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Fix te_expr's flexible array member

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te_expr has a flexible array member, but it's declared as size 1.
Stop declaring its size so UBSan stops complaining.

Noted in #2852
This commit is contained in:
ridiculousfish 2019-02-05 22:08:15 -08:00
parent 6025c28efc
commit 26ada583a0
1 changed files with 2 additions and 2 deletions
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4
src/tinyexpr.cpp
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@ -56,7 +56,7 @@ int get_arity(const int type) {
typedef struct te_expr {
int type;
union {double value; const void *function;};
te_expr *parameters[1];
te_expr *parameters[];
} te_expr;
// TODO: Rename since variables have been removed.
@ -92,7 +92,7 @@ void te_free(te_expr *n);
static te_expr *new_expr(const int type, const te_expr *parameters[]) {
const int arity = get_arity(type);
const int psize = sizeof(te_expr*) * arity;
const int size = (sizeof(te_expr) - sizeof(void*)) + psize;
const int size = sizeof(te_expr) + psize;
te_expr *ret = (te_expr *)malloc(size);
// This sets float to 0, which depends on the implementation.
// We rely on IEEE-754 floats anyway, so it's okay.