Segmentation fault with expression on linux

Hello Peter,

I can't reproduce this with 1.2.0, nor 1.1.1 on RedHat6.2. Could you
please try running it with R -d gdb until the point of crash and show
us a backtrace?

thank you very much for your immediate reply. Unfortunalely I am not a C
programmer. My skills are on a "applied low level", to write simulations
and simple scripts in Turbo-Pascal, Java, ... and :) R or to do a make
configure", make, make install. Maybe, that a misconfiguration of my
system was not detected by the make procedure and this is the reason for
the crash. Nevertheless I run gdb and found the following output:

Program received signal SIGSEGV, Segmentation fault.
0x4023220b in X11_MetricInfo (c=115, ascent=0xbfffd2c4,
descent=0xbfffd2cc,
    width=0xbfffd2d4, dd=0x89dfe08) at devX11.c:1299
1299            *ascent = xd->font->per_char[c-first].ascent;

backtrace then gives:
=====================

(gdb) backtrace
#0  0x4023220b in X11_MetricInfo (c=115, ascent=0xbfffd2c4,
    descent=0xbfffd2cc, width=0xbfffd2d4, dd=0x89dfe08) at devX11.c:1299
#1  0x8094b1c in Rf_GMetricInfo (c=115, ascent=0xbfffd2c4,
descent=0xbfffd2cc,
    width=0xbfffd2d4, units=INCHES, dd=0x89dfe08) at graphics.c:2627
#2  0x80c6624 in GlyphBBox (chr=115) at plotmath.c:936
#3  0x80c6751 in RenderSymbolChar (ascii=115, draw=0) at plotmath.c:982
#4  0x80c6ba9 in RenderSymbol (expr=0x857f25c, draw=0) at
plotmath.c:1091
#5  0x80c6e3e in RenderAtom (expr=0x857f25c, draw=0) at plotmath.c:1166
#6  0x80cc11e in RenderElement (expr=0x857f25c, draw=0) at
plotmath.c:2800
#7  0x80c8858 in RenderFraction (expr=0x8a00154, rule=1, draw=0)
    at plotmath.c:1727
#8  0x80c8b9e in RenderOver (expr=0x8a00154, draw=0) at plotmath.c:1772
#9  0x80cbe34 in RenderFormula (expr=0x8a00154, draw=0) at
plotmath.c:2750
#10 0x80cc111 in RenderElement (expr=0x8a00154, draw=0) at
plotmath.c:2798
#11 0x80c75a5 in RenderBin (expr=0x8a0018c, draw=0) at plotmath.c:1341
#12 0x80cbd32 in RenderFormula (expr=0x8a0018c, draw=0) at
plotmath.c:2736
#13 0x80cc111 in RenderElement (expr=0x8a0018c, draw=0) at
plotmath.c:2798
#14 0x80c79e4 in RenderSup (expr=0x8a001e0, draw=0) at plotmath.c:1438
#15 0x80cbd55 in RenderFormula (expr=0x8a001e0, draw=0) at
plotmath.c:2738
#16 0x80cc111 in RenderElement (expr=0x8a001e0, draw=0) at
plotmath.c:2798
#17 0x80cb25c in RenderRel (expr=0x8a00234, draw=0) at plotmath.c:2476
#18 0x80cbfae in RenderFormula (expr=0x8a00234, draw=0) at
plotmath.c:2770
#19 0x80cc111 in RenderElement (expr=0x8a00234, draw=0) at
plotmath.c:2798
---Type <return> to continue, or q <return> to quit---
#20 0x80cc353 in Rf_GMathText (x=3.6786417322834639,
y=3.5863681102362204,
    coords=13, expr=0x8a00234, xc=0.5, yc=NaN(0x80000000007a2), rot=0,
    dd=0x89dfe08) at plotmath.c:2904
#21 0x80ba85a in do_text (call=0x8836a84, op=0x81e8c74, args=0x81d8008,
    env=0x89fe798) at plot.c:2008
#22 0x80a567a in do_internal (call=0x88369f8, op=0x81dd19c,
args=0x8836a14,
    env=0x89fe798) at names.c:925
#23 0x80862c7 in Rf_eval (e=0x88369f8, rho=0x89fe798) at eval.c:317
#24 0x8087490 in do_begin (call=0x88356f4, op=0x81dd554, args=0x88356d8,
    rho=0x89fe798) at eval.c:803
#25 0x80862c7 in Rf_eval (e=0x88356f4, rho=0x89fe798) at eval.c:317
#26 0x80868d8 in Rf_applyClosure (call=0x89feba4, op=0x88368fc,
    arglist=0x89fdfe4, rho=0x89fdee8, suppliedenv=0x89febdc) at
eval.c:501
#27 0x80a5a31 in applyMethod (call=0x89feba4, op=0x88368fc,
args=0x89fdfe4,
    rho=0x89fdee8, newrho=0x89febdc) at objects.c:117
#28 0x80a6058 in Rf_usemethod (generic=0xbfffe158 "text", obj=0x89fd168,
    call=0x8834e60, args=0x81d8008, rho=0x89fdee8, ans=0xbfffe154)
    at objects.c:271
#29 0x80a624d in do_usemethod (call=0x8834e60, op=0x81ea994,
args=0x8834e7c,
    env=0x89fdee8) at objects.c:325
#30 0x80862c7 in Rf_eval (e=0x8834e60, rho=0x89fdee8) at eval.c:317
#31 0x80868d8 in Rf_applyClosure (call=0x89fe47c, op=0x8834d80,
    arglist=0x89fdfe4, rho=0x81eb480, suppliedenv=0x81d8008) at
eval.c:501
---Type <return> to continue, or q <return> to quit---
#32 0x8086528 in Rf_eval (e=0x89fe47c, rho=0x81eb480) at eval.c:352
#33 0x8088454 in do_eval (call=0x87b4440, op=0x81e7418, args=0x89fe0e0,
    rho=0x89fe134) at eval.c:1281
#34 0x80a567a in do_internal (call=0x87b43b4, op=0x81dd19c,
args=0x87b43d0,
    env=0x89fe134) at names.c:925
#35 0x80862c7 in Rf_eval (e=0x87b43b4, rho=0x89fe134) at eval.c:317
#36 0x80868d8 in Rf_applyClosure (call=0x87b6f30, op=0x89d9cec,
    arglist=0x89fe1dc, rho=0x89d9dcc, suppliedenv=0x81d8008) at
eval.c:501
#37 0x8086528 in Rf_eval (e=0x87b6f30, rho=0x89d9dcc) at eval.c:352
#38 0x8087b56 in do_set (call=0x87b6edc, op=0x81dd5fc, args=0x87b6ef8,
    rho=0x89d9dcc) at eval.c:1008
#39 0x80862c7 in Rf_eval (e=0x87b6edc, rho=0x89d9dcc) at eval.c:317
#40 0x8087490 in do_begin (call=0x87b616c, op=0x81dd554, args=0x87b6150,
    rho=0x89d9dcc) at eval.c:803
#41 0x80862c7 in Rf_eval (e=0x87b616c, rho=0x89d9dcc) at eval.c:317
#42 0x8087001 in do_for (call=0x87b8ccc, op=0x81d7a04, args=0x87b8ce8,
    rho=0x89d9dcc) at eval.c:678
#43 0x80862c7 in Rf_eval (e=0x87b8ccc, rho=0x89d9dcc) at eval.c:317
#44 0x8087490 in do_begin (call=0x87b42d4, op=0x81dd554, args=0x87b42b8,
    rho=0x89d9dcc) at eval.c:803
#45 0x80862c7 in Rf_eval (e=0x87b42d4, rho=0x89d9dcc) at eval.c:317
#46 0x80868d8 in Rf_applyClosure (call=0x89d6538, op=0x87b9abc,
    arglist=0x89d9ec8, rho=0x81eb480, suppliedenv=0x81d8008) at
eval.c:501
#47 0x8086528 in Rf_eval (e=0x89d6538, rho=0x81eb480) at eval.c:352
#48 0x809b1a1 in R_ReplConsole (rho=0x81eb480, savestack=0,
browselevel=0)
    at main.c:187
#49 0x809b8f2 in run_Rmainloop () at main.c:485
#50 0x809b930 in Rf_mainloop () at main.c:499
#51 0x80ec82b in main (ac=1, av=0xbffff684) at system.c:88
(gdb)                                                              

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Is there anything else, what I can do in order to isolate the problem?

Thank you!

Thomas Petzoldt