`cmp` function is borken in javascript

[treeform]

so in js this is wrong:

cmp("foo", "foo") = 0
cmp("foo_bar", "foo") = 95
cmp("foo", "foo_bar") = 0

It does not check when you go over the length of the string if the first string is smaller.

Nim/lib/system/jssys.nim

Line 415 in 85b00af

proc cmpStrings(a, b: string): int {.asmNoStackFrame, compilerProc.} =