Compilation problem with 4.10

[hulpke]

Observed behaviour

when compiling I get an error

C       src/read.c => obj/src/read.lo
src/read.c: In function ‘ReadVar’:
src/read.c:619: error: unknown field ‘var’ specified in initializer
src/read.c:619: warning: missing braces around initializer
src/read.c:619: warning: (near initialization for ‘ref.<anonymous>’)
src/read.c:619: error: unknown field ‘nest0’ specified in initializer
At top level:
cc1: warning: unrecognized command line option "-Wno-cast-function-type"
cc1: warning: unrecognized command line option "-Wno-implicit-fallthrough"

Expected behaviour

GAP should compile. (I can hack around it, but others might not be able to)

Copy and paste GAP banner (to tell us about your setup)

gcc version 4.4.7 20120313 (Red Hat 4.4.7-23) (GCC)

(This is a system with lots of memory I have access to but no root access. For stability reasons it is still using an older RedHat, so "update the compiler" is not an option for me)

[fingolfin]

This sounds like a compiler bug, but one that we should be able to work around. Could you please try replacing the offending line by this:

    LHSRef ref = { R_INVALID, {0}, {0} };

If that does not help, we can still resort to this:

LHSRef ref; ref.type = R_INVALID; ref.var = 0; ref.nest0 = 0;

or this

LHSRef ref;
memset(&ref, 0, sizeof(ref));

[hulpke]

@fingolfin
The first version you suggest works OK. Thanks.

[olexandr-konovalov]

Backported to stable-4.10 in 986d08a to be ready for GAP 4.10.1 release.