v panic debug information

vlib/builtin/builtin.v

@@ -26,6 +26,19 @@ pub fn print_backtrace() {
 	}
 }
 
+// replaces panic when -debug arg is passed
+fn _panic_debug(line_no int, file,  mod, fn_name, s string) {
+	println('================ V panic ================')
+	println('   module: $mod')
+	println(' function: ${fn_name}()')
+	println('     file: $file')
+	println('     line: ' + line_no.str())
+	println('  message: $s')
+	println('=========================================')
+	print_backtrace()
+	C.exit(1)
+}
+
 pub fn panic(s string) {
 	println('V panic: $s')
 	print_backtrace()