The [three crashes I see now](https://crash-stats.mozilla.org/signature/?signature=PR_MD_LSEEK64%20%7C%20FileAvailable64&date=%3E%3D2020-08-25T09%3A57%3A00.000Z&date=%3C2020-09-01T09%3A57%3A00.000Z&_columns=date&_columns=product&_columns=version&_columns=build_id&_columns=platform&_columns=reason&_columns=address&_columns=install_time&_columns=startup_crash&_sort=-date&page=1#reports) point to [nsZipHandle::Init](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/modules/libjar/nsZipArchive.cpp#190). This could happen, if `OpenNSPRFileDesc` returned NS_OK but did not create a valid FD for some reason. There seems to be the theoretic possibility that [ConvertWinError](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/xpcom/io/nsLocalFileWin.cpp#286-288) returns NS_OK, though it sounds unlikely that [`GetLastError`](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/xpcom/io/nsLocalFileWin.cpp#417) did return `0`. But a `ConvertWinError`function that may return NS_OK seems odd.
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The [three crashes I see now](https://crash-stats.mozilla.org/signature/?signature=PR_MD_LSEEK64%20%7C%20FileAvailable64&date=%3E%3D2020-08-25T09%3A57%3A00.000Z&date=%3C2020-09-01T09%3A57%3A00.000Z&_columns=date&_columns=product&_columns=version&_columns=build_id&_columns=platform&_columns=reason&_columns=address&_columns=install_time&_columns=startup_crash&_sort=-date&page=1#reports) point to [nsZipHandle::Init](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/modules/libjar/nsZipArchive.cpp#190). This could happen, if `OpenNSPRFileDesc` returned NS_OK but did not create a valid FD for some reason. There seems to be the theoretical possibility that [ConvertWinError](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/xpcom/io/nsLocalFileWin.cpp#286-288) returns NS_OK, though it sounds unlikely that [`GetLastError`](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/xpcom/io/nsLocalFileWin.cpp#417) did return `0`. But a `ConvertWinError`function that may return NS_OK seems odd.
The [three crashes I see now](https://crash-stats.mozilla.org/signature/?signature=PR_MD_LSEEK64%20%7C%20FileAvailable64&date=%3E%3D2020-08-25T09%3A57%3A00.000Z&date=%3C2020-09-01T09%3A57%3A00.000Z&_columns=date&_columns=product&_columns=version&_columns=build_id&_columns=platform&_columns=reason&_columns=address&_columns=install_time&_columns=startup_crash&_sort=-date&page=1#reports) point to [nsZipHandle::Init](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/modules/libjar/nsZipArchive.cpp#190). This could happen, if `OpenNSPRFileDesc` returned NS_OK but did not create a valid FD for some reason. There seems to be the theoretical possibility that [ConvertWinError](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/xpcom/io/nsLocalFileWin.cpp#286-288) returns NS_OK, though it sounds unlikely that [`GetLastError`](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/xpcom/io/nsLocalFileWin.cpp#417) did return `0`. But a `ConvertWinError`function that may return NS_OK seems odd. This are start-up crashes on the main thread opening omni.ja, it seems.
The [three crashes I see now](https://crash-stats.mozilla.org/signature/?signature=PR_MD_LSEEK64%20%7C%20FileAvailable64&date=%3E%3D2020-08-25T09%3A57%3A00.000Z&date=%3C2020-09-01T09%3A57%3A00.000Z&_columns=date&_columns=product&_columns=version&_columns=build_id&_columns=platform&_columns=reason&_columns=address&_columns=install_time&_columns=startup_crash&_sort=-date&page=1#reports) point to [nsZipHandle::Init](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/modules/libjar/nsZipArchive.cpp#190). This could happen, if `OpenNSPRFileDesc` returned NS_OK but did not create a valid FD for some reason. There seems to be the theoretical possibility that [ConvertWinError](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/xpcom/io/nsLocalFileWin.cpp#286-288) returns NS_OK, though it sounds unlikely that [`GetLastError`](https://searchfox.org/mozilla-central/rev/76a83d0a218837ba6937d6a0fac51cb0008c2334/xpcom/io/nsLocalFileWin.cpp#417) did return `0`. But a `ConvertWinError`function that may return NS_OK seems odd. These are start-up crashes on the main thread opening omni.ja, it seems.