<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>176154</bug_id>
          
          <creation_ts>2017-08-31 02:43:54 -0700</creation_ts>
          <short_desc>[GTK][Wayland] Crash when gdk_keymap_get_entries_for_keyval returns TRUE but n_keys=0</short_desc>
          <delta_ts>2017-08-31 07:07:23 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>WebKitGTK</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          <see_also>https://bugzilla.gnome.org/show_bug.cgi?id=787069</see_also>
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>Gtk</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Carlos Garcia Campos">cgarcia</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>bugs-noreply</cc>
    
    <cc>clopez</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1343885</commentid>
    <comment_count>0</comment_count>
    <who name="Carlos Garcia Campos">cgarcia</who>
    <bug_when>2017-08-31 02:43:54 -0700</bug_when>
    <thetext>I think this is actually a GTK+ bug (I&apos;ll file a bug report), but in Wayland gdk_keymap_get_entries_for_keyval() can return TRUE with n_keys=0. We have several places in WebKit where we just check the return value of gdk_keymap_get_entries_for_keyval() and then use the returned array to get the first position assuming it has at least one item. This has always worked in X11 because the GDK X11 backend does the right thing, but it&apos;s crashing in Wayland now. It should be fixed in GTK+ but in the meantime it&apos;s easy to workaround by also checking n_keys &gt; 0.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1343887</commentid>
    <comment_count>1</comment_count>
      <attachid>319454</attachid>
    <who name="Carlos Garcia Campos">cgarcia</who>
    <bug_when>2017-08-31 02:47:51 -0700</bug_when>
    <thetext>Created attachment 319454
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1343888</commentid>
    <comment_count>2</comment_count>
      <attachid>319455</attachid>
    <who name="Carlos Garcia Campos">cgarcia</who>
    <bug_when>2017-08-31 02:55:24 -0700</bug_when>
    <thetext>Created attachment 319455
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1343920</commentid>
    <comment_count>3</comment_count>
    <who name="Carlos Garcia Campos">cgarcia</who>
    <bug_when>2017-08-31 07:07:23 -0700</bug_when>
    <thetext>Committed r221419: &lt;http://trac.webkit.org/changeset/221419&gt;</thetext>
  </long_desc>
      
          <attachment
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              ispatch="1"
              isprivate="0"
          >
            <attachid>319454</attachid>
            <date>2017-08-31 02:47:51 -0700</date>
            <delta_ts>2017-08-31 02:55:24 -0700</delta_ts>
            <desc>Patch</desc>
            <filename>wk-wayland-crash.diff</filename>
            <type>text/plain</type>
            <size>9131</size>
            <attacher name="Carlos Garcia Campos">cgarcia</attacher>
            
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            <attachid>319455</attachid>
            <date>2017-08-31 02:55:24 -0700</date>
            <delta_ts>2017-08-31 07:01:36 -0700</delta_ts>
            <desc>Patch</desc>
            <filename>wk-wayland-crash.diff</filename>
            <type>text/plain</type>
            <size>9129</size>
            <attacher name="Carlos Garcia Campos">cgarcia</attacher>
            
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<flag name="review"
          id="339738"
          type_id="1"
          status="+"
          setter="clopez"
    />
          </attachment>
      

    </bug>

</bugzilla>