https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106295
Bug ID: 106295
Summary: INQUIRE statement bus error at runtime
Product: gcc
Version: 11.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libfortran
Assignee: unassigned at gcc dot gnu.org
Reporter: ghlixo at gmail dot com
Target Milestone: ---
Created attachment 53296
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53296&action=edit
Main program (to be compiled with latest release, e.g. 11.2.0)
Fortran subroutine using INQUIRE(UNIT=..., OPENED=...) compiled with gfortran
4.9.2 fails with bus error when linked by gfortran 11.2.0 to main program.
Works OK if subroutine recompiled with gfortran 11.2.0; clearly a run-time
library version skew; possibly a library versioning bug.
If not a bug, and instead a fact of life of libfortran evolution, there should
be better user-level documentation of when library incompatibilities happen,
ideally in the gfortran/news wiki. Then those who provide subroutine packages
for general use can alert their users of runtime library compatibility issues.
The only gfortran documentation I've seen discussing library version
incompatibilities is in
https://gcc.gnu.org/wiki/LibgfortranAbiCleanup
which mentions the ABI being broken in version 7 and again in version 8; I
wouldn't quite call this user-level information.
Target: x86_64-apple-darwin18.7.0
Debug output:
#/usr/local/bin/gfortran -g -c -o /tmp/inqtest.o /tmp/inqtest.f # gfortran
4.9.2
#gfortran -g -o /tmp/inqmain /tmp/inqmain.o /tmp/inqtest.o # gfortran
11.2.0
#gdb /tmp/inqmain
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Reading symbols from /tmp/inqmain...
(gdb) run
Starting program: /private/tmp/inqmain
[New Thread 0x2603 of process 92337]
[New Thread 0x1803 of process 92337]
[New Thread 0x2303 of process 92337]
Thread 3 received signal SIGBUS, Bus error.
0x00000001002e6fe5 in ?? () from /opt/gfortran/lib/libgfortran.5.dylib
(gdb) where
#0 0x00000001002e6fe5 in ?? () from /opt/gfortran/lib/libgfortran.5.dylib
#1 0x00000001002e7f35 in ?? () from /opt/gfortran/lib/libgfortran.5.dylib
#2 0x0000000100000d55 in zgtfun (nfun=19, nerr=0) at /tmp/inqtest.f:10
#3 0x0000000100000c83 in MAIN__ () at /tmp/inqmain.f:6
(gdb) up
#1 0x00000001002e7f35 in ?? () from /opt/gfortran/lib/libgfortran.5.dylib
(gdb) up
#2 0x0000000100000d55 in zgtfun (nfun=19, nerr=0) at /tmp/inqtest.f:10
10 inquire(unit=nfun,opened=lopen)
(gdb) q
A debugging session is active.
Inferior 1 [process 92337] will be killed.
Quit anyway? (y or n) y
#
