CVS commit: src/usr.bin/xlint/lint1

["Roland Illig" <rillig%netbsd.org@localhost>]

Module Name:    src
Committed By:   rillig
Date:           Sat Apr 22 20:17:19 UTC 2023

Modified Files:
        src/usr.bin/xlint/lint1: debug.c tree.c

Log Message:
lint: fix missing initialization for cast to union

The left operand of a unary AST node must not be NULL.

The previous code crashed lint when run with some query enabled, as
is_cast_redundant assumes that a non-null AST node has valid operands.

$ cat <<EOF > crash.c
double
demo(void) {
        union u {
                double *num;
        } u;
        u = (union u)&((double) { 0.0 });
        return *u.num;
}
EOF
$ /usr/libexec/lint1 -w -S -g -q8 crash.c /dev/null


To generate a diff of this commit:
cvs rdiff -u -r1.29 -r1.30 src/usr.bin/xlint/lint1/debug.c
cvs rdiff -u -r1.517 -r1.518 src/usr.bin/xlint/lint1/tree.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.