Opening DevTools causes "Out of memory" error in 0.27.0

[bengotow]

This crash is a significant breaker for us—I've attached a crash log below. Here are the steps to reproduce:

1. Download Electron 0.27.0 on a Mac running Mac OS X 10.10.
2. Run it without specifying an application so that it opens the default_app bundled with Electron.
   (for me, just running ./Electron.app/Contents/MacOS/Electron on the command line)
3. Press command-option-I to open the Chromium Developer Tools. Open and close them several times. Electron should crash with the exception below.

If Electron doesn't crash, try toggling between the popped-out and docked modes for the developer tools (option in the top right of the developer panel). That seems to trigger it for me.

Electron(81201,0x7fff749be300) malloc: *** mach_vm_map(size=5764616290198818816) failed (error code=3)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
[81201:0527/112125:FATAL:memory.cc(18)] Out of memory. size=5764616290198815232
Trace/BPT trap: 5

With lldb:

(lldb) target create "./electron/Electron.app/Contents/MacOS/Electron"
Current executable set to './electron/Electron.app/Contents/MacOS/Electron' (x86_64).
(lldb) br set --name malloc_error_break
Breakpoint 1: where = libsystem_malloc.dylib`malloc_error_break, address = 0x000000000001319f
(lldb) continue
error: invalid process
(lldb) process launch
Process 81276 launched: './electron/Electron.app/Contents/MacOS/Electron' (x86_64)
[81283:0527/112509:INFO:renderer_main.cc(200)] Renderer process started
Electron(81276,0x7fff749be300) malloc: *** mach_vm_map(size=562950235492352) failed (error code=3)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
Process 81276 stopped
* thread #1: tid = 0x206048, 0x00007fff85e3619f libsystem_malloc.dylib`malloc_error_break, name = 'CrBrowserMain', queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
    frame #0: 0x00007fff85e3619f libsystem_malloc.dylib`malloc_error_break
libsystem_malloc.dylib`malloc_error_break:
->  0x7fff85e3619f <+0>: pushq  %rbp
    0x7fff85e361a0 <+1>: movq   %rsp, %rbp
    0x7fff85e361a3 <+4>: nop    
    0x7fff85e361a4 <+5>: nopl   (%rax)
(lldb) bt
* thread #1: tid = 0x206048, 0x00007fff85e3619f libsystem_malloc.dylib`malloc_error_break, name = 'CrBrowserMain', queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
  * frame #0: 0x00007fff85e3619f libsystem_malloc.dylib`malloc_error_break
    frame #1: 0x00007fff85e32d2b libsystem_malloc.dylib`szone_error + 406
    frame #2: 0x00007fff85e25048 libsystem_malloc.dylib`allocate_pages + 371
    frame #3: 0x00007fff85e2801f libsystem_malloc.dylib`large_malloc + 1042
    frame #4: 0x00007fff85e263a5 libsystem_malloc.dylib`szone_malloc_should_clear + 1426
    frame #5: 0x0000000100145e00 Electron Framework`___lldb_unnamed_function4040$$Electron Framework + 16
    frame #6: 0x00007fff85e25877 libsystem_malloc.dylib`malloc_zone_malloc + 71
    frame #7: 0x00007fff85e24395 libsystem_malloc.dylib`malloc + 42
    frame #8: 0x00007fff901c043e libc++.1.dylib`operator new(unsigned long) + 30
    frame #9: 0x00007fff901c3f93 libc++.1.dylib`std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__grow_by(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) + 139
    frame #10: 0x0000000101133915 Electron Framework`___lldb_unnamed_function89566$$Electron Framework + 101
    frame #11: 0x000000010112bcde Electron Framework`___lldb_unnamed_function89488$$Electron Framework + 158
    frame #12: 0x0000000100030aa6 Electron Framework`atom::api::WebContents::DidGetResourceResponseStart(content::ResourceRequestDetails const&) + 294
    frame #13: 0x0000000100030b7d Electron Framework`non-virtual thunk to atom::api::WebContents::DidGetResourceResponseStart(content::ResourceRequestDetails const&) + 13
    frame #14: 0x000000010083acf6 Electron Framework`___lldb_unnamed_function38702$$Electron Framework + 342
    frame #15: 0x00000001006f3574 Electron Framework`___lldb_unnamed_function31938$$Electron Framework + 132
    frame #16: 0x000000010011c6c8 Electron Framework`___lldb_unnamed_function3014$$Electron Framework + 248
    frame #17: 0x00000001001386cf Electron Framework`___lldb_unnamed_function3701$$Electron Framework + 415
    frame #18: 0x0000000100138ab6 Electron Framework`___lldb_unnamed_function3704$$Electron Framework + 438
    frame #19: 0x00000001001154d1 Electron Framework`___lldb_unnamed_function2842$$Electron Framework + 49
    frame #20: 0x00007fff827e3a01 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    frame #21: 0x00007fff827d5b8d CoreFoundation`__CFRunLoopDoSources0 + 269
    frame #22: 0x00007fff827d51bf CoreFoundation`__CFRunLoopRun + 927
    frame #23: 0x00007fff827d4bd8 CoreFoundation`CFRunLoopRunSpecific + 296
    frame #24: 0x00007fff8d99d56f HIToolbox`RunCurrentEventLoopInMode + 235
    frame #25: 0x00007fff8d99d2ea HIToolbox`ReceiveNextEventCommon + 431
    frame #26: 0x00007fff8d99d12b HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 71
    frame #27: 0x00007fff8a3069bb AppKit`_DPSNextEvent + 978
    frame #28: 0x00007fff8a305f68 AppKit`-[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 346
    frame #29: 0x00007fff8a2fbbf3 AppKit`-[NSApplication run] + 594
    frame #30: 0x0000000100115b61 Electron Framework`___lldb_unnamed_function2862$$Electron Framework + 321
    frame #31: 0x000000010011533c Electron Framework`___lldb_unnamed_function2838$$Electron Framework + 92
    frame #32: 0x0000000100146e73 Electron Framework`___lldb_unnamed_function4104$$Electron Framework + 99
    frame #33: 0x00000001005b4311 Electron Framework`___lldb_unnamed_function25737$$Electron Framework + 113
    frame #34: 0x00000001005b4275 Electron Framework`___lldb_unnamed_function25736$$Electron Framework + 69
    frame #35: 0x00000001005b6872 Electron Framework`___lldb_unnamed_function25777$$Electron Framework + 18
    frame #36: 0x00000001005b097f Electron Framework`___lldb_unnamed_function25720$$Electron Framework + 159
    frame #37: 0x000000010054fe92 Electron Framework`___lldb_unnamed_function23922$$Electron Framework + 114
    frame #38: 0x000000010054f536 Electron Framework`___lldb_unnamed_function23915$$Electron Framework + 54
    frame #39: 0x0000000100004b0d Electron Framework`AtomMain + 77
    frame #40: 0x0000000100000eea Electron`main + 58
    frame #41: 0x00007fff8c8675c9 libdyld.dylib`start + 1
(lldb)