Trouble passing "true", "false" and "null" #585
Description
Some values can't be passed directly to a function.
I was trying to pass true as the first argument to a function, but it got turned into undefined. From what I've seen this happens with false and null as well.
Check the below example and its output (from running ./v7 file.js), written in the comments:
'use strict'
function fn(a, b) { print("a: " + a + ", b: " + b) }
fn(3, 2) // a: 3, b: 2
fn(true) // a: undefined, b: undefined
fn(true, true) // a: true, b: undefined
fn(true, "foo") // a: true, b: foo
If instead you put the true value in a variable and pass it through that variable, everything works well.
print('-- from a variable')
var trueVar = true
fn(trueVar) // a: true, b: undefined
fn(trueVar, trueVar) // a: true, b: true
fn(trueVar, "foo") // a: true, b: foo
Everything works if true is generated from any expression as well.
I compiled the latest master (as of today) of v7 with the following command:
gcc -O0 -DV7_EXE -DV7_ENABLE_STACK_TRACKING -DV7_ENABLE_FILE v7.c -lm
But even when keeping only -DV7_EXE I can still reproduce this issue.