Bug 234994 – Null pointer crash when calling into `-[WebView close]` in `-webView:didCommitLoadForFrame:`

• Component: WebKit Misc.
• Status: RESOLVED FIXED

[Wenson Hsieh]

rdar://86845512

[Wenson Hsieh]

Created attachment 448645 [details]
For EWS

[Geoffrey Garen]

LGTM

[Wenson Hsieh]

(In reply to Geoffrey Garen from comment #2)
> LGTM

Thanks for taking a look!

(I held off on adding the r? because I wasn't sure if there were going to be more unified-source-related build failures on iOS, but it seems like EWS is happy now :P)

[Chris Dumez]

Comment on attachment 448645 [details]
For EWS

r=me

[Wenson Hsieh]

(In reply to Chris Dumez from comment #4)
> Comment on attachment 448645 [details]
> For EWS
> 
> r=me

Thanks for the reviews!

It looks like my new test is crashing on iOS — upon closer investigation though, it seems that it's just crashing on initialization of the WebView:

```
Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   JavaScriptCore                	       0x10b654d53 WTFCrashWithInfo(int, char const*, char const*, int) + 19 (Assertions.h:732)
1   JavaScriptCore                	       0x10b310503 JSC::(anonymous namespace)::sizeClasses() + 58 (MarkedSpace.cpp:138) [inlined]
2   JavaScriptCore                	       0x10b310503 void JSC::(anonymous namespace)::buildSizeClassTable<std::__1::array<unsigned int, 503ul>, JSC::MarkedSpace::initializeSizeClassForStepSize()::$_5::operator()() const::'lambda'(unsigned long), JSC::MarkedSpace::initializeSizeClassForStepSize()::$_5::operator()() const::'lambda0'(unsigned long)>(std::__1::array<unsigned int, 503ul>&, JSC::MarkedSpace::initializeSizeClassForStepSize()::$_5::operator()() const::'lambda'(unsigned long) const&, JSC::MarkedSpace::initializeSizeClassForStepSize()::$_5::operator()() const::'lambda0'(unsigned long) const&) + 58 (MarkedSpace.cpp:147) [inlined]
```

Taking a look at similar legacy WK1 API tests that use WebView, it seems they're all macOS-specific, so  it seems WK1's WebView just wasn't intended to be used in this way on iOS. I'll move the new test to `Tests/mac` before landing (and remove some of the unified source related fixes that are no longer needed).

[Wenson Hsieh]

Created attachment 448680 [details]
For EWS

[EWS]

Committed r287814 (245866@main): <https://commits.webkit.org/245866@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 448680 [details].

[Radar WebKit Bug Importer]

<rdar://problem/87298510>