) == sizeof(uint64_t), "");

It works.

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