[LLVMbugs] [Bug 13416] New: -Wsometimes-uninitialized prints two errors for one issue

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13416

             Bug #: 13416
           Summary: -Wsometimes-uninitialized prints two errors for one
                    issue
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Frontend
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: nicolasweber at gmx.de
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Somewhere in chromium:

../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:896:9: error:
variable 'backup_homepage_is_ntp' is used uninitialized whenever '||' condition
is true [-Werror,-Wsometimes-uninitialized]
    if (!prefs_watcher->GetBackupForPref(prefs::kHomePage)->
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:911:9: note:
uninitialized use occurs here
        backup_homepage_is_ntp,
        ^~~~~~~~~~~~~~~~~~~~~~
../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:896:9: note:
remove the '||' if its condition is always false
    if (!prefs_watcher->GetBackupForPref(prefs::kHomePage)->
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:894:32: note:
initialize the variable 'backup_homepage_is_ntp' to silence this warning
    bool backup_homepage_is_ntp;
                               ^
                                = false
../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:896:9: error:
variable 'backup_show_home_button' is used uninitialized whenever '||'
condition is true [-Werror,-Wsometimes-uninitialized]
    if (!prefs_watcher->GetBackupForPref(prefs::kHomePage)->
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:912:9: note:
uninitialized use occurs here
        backup_show_home_button));
        ^~~~~~~~~~~~~~~~~~~~~~~
../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:896:9: note:
remove the '||' if its condition is always false
    if (!prefs_watcher->GetBackupForPref(prefs::kHomePage)->
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:896:9: error:
variable 'backup_show_home_button' is used uninitialized whenever '||'
condition is true [-Werror,-Wsometimes-uninitialized]
    if (!prefs_watcher->GetBackupForPref(prefs::kHomePage)->
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:912:9: note:
uninitialized use occurs here
        backup_show_home_button));
        ^~~~~~~~~~~~~~~~~~~~~~~
../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:896:9: note:
remove the '||' if its condition is always false
    if (!prefs_watcher->GetBackupForPref(prefs::kHomePage)->
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../chrome/browser/ui/startup/startup_browser_creator_impl.cc:895:33: note:
initialize the variable 'backup_show_home_button' to silence this warning
    bool backup_show_home_button;
                                ^
                                 = false



Note that the second variable has two errors on the same line.

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