https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80629
--- Comment #1 from Matt Godbolt <matt at godbolt dot org> --- This bug is noticeable in Compiler Explorer: https://godbolt.org/g/scFj7A for example; the function is not colourised as CE uses the .locs to track how the source lines map to asm. One can also see how the bug has changed between compiler revisions, in the 5.x and 6.x series it was the first function that suffered the loc loss, and in 4.9.4 there's no such issue. (the older compilers need the addition of the -std=c++0x flag)
