Re: c++/5247: [2003-01-22]ICE on default parameter in constructor which is reference to class

Re: c++/5247: [2003-01-22]ICE on default parameter in constructor which is reference to class

[Wolfgang Bangerth]

The following reply was made to PR c++/5247; it has been noted by GNATS.

From: Wolfgang Bangerth <bangerth@ices.utexas.edu>
To: Giovanni Bajo <giovannibajo@libero.it>
Cc: gcc-gnats@gcc.gnu.org, <gcc-bugs@gcc.gnu.org>,
   <schmid@snake.iap.physik.tu-darmstadt.de>
Subject: Re: c++/5247: [2003-01-22]ICE on default parameter in constructor
 which is reference to class
Date: Tue, 1 Apr 2003 20:21:26 -0600 (CST)

 > The testcase compiles on my 2.95:
 > 
 > $ g++-2 -v
 > Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/2.95.3-10/specs
 > gcc version 2.95.3-10 (cygwin special)
 > 
 > Can somebody double-check?
 
 It gets into an infinite memory eating loop for me with 2.95.3 20010315 (SuSE).
 
 However, here's some more fodder for bug fixers: with 3.4, the loop is 
 these functions, apparently calling each other in infinite ways (I just 
 killed cc1plus at an arbitrary point, so your stack trace will look 
 differently; at this time, gdb showed me the first ~9000 stack frames, 
 before I had to kill it...)
 
 #0  0x08138b87 in break_out_target_exprs (t=0x4015dae0)
     at cp/tree.c:1509
 #1  0x080548b7 in convert_default_arg (type=0x40199288, arg=0x0, 
     fn=0x40199dec, parmnum=1) at cp/call.c:4416
 #2  0x08054eaf in build_over_call (cand=0x446bf70c, flags=3)
     at cp/call.c:4577
 #3  0x0805416d in convert_like_real (convs=0x40199dec, expr=0x4015dae0, 
     fn=0x0, argnum=0, inner=-1) at cp/call.c:4149
 #4  0x08053dca in convert_like_real (convs=0x446c1654, expr=0x4015dae0, 
     fn=0x0, argnum=0, inner=0) at cp/call.c:4220
 #5  0x0805a321 in initialize_reference (type=0x40199288, expr=0x4015dae0, 
     decl=0x0) at cp/call.c:6132
 #6  0x08113f48 in convert_for_initialization (exp=0x40199288, type=0x0, 
     rhs=0x4015dae0, flags=3, errtype=0x84a0e78 "default argument", 
     fndecl=0x40199dec, parmnum=1) at cp/typeck.c:6202
 #7  0x080548fc in convert_default_arg (type=0x40199288, arg=0x0, 
     fn=0x40199dec, parmnum=1) at cp/call.c:4430
 #8  0x08054eaf in build_over_call (cand=0x446bf6b4, flags=3)
     at cp/call.c:4577
 #9  0x0805416d in convert_like_real (convs=0x40199dec, expr=0x4015dae0, 
     fn=0x0, argnum=0, inner=-1) at cp/call.c:4149
 #10 0x08053dca in convert_like_real (convs=0x446c1528, expr=0x4015dae0, 
     fn=0x0, argnum=0, inner=0) at cp/call.c:4220
 #11 0x0805a321 in initialize_reference (type=0x40199288, expr=0x4015dae0, 
     decl=0x0) at cp/call.c:6132
 #12 0x08113f48 in convert_for_initialization (exp=0x40199288, type=0x0, 
     rhs=0x4015dae0, flags=3, errtype=0x84a0e78 "default argument", 
     fndecl=0x40199dec, parmnum=1) at cp/typeck.c:6202
 #13 0x080548fc in convert_default_arg (type=0x40199288, arg=0x0, 
     fn=0x40199dec, parmnum=1) at cp/call.c:4430
 #14 0x08054eaf in build_over_call (cand=0x446bf65c, flags=3)
     at cp/call.c:4577
 #15 0x0805416d in convert_like_real (convs=0x40199dec, expr=0x4015dae0, 
     fn=0x0, argnum=0, inner=-1) at cp/call.c:4149
 #16 0x08053dca in convert_like_real (convs=0x446c13fc, expr=0x4015dae0, 
     fn=0x0, argnum=0, inner=0) at cp/call.c:4220
 #17 0x0805a321 in initialize_reference (type=0x40199288, expr=0x4015dae0, 
     decl=0x0) at cp/call.c:6132
 #18 0x08113f48 in convert_for_initialization (exp=0x40199288, type=0x0, 
     rhs=0x4015dae0, flags=3, errtype=0x84a0e78 "default argument", 
     fndecl=0x40199dec, parmnum=1) at cp/typeck.c:6202
 #19 0x080548fc in convert_default_arg (type=0x40199288, arg=0x0, 
     fn=0x40199dec, parmnum=1) at cp/call.c:4430
 #20 0x08054eaf in build_over_call (cand=0x446bf604, flags=3)
     at cp/call.c:4577
 #21 0x0805416d in convert_like_real (convs=0x40199dec, expr=0x4015dae0, 
     fn=0x0, argnum=0, inner=-1) at cp/call.c:4149
 #22 0x08053dca in convert_like_real (convs=0x446c12d0, expr=0x4015dae0, 
     fn=0x0, argnum=0, inner=0) at cp/call.c:4220
 #23 0x0805a321 in initialize_reference (type=0x40199288, expr=0x4015dae0, 
     decl=0x0) at cp/call.c:6132
 #24 0x08113f48 in convert_for_initialization (exp=0x40199288, type=0x0, 
     rhs=0x4015dae0, flags=3, errtype=0x84a0e78 "default argument", 
     fndecl=0x40199dec, parmnum=1) at cp/typeck.c:6202
 #25 0x080548fc in convert_default_arg (type=0x40199288, arg=0x0, 
     fn=0x40199dec, parmnum=1) at cp/call.c:4430
 
 
 W.
 
 -------------------------------------------------------------------------
 Wolfgang Bangerth              email:            bangerth@ices.utexas.edu
                                www: http://www.ices.utexas.edu/~bangerth/
 
 

Re: c++/5247: [2003-01-22]ICE on default parameter in constructor which is reference to class

[Giovanni Bajo]

The following reply was made to PR c++/5247; it has been noted by GNATS.

From: "Giovanni Bajo" <giovannibajo@libero.it>
To: <gcc-gnats@gcc.gnu.org>,
	<gcc-bugs@gcc.gnu.org>,
	<nobody@gcc.gnu.org>,
	<gcc-prs@gcc.gnu.org>,
	<schmid@snake.iap.physik.tu-darmstadt.de>
Cc: "Wolfgang Bangerth" <bangerth@ices.utexas.edu>
Subject: Re: c++/5247: [2003-01-22]ICE on default parameter in constructor which is reference to class
Date: Wed, 2 Apr 2003 04:07:23 +0200

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&p
 r=5247
 
 The testcase compiles on my 2.95:
 
 $ g++-2 -v
 Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/2.95.3-10/specs
 gcc version 2.95.3-10 (cygwin special)
 
 Can somebody double-check? If it really works with 2.95, this is a
 regression and should be flagged as such.
 
 Giovanni Bajo