Change:
Describe what you were doing when the bug occurred: back to go back through the frames following a profile session. I think I got to zero and then clicked it again and then it errored Please do not remove the text below this line DevTools version: 4.8.2- Call stack: at getCommitTree (chrome-) at getCommitTree (chrome-) at getCommitTree (chrome-) at getCommitTree (chrome-) at getCommitTree (chrome-) at getCommitTree (chrome-) at getCommitTree (chrome-) at getCommitTree (chrome-) at getCommitTree (chrome-) at getCommitTree (chrome-) Component stack: at CommitRankedAutoSizer (chrome-) at div at div at div at SettingsModalContextController (chrome-) at ProfilerProfiler (chrome-) at ErrorBoundary (chrome-) at PortaledContent (chrome-) at div at div at ProfilerContextController (chrome-) at TreeContextController (chrome-) at SettingsContextController (chrome-) at ModalDialogContextController (chrome-) at DevToolsDevTools (chrome-)
Please how do I replicate this? I don't seem to be able to replicate it.
sorry, I won't have time to create a mre. I was doing a recording on a site with a lot of components and a lot of frames in the recording. I ended up going to maybe frame 30 then clicking back rapidly to get back to 0 and I guess went to far or something. Feel free to close this, I thought that the logs might be enough and it was encouraging me to submit the issue.
Can I have a look ?
Maybe change this recursive function And use a loop going to correct the issue. If it is ok, i can work on it.
can you share how you were able to replicate the issue?
I think for there to be a stack overflow from calling itself, it would need to have profiling data with thousands (?) of commits. This function only recurses (at most) once per commit when processing data, and then, too, only if you jump through commits you haven't yet processed (so 0 -N would recurse N times). That being said, it seems like we could also rewrite this function to be iterative without too much trouble. Done in PR !
That's quite possible actually. The issue I was trying to diagnose was high CPU usage on an app that has spreadsheet like functionality, i.e. lots of components so I was trying to see exactly what was taking all the CPU time. Thanks for the PR. Hopefully next time this crops up it will solve it.
Great Should be released sometime in the next few days.

Discussion:
const commitTrees = ((rootToCommitTreeMap.get( rootID, ): any): Array<CommitTree>); if (commitIndex < commitTrees.length) { return commitTrees[commitIndex]; }

} const {operations} = dataForRoot; <ins> if (operations.length <= commitIndex) { throw Error( `getCommitTree(): Invalid commit "${commitIndex}" for root "${rootID}". There are only "${operations.length}" commits.`, ); } </ins> <del> // Commits are generated sequentially and cached. // If this is the very first commit, start with the cached snapshot and apply the first mutation. // Otherwise load (or generate) the previous commit and append a mutation to it. if (commitIndex === 0) { const nodes = new Map(); // Construct the initial tree. recursivelyInitializeTree(rootID, 0, nodes, dataForRoot); </del> <ins> let commitTree: CommitTree = ((null: any): CommitTree); for (let index = commitTrees.length; index <= commitIndex; index++) { // Commits are generated sequentially and cached. // If this is the very first commit, start with the cached snapshot and apply the first mutation. // Otherwise load (or generate) the previous commit and append a mutation to it. if (index === 0) { const nodes = new Map(); </ins> <del> // Mutate the tree if (operations != null && commitIndex < operations.length) { const commitTree = updateTree({nodes, rootID}, operations[commitIndex]); </del> <ins> // Construct the initial tree. recursivelyInitializeTree(rootID, 0, nodes, dataForRoot); </ins> <del> if (__DEBUG__) { __printTree(commitTree); } </del> <ins> // Mutate the tree if (operations != null && index < operations.length) { commitTree = updateTree({nodes, rootID}, operations[index]); </ins> <del> commitTrees.push(commitTree); return commitTree; } } else { const previousCommitTree = getCommitTree({ commitIndex: commitIndex - 1, profilerStore, rootID, }); </del> <ins> if (__DEBUG__) { __printTree(commitTree); } </ins> <del> if (operations != null && commitIndex < operations.length) { const commitTree = updateTree( previousCommitTree, operations[commitIndex], ); </del> <ins> commitTrees.push(commitTree); } } else { const previousCommitTree = commitTrees[index - 1]; commitTree = updateTree(previousCommitTree, operations[index]); </ins> if (__DEBUG__) { __printTree(commitTree); } commitTrees.push(commitTree); <del> return commitTree; </del> } } <del> throw Error( `getCommitTree(): Unable to reconstruct tree for root "${rootID}" and commit "${commitIndex}"`, ); </del> <ins> return commitTree; </ins> } function recursivelyInitializeTree(