[Bug 2510] New: [IcedTea6] Backport font layout fixes from OpenJDK 8

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=2510

            Bug ID: 2510
           Summary: [IcedTea6] Backport font layout fixes from OpenJDK 8
           Product: IcedTea
           Version: 6-hg
          Hardware: all
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5
         Component: IcedTea
          Assignee: gnu.andrew at redhat.com
          Reporter: gnu.andrew at redhat.com
                CC: unassigned at icedtea.classpath.org

Clone of PR2509 for IcedTea 1.x.

# Derivative: IcedTea6 1.13.7
# Distribution: Gentoo Base System release 2.2, package Gentoo package
icedtea-6.1.13.7
# Problematic frame:
# C  [libfontmanager.so+0x36474] 
Java_sun_font_SunLayoutEngine_nativeLayout+0x234

0x0000036a24103474 in Java_sun_font_SunLayoutEngine_nativeLayout
(env=0x36ab00091d8, cls=<optimized out>, 
    font2d=<optimized out>, strike=<optimized out>, matrix=<optimized out>,
gmask=0, baseIndex=0, text=0x36ab64a51f8, 
    start=0, limit=20, min=0, max=20, script=25, lang=-1, typo_flags=0,
pt=0x36ab64a51b8, gvdata=0x36ab64a51b0, upem=1000, 
    layoutTables=3756756201904) at
../../../src/share/native/sun/font/layout/SunLayoutEngine.cpp:209
209    ../../../src/share/native/sun/font/layout/SunLayoutEngine.cpp: No such
file or directory.
(gdb) bt
#0  0x0000036a24103474 in Java_sun_font_SunLayoutEngine_nativeLayout
(env=0x36ab00091d8, cls=<optimized out>, 
    font2d=<optimized out>, strike=<optimized out>, matrix=<optimized out>,
gmask=0, baseIndex=0, text=0x36ab64a51f8, 
    start=0, limit=20, min=0, max=20, script=25, lang=-1, typo_flags=0,
pt=0x36ab64a51b8, gvdata=0x36ab64a51b0, upem=1000, 
    layoutTables=3756756201904) at
../../../src/share/native/sun/font/layout/SunLayoutEngine.cpp:209
#1  0x0000036aac9f0790 in ?? ()
#2  0x0000000000000000 in ?? ()
(gdb) print engine
$1 = (LayoutEngine *) 0x0

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