On Jul 19, 2005, at 6:39 AM, [EMAIL PROTECTED] wrote:
> Sourcing this code causes the R GUI to crash. I've enclosed a
> partial backtrace
> from the crash below.
I can confirm that this crashes both on OS X (current R-devel) and
Linux (2.1.1). The detailed stack trace (with debug symbols) from OS
X follows.
However, I can't find any documentation on "null" units (?unit
doesn't mention them), so I wonder whether this is just a missing
sanity check or something more profound ...
#0 Rf_isObject (s=0x68000001) at ../../../../R-devel/src/main/util.c:
616
#1 0x003060e4 in Rf_inherits (s=0x68000001, name=0x966ad80
"unit.arithmetic") at ../../../../R-devel/src/main/util.c:624
#2 0x096651b8 in pureNullUnit (unit=0x68000001, index=0,
dd=0x113eff0) at ../../../../../../R-devel/src/library/grid/src/
unit.c:270
#3 0x096651fc in pureNullUnit (unit=0x10ff78e8, index=2,
dd=0x113eff0) at ../../../../../../R-devel/src/library/grid/src/
unit.c:273
#4 0x09662768 in findRelWidths (layout=0x108d7528,
relativeWidths=0x11b0b4f8, dd=0x113eff0) at ../../../../../../R-devel/
src/library/grid/src/layout.c:70
#5 0x09663720 in calcViewportLayout (viewport=0x10bfad60,
parentWidthCM=12.699999999999999, parentHeightCM=12.699999999999999,
parentContext={xscalemin = 0, xscalemax = 1, yscalemin = 0, yscalemax
= 1}, parentgc=0xbfff76f0, dd=0x113eff0) at ../../../../../../R-devel/
src/library/grid/src/layout.c:463
#6 0x09669888 in calcViewportTransform (vp=0x10bfad60,
parent=0x10c6af38, incremental=3221190720, dd=0x113eff0)
at ../../../../../../R-devel/src/library/grid/src/viewport.c:351
#7 0x0965cefc in doSetViewport (vp=0x10bfad60, topLevelVP=157724032,
pushing=281456440, dd=0x113eff0) at ../../../../../../R-devel/src/
library/grid/src/grid.c:185
#8 0x0965d40c in L_setviewport (vp=0x10bfad60, hasParent=0x10d4da68)
at ../../../../../../R-devel/src/library/grid/src/grid.c:302
#9 0x0024a0b0 in do_dotcall (call=0x119008d8, op=0x966ad80,
args=0x18681b0, env=0x80808080) at ../../../../R-devel/src/main/
dotcode.c:788
#10 0x0024da14 in do_dotcallgr (call=0x119008d8, op=0x18c5794,
args=0x11902244, env=0x11900ccc) at ../../../../R-devel/src/main/
dotcode.c:1468
#11 0x00264964 in Rf_eval (e=0x119008d8, rho=0x11900ccc)
at ../../../../R-devel/src/main/eval.c:405
Cheers,
Simon
> ==============
> require(grid)
>
> sometext = "hello there\nthis is a \ntest!"
>
> pushViewport(
> viewport(
> layout=grid.layout(1,3,
> widths=unit.c(
> unit(1,"strwidth",sometext) +
> unit(2,"cm"),
> unit(1,"null")
> )
> )
> )
> )
> ==============
>
> Date/Time: 2005-07-19 11:35:30.950 +0100
> OS Version: 10.4.2 (Build 8C46)
> Report Version: 3
>
> Command: R
> Path: /Volumes/George/MyApplications/R.app/Contents/MacOS/R
> Parent: WindowServer [146]
>
> Version: 1.12 (1622)
>
> PID: 10493
> Thread: 0
>
> Exception: EXC_BAD_ACCESS (0x0001)
> Codes: KERN_INVALID_ADDRESS (0x0001) at 0x68000001
>
> Thread 0 Crashed:
> 0 libR.dylib 0x00303d1c Rf_isObject + 0 (util.c:
> 623)
> 1 grid.so 0x060c6240 pureNullUnit + 40
> (unit.c:270)
> 2 grid.so 0x060c6284 pureNullUnit + 108
> (unit.c:273)
> 3 grid.so 0x060c3894 findRelWidths + 60
> (layout.c:69)
> 4 grid.so 0x060c484c calcViewportLayout + 172
> (layout.c:464)
> 5 grid.so 0x060ca888 calcViewportTransform +
> 1296
> (viewport.c:356)
> 6 grid.so 0x060be0a0 doSetViewport + 256
> (grid.c:200)
> 7 grid.so 0x060be5ac L_setviewport + 76
> (grid.c:311)
> 8 libR.dylib 0x00249318 do_dotcall + 652
> (dotcode.c:770)
> 9 libR.dylib 0x0024cc7c do_dotcallgr + 80
> (dotcode.c:1450)
> 10 libR.dylib 0x00263b24 Rf_eval + 1536 (eval.c:
> 405)
> 11 libR.dylib 0x00265b1c do_set + 224 (eval.c:1309)
>
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>
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