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[compiler] Phase 1: Add error accumulation infrastructure to Environment (#35873)
Add error accumulation methods to the Environment class: - #errors field to accumulate CompilerErrors across passes - recordError() to record a single diagnostic (throws if Invariant) - recordErrors() to record all diagnostics from a CompilerError - hasErrors() to check if any errors have been recorded - aggregateErrors() to retrieve the accumulated CompilerError - tryRecord() to wrap callbacks and catch CompilerErrors --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35873). * #35888 * #35884 * #35883 * #35882 * #35881 * #35880 * #35879 * #35878 * #35877 * #35876 * #35875 * #35874 * __->__ #35873
Joseph Savona committed
Feb 23, 2026 at 15:18 UTC
eca778cf8bf88b2a62a5244f94a0084593ffbf14
2 files changed
+83
-3
compiler/fault-tolerance-overview.md
+2
-2
@@ -31,7 +31,7 @@ Note that some errors may continue to cause an eager bailout:
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Add error accumulation to the `Environment` class so that any pass can record errors during compilation without halting.
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-- [ ] **1.1 Add error accumulator to Environment** (`src/HIR/Environment.ts`)
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+- [x] **1.1 Add error accumulator to Environment** (`src/HIR/Environment.ts`)
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- Add a `#errors: CompilerError` field, initialized in the constructor
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- Add a `recordError(error: CompilerDiagnostic | CompilerErrorDetail)` method that:
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- If an Invariant-category detail, immediately throw it
@@ -41,7 +41,7 @@ Add error accumulation to the `Environment` class so that any pass can record er
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- Add a `aggregateErrors(): CompilerError` method that returns the accumulated error object
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- Consider whether `recordError` should accept the same options as `CompilerError.push()` for convenience (reason, description, severity, loc, etc.)
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-- [ ] **1.2 Add a `tryRecord` helper on Environment** (`src/HIR/Environment.ts`)
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+- [x] **1.2 Add a `tryRecord` helper on Environment** (`src/HIR/Environment.ts`)
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- Add a `tryRecord(fn: () => void): void` method that wraps a callback in try/catch:
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- If `fn` throws a `CompilerError` that is NOT an invariant, record it via `recordError`
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- If `fn` throws a non-CompilerError or a CompilerError invariant, re-throw
compiler/packages/babel-plugin-react-compiler/src/HIR/Environment.ts
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@@ -8,7 +8,12 @@
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import * as t from '@babel/types';
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import {ZodError, z} from 'zod/v4';
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import {fromZodError} from 'zod-validation-error/v4';
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-import {CompilerError} from '../CompilerError';
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+import {
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+ CompilerDiagnostic,
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+ CompilerError,
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+ CompilerErrorDetail,
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+ ErrorCategory,
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+} from '../CompilerError';
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import {CompilerOutputMode, Logger, ProgramContext} from '../Entrypoint';
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import {Err, Ok, Result} from '../Utils/Result';
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import {
@@ -545,6 +550,12 @@ export class Environment {
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#flowTypeEnvironment: FlowTypeEnv | null;
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+ /**
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+ * Accumulated compilation errors. Passes record errors here instead of
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+ * throwing, so the pipeline can continue and report all errors at once.
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+ */
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+ #errors: CompilerError = new CompilerError();
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+
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constructor(
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scope: BabelScope,
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fnType: ReactFunctionType,
@@ -702,6 +713,75 @@ export class Environment {
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}
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}
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+ /**
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+ * Record a single diagnostic or error detail on this environment.
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+ * If the error is an Invariant, it is immediately thrown since invariants
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+ * represent internal bugs that cannot be recovered from.
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+ * Otherwise, the error is accumulated and optionally logged.
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+ */
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+ recordError(error: CompilerDiagnostic | CompilerErrorDetail): void {
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+ if (error.category === ErrorCategory.Invariant) {
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+ const compilerError = new CompilerError();
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+ if (error instanceof CompilerDiagnostic) {
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+ compilerError.pushDiagnostic(error);
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+ } else {
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+ compilerError.pushErrorDetail(error);
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+ }
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+ throw compilerError;
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+ }
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+ if (error instanceof CompilerDiagnostic) {
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+ this.#errors.pushDiagnostic(error);
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+ } else {
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+ this.#errors.pushErrorDetail(error);
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+ }
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+ }
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+
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+ /**
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+ * Record all diagnostics from a CompilerError onto this environment.
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+ */
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+ recordErrors(error: CompilerError): void {
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+ for (const detail of error.details) {
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+ this.recordError(detail);
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+ }
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+ }
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+
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+ /**
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+ * Returns true if any errors have been recorded during compilation.
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+ */
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+ hasErrors(): boolean {
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+ return this.#errors.hasAnyErrors();
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+ }
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+
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+ /**
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+ * Returns the accumulated CompilerError containing all recorded diagnostics.
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+ */
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+ aggregateErrors(): CompilerError {
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+ return this.#errors;
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+ }
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+
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+ /**
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+ * Wraps a callback in try/catch: if the callback throws a CompilerError
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+ * that is NOT an invariant, the error is recorded and execution continues.
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+ * Non-CompilerError exceptions and invariants are re-thrown.
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+ */
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+ tryRecord(fn: () => void): void {
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+ try {
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+ fn();
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+ } catch (err) {
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+ if (err instanceof CompilerError) {
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+ // Check if any detail is an invariant — if so, re-throw
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+ for (const detail of err.details) {
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+ if (detail.category === ErrorCategory.Invariant) {
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+ throw err;
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+ }
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+ }
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+ this.recordErrors(err);
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+ } else {
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+ throw err;
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+ }
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+ }
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+ }
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+
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isContextIdentifier(node: t.Identifier): boolean {
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return this.#contextIdentifiers.has(node);
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}