C Error when compiling V with `println` or `dump` calls

[timbasel]

V version: V 0.2.4 71d9871.1fdbdf4 OS: Arch linux

When I insert some println call into the compiler it won't wont compile its self after the first run again. e.g.

pub fn (t &Table) find_method_from_embeds(sym &TypeSymbol, method_name string) ?(Fn, []Type) {
	if sym.info is Struct {
		mut found_methods := []Fn{}
		mut embed_of_found_methods := []Type{}
		println(sym.info) // << inserted call
		for embed in sym.info.embeds {
			embed_sym := t.sym(embed)
                       // ...

after the first successful compile using v self every run after that will fail with the following error (and also having correctly printed the sym.info)

==================
/tmp/v_1000/v.9709905541096883223.tmp.c:29540: error: unrecognized character \x01
...
==================

The C file contains invalid characters and null bytes (that I can't paste into the issue, there are some at the end of the v__dotgraph__DotGraph_new_node line) in a random spot.

void v__depgraph__show(v__depgraph__DepGraph* graph, string path) {
	v__dotgraph__DotGraph* dg = v__dotgraph__new(_SLIT("ModGraph"),  str_intp(2, _MOV((StrIntpData[]){{_SLIT("ModGraph for "), 0xfe10, {.d_s = path}}, {_SLIT0, 0, { .d_c = 0 }}})), _SLIT("blue"));
	string mbuiltin = _SLIT("builtin");
	for (int _t1 = 0; _t1 < graph->nodes.len; ++_t1) {
		v__depgraph__DepGraphNode node = ((v__depgraph__DepGraphNode*)graph->nodes.data)[_t1];
		bool is_main = string__eq(node.name, _SLIT("main"));
		v__dotgraph__DotGraph_new_node(dg, node.name, (v__dotgraph__NewNodeConfig){.node_name = (string){.str=(byteptr)"", .is_lit=1},.should_highlight = is_main,.tooltip = (string){.str=(byteptr)"", .is_lit=1},.ctx = ((voidptr)(0)),.name2node_fn = �
Array_string deps = array_clone_to_depth(&node.deps, 0);
		if (!string__eq(node.name, mbuiltin) && !Array_string_contains(deps, mbuiltin)) {
			array_push((array*)&deps, _MOV((string[]){ string_clone(mbuiltin) }));
		}
		for (int _t3 = 0; _t3 < deps.len; ++_t3) {
			string dep = ((string*)deps.data)[_t3];
			v__dotgraph__DotGraph_new_edge(dg, node.name, dep, (v__dotgraph__NewEdgeConfig){.should_highlight = is_main,.ctx = ((voidptr)(0)),.name2node_fn = cfg
                }
	}
	v__dotgraph__DotGraph_finish(dg);

I would expect the compiler to correctly compile.

[medvednikov]

Fixed. v self compiles with this line added.

[yuyi98]

It is still failed when execute v self again, the problem maybe in sym.info.fields.