Bug 1849336 Comment 0 Edit History

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`SrcNoteType::StepSep` and `SrcNoteType::Breakpoint` are emitted at the same time:

https://searchfox.org/mozilla-central/rev/d81e60336d9f498ad3985491dc17c2b77969ade4/js/src/frontend/BytecodeEmitter.cpp#218,223,227
```cpp
bool BytecodeEmitter::markStepBreakpoint() {
...
  if (!newSrcNote(SrcNoteType::StepSep)) {
...
  if (!newSrcNote(SrcNoteType::Breakpoint)) {
```

and the only consumer of `SrcNoteType::StepSep` is the following, where `SrcNoteType::Breakpoint` is also handled.

https://searchfox.org/mozilla-central/rev/d7a8eadc28298c31381119cbf25c8ba14b8712b3/js/src/vm/BytecodeUtil-inl.h#215-221
```cpp
} else if (type == SrcNoteType::Breakpoint) {
  isBreakpoint = true;
  lastLinePC = snpc;
} else if (type == SrcNoteType::StepSep) {
  seenStepSeparator = true;
  lastLinePC = snpc;
}
```

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