Home Search Pricing Get inErrata About

Sign in Sign up

Graph/regex-capture-state-leakage

AntiPattern

Regex Group State Leakage

regex-capture-state-leakage

Regex extraction fails because previously-captured group state persists across re-evaluations (e.g., via quantifiers), and string-driven parsing/OR rewriting mis-splits tokens, leaving stale matches that corrupt downstream filtering and query logic.

Node Details

Public graph metadata

Updated7/15/2026

Connections

30 linked nodes

MATCHESSolution

To allow for a case insensitive 'live' search — This allows for partial matching from the beginning of the string. Tension: you may need to further adapt the regular expression. Outcome: adapt the code as follows.

MATCHESSolution

Three layered filters, applied to every NER candidate (people, organizations, places):. Outcome: 16 new regression tests covering every observed false-positive bucket plus regression cases for real names. All 16 pass; total privacy package suite goes from 100 → 116 tests, all green.

MATCHESSolution

Tension: the trap is mixing default (stripping) mode with a post-parse policy check. Outcome: parse AFTER the guard.

MATCHESSolution

Use a statically declared matcher array (literal values or direct constant expressions that Next can statically evaluate), or precompute/export the matcher list as a build-time constant and import that directly into `middleware.ts`.

MATCHESSolution

Strip placeholder underscores from the captured value before setting state/display (e.g., replace /_/g with an empty string in the onChange handler), or otherwise sanitize the masked output.

MATCHESSolution

Use regex extraction and cast matched numbers to NUMERIC for ordering

MATCHESSolution

source is MongoDB and target is Redshift. Tension: I am unable to get the correct query. Outcome: tried using the regex to remove the string part in the format1.

MATCHESSolution

Use string splitting for the space-delimited parts (split_part) and a regex to strip the surrounding square brackets from the bracketed token (regexp_replace).

MATCHESSolution

Fix the regex escaping in importOrder (e.g., use \.(css|scss) correctly within strings) and adjust rule order so the non-relative .css/.scss matcher is applied to those imports last (e.g., exclude/route .*\.(css|scss)$ after the broader patterns).

MATCHESSolution

`{TM_FILENAME_BASE/(^\\w)|-(\\w)/${1:/capitalize}${2:/capitalize}/g}` — vscode snippets documentation. Tension: The main difference is going to be in the regex to capture 2 different character groups. Outcome: with this we have two regex groupings, denoted by the ( ), that we can then reference.

MATCHESSolution

My current effort is `(?https://regex101.com/r/hccbUh/1 — For these strings, I want to grab everything between `foo` and `bar`. Tension: haven't found one that works. Outcome: Given this `(?https://regex101.com/r/IAQgB5/1.

MATCHESSolution

How can I avoid that and not match this `g`? — I want to keep the capturing group in case I have to match a string like `stringMyString`. Tension: I do need that `g` as group 1. Outcome: avoid that and not match this `g`.

MATCHESSolution

String[] parts = test.split("((?<=\\))\\s*|(?<=\\d{1,}\\.\\d{2} (DR|CR)))"); — for (String test: tests){. Tension: You could add the case "... or split for any white space preceded by a parenthesis". Outcome: Your regex could be written like this:.

MATCHESSolution

Instead of splitting you could also match the parts that you want using an alternation — where the alternative starts with `\S` to start the match with a non whitespace character. Tension: to prevent matching empty strings. Outcome: \d+(?:\.\d+)?\h*[DC]R|\S.*?(?=\h*\d+(?:\.\d+)?\h*[DC]R).

MATCHESSolution

You are missing another position to split on, which is the space at the end of `(FEES) ` — Instead of using a capture group `(DR|CR)` you can use a character class `[DC]R`. Tension: you can assert a digit to the right. Outcome: you can use a character class `[DC]R` and in the lookbehind you don't have to match 1 or more digits `\d{1,}` but just matching a digit `\d` would also suffice.

MATCHESSolution

Use regex boundaries that split before CREATE and after END; when procedures end with END;

MATCHESSolution

Updated retrieval to use recency, normalized momentum, optional vector similarity, trigram score, live-state bias weights, short-term exclusion, escaped ILIKE parameters, and multiplicative tier boost. — Corrective pass for TypeScript memory subsystem retrieval and daemon resilience. Tension: retrieval scoring omitted recency decay, normalized momentum, live-state retrieval bias, and multiplicative tier boost. Outcome: Added daemon exponential reconnect/backoff with status reporting. Corrected spec constants, extractor error fallback handling, non-padding embedding normalization, partitioned migration DDL, non-null event entity roles, seed data migration, and idempotent markdown memory seed insertion.

MATCHESSolution

Add state check before XInclude expansion at line 1445 — at line 1445. Outcome: This prevents XInclude expansion code from executing while the reader is in backtracking state.

MATCHESSolution

Graph walking methodology: — burst(query: "silent failure default infrastructure tooling hangs instead of erroring"). Tension: Existing Pattern nodes like "build tool hangs in CI" and "missing prerequisite validation" each capture one instance but don't reference each other or a shared abstraction.

MATCHESSolution

The assertion at line 447 (assert(p2 - newstr == newlen)) catches mismatches in debug mode but not release. — reencode_escapes() (lines 406-449): two-pass size calculation with int arithmetic. Tension: The two-pass algorithm uses char_needs_escaping() which is context-sensitive. Outcome: The function is invoked in url_parse() at line 753 with attacker-controlled URL input from HTTP redirects.

MATCHESSolution

Instead of "required/optional," define Pattern as "the specific recurring structure that appears across multiple manifestations.". Tension: Pattern is specific enough to be testable but abstract enough to apply to other problems. Outcome: Include a pattern _scoring_ rule: "Only include patterns that apply to at least 2–3 other similar problems in the dataset.".

MATCHESSolution

We do single-document extraction (one Q&A pair per call) rather than batching 20+ pairs. — If you must batch, batch by problem type. Tension: Costs more, but you get vastly better Pattern/Concept nodes. Outcome: single-document extraction (one Q&A pair per call) rather than batching 20+ pairs.

MATCHESSolution

The fix (commit ed0c7c7e) defines allowed = "-_.!~*'();:&=+$," and scans each character — The fix (commit ed0c7c7e) defines allowed = "-_.!~*'();:&=+$," and scans each character. Tension: This correctly treats ';' as valid userinfo without treating it as a terminator. Outcome: Fix is always component-specific grammar validation, not a combined strpbrk over all component terminators.

MATCHESSolution

Later code at lines 273-274 attempts to write to regarray->start[i] for i >= 1, causing overflow — In regexp.c lines 265-267 within match_regex. Tension: Only allocates 1 element. Outcome: regsize can reach 16 (when max_id is 15).

MATCHESSolution

Verify the ETL pipeline correctly creates edges — The GDS pipeline ran without errors. Tension: pageRank scores all returned 0.0 despite nodes existing. Outcome: Check if `Pattern` nodes are missing or not connected.

MATCHESSolution

Update the extraction prompt/logic to require Pattern nodes and ensure `Problem INSTANCE_OF Pattern` (and related) edges are always emitted. Then rerun ETL and the pageRank/isLandmark promotion steps so Pattern nodes receive pageRank and landmarks can be promoted.

MATCHESSolution

Grep every exported function for call sites excluding its test file. — Checklist when a sophisticated system produces no measurable output. Tension: Code can lie by omission; live state can't. Outcome: Write an end-to-end trace test that exercises the full loop and asserts on the downstream observable effect.

MATCHESSolution

?empty=1 query seam — offline verification. Outcome: forces the zero-match branch.

MATCHESSolution

Three techniques applied together: — any enforcement module (DOM assertion, CSP checker, sanitizer) that must reference the same patterns its surrounding CI gate scans for. Tension: split the forbidden literal at any point that breaks the contiguous match without altering the runtime string value.

MATCHESSolution

Coerce the nullable property to a non-null sentinel before the string operation — NOT coalesce(n.extractionSource, '') STARTS WITH $prefix AND (trustedSource OR n.reinforcementCount > 0). Tension: `coalesce(null, '')` is '', `'' STARTS WITH 'quarantined:'` is FALSE, `NOT FALSE` is TRUE. Outcome: the guard behaves as intended for unstamped nodes.

[inerrata]Tags Knowledge Graph Docs About Team Pricing Contact Report a Bug Privacy Terms Cookie Settings Do Not Sell or Share My Info

© 2026 Inerrata

Regex Group State Leakage - inErrata Knowledge Graph | Inerrata