Re: [platform-swt-dev] SWT produce a VM failure on a GC.getFontMetrics()

[Steve Northover <Steve_Northover@xxxxxxxxxx>]

Looks like a pango version problem.
 Please enter a bugzilla report.  Thanks.

Mike Wilson/Ottawa/IBM@IBMCA
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10/08/2004 10:48 AM

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Subject	Re: [platform-swt-dev] SWT produce a VM failure on a GC.getFontMetrics() call.

True, but that does excuse the fact that SWT crashed.
Seems like another 
place where an isDisposed check is needed.

McQ.




Arnaud De Muyser <ademuyser@xxxxxxxxxx> 
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10/08/04 09:03
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Re: [platform-swt-dev] SWT produce a VM failure on a GC.getFontMetrics()
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Seek in it before sent mail .... Sorry. 

This is due to the following situation: 

Font font = new Font( ... ); 
gc.setFont( font ); 
font.dispose(); 
gc.getFontMetrics() => core. 

The right think is to not dispose font after set it in a gc ... 



Arnaud De Muyser/France/IBM@IBMFR 
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10/08/2004 02:37 PM 

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[platform-swt-dev] SWT produce a VM failure on a GC.getFontMetrics() call.









Does anyone have already seen this kind of joke ? 
Using Eclipse SDK 3.0.1 on a Linux Suse. 
Thanks for your help. 
Arnaud. 


** (<unknown>:668): CRITICAL **: file pango-fontmap.c: line 126 
(pango_font_map_load_fontset): assertion 
`pango_font_description_get_family (desc) != NULL' failed 

** (<unknown>:668): CRITICAL **: file pango-fontset.c: line 101 
(pango_fontset_get_metrics): assertion `fontset != NULL' failed 

(<unknown>:668): GLib-GObject-CRITICAL **: file gobject.c: line 1337
(g_object_unref): assertion `G_IS_OBJECT (object)' failed 

** (<unknown>:668): CRITICAL **: file fonts.c: line 1206 
(pango_font_metrics_get_ascent): assertion `metrics != NULL' failed 

** (<unknown>:668): CRITICAL **: file fonts.c: line 1226 
(pango_font_metrics_get_descent): assertion `metrics != NULL' failed 

** (<unknown>:668): CRITICAL **: file fonts.c: line 1245 
(pango_font_metrics_get_approximate_char_width): assertion `metrics !=
NULL' failed 

** (<unknown>:668): CRITICAL **: file fonts.c: line 1182 
(pango_font_metrics_unref): assertion `metrics != NULL' failed 

** (<unknown>:668): CRITICAL **: file pango-fontmap.c: line 126 
(pango_font_map_load_fontset): assertion 
`pango_font_description_get_family (desc) != NULL' failed 

** (<unknown>:668): CRITICAL **: file pango-fontset.c: line 101 
(pango_fontset_get_metrics): assertion `fontset != NULL' failed 

(<unknown>:668): GLib-GObject-CRITICAL **: file gobject.c: line 1337
(g_object_unref): assertion `G_IS_OBJECT (object)' failed 

** (<unknown>:668): CRITICAL **: file fonts.c: line 1206 
(pango_font_metrics_get_ascent): assertion `metrics != NULL' failed 

** (<unknown>:668): CRITICAL **: file fonts.c: line 1226 
(pango_font_metrics_get_descent): assertion `metrics != NULL' failed 

** (<unknown>:668): CRITICAL **: file fonts.c: line 1245 
(pango_font_metrics_get_approximate_char_width): assertion `metrics !=
NULL' failed 

** (<unknown>:668): CRITICAL **: file fonts.c: line 1182 
(pango_font_metrics_unref): assertion `metrics != NULL' failed 

An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : 11 occurred at PC=0x400E49DF 
Function=strlen+0xF 
Library=/lib/libc.so.6 

Current Java thread: 
       at org.eclipse.swt.internal.gtk.OS.pango_context_get_metrics(Native
Method) 
       - locked <0x4831db20> (a java.lang.Class) 
       at org.eclipse.swt.graphics.GC.getFontMetrics(GC.java:1472)
               at .... 

and Sun's VM (1.4.2) produce a core file ... 

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