fix: c benchmark

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: missing_dependencies
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: DhruvArvindSingh

lib/node_modules/@stdlib/blas/base/drotg/benchmark/c/benchmark.length.c

@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2026 The Stdlib Authors.
+* Copyright (c) 2025 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -97,11 +97,17 @@ static double rand_double( void ) {
 static double benchmark1( int iterations, int len ) {
 	double elapsed;
 	double out[ 4 ];
-	double a[ len ];
-	double b[ len ];
+	double *a;
+	double *b;
 	double t;
 	int i;
 
+	a = (double *)malloc( len * sizeof( double ) );
+	b = (double *)malloc( len * sizeof( double ) );
+	if ( a == NULL || b == NULL ) {
+		printf( "Error: failed to allocate memory\n" );
+		return -1.0;
+	}
 	for ( i = 0; i < len; i++ ) {
 		a[ i ] = ( rand_double() * 200.0 ) - 100.0;
 		b[ i ] = ( rand_double() * 200.0 ) - 100.0;
@@ -118,6 +124,8 @@ static double benchmark1( int iterations, int len ) {
 	if ( out[ 0 ] != out[ 0 ] ) {
 		printf( "should not return NaN\n" );
 	}
+	free( a );
+	free( b );
 	return elapsed;
 }
 
@@ -131,11 +139,17 @@ static double benchmark1( int iterations, int len ) {
 static double benchmark2( int iterations, int len ) {
 	double elapsed;
 	double out[ 4 ];
-	double a[ len ];
-	double b[ len ];
+	double *a;
+	double *b;
 	double t;
 	int i;
 
+	a = (double *)malloc( len * sizeof( double ) );
+	b = (double *)malloc( len * sizeof( double ) );
+	if ( a == NULL || b == NULL ) {
+		printf( "Error: failed to allocate memory\n" );
+		return -1.0;
+	}
 	for ( i = 0; i < len; i++ ) {
 		a[ i ] = ( rand_double() * 200.0 ) - 100.0;
 		b[ i ] = ( rand_double() * 200.0 ) - 100.0;
@@ -152,6 +166,8 @@ static double benchmark2( int iterations, int len ) {
 	if ( out[ 0 ] != out[ 0 ] ) {
 		printf( "should not return NaN\n" );
 	}
+	free( a );
+	free( b );
 	return elapsed;
 }
 
@@ -178,13 +194,21 @@ int main( void ) {
 			count += 1;
 			printf( "# c::%s:len=%d\n", NAME, len );
 			elapsed = benchmark1( iter, len );
+			if ( elapsed < 0.0 ) {
+				printf( "not ok %d benchmark failed\n", count );
+				continue;
+			}
 			print_results( iter, elapsed );
 			printf( "ok %d benchmark finished\n", count );
 		}
 		for ( j = 0; j < REPEATS; j++ ) {
 			count += 1;
 			printf( "# c::%s:assign:len=%d\n", NAME, len );
 			elapsed = benchmark2( iter, len );
+			if ( elapsed < 0.0 ) {
+				printf( "not ok %d benchmark failed\n", count );
+				continue;
+			}
 			print_results( iter, elapsed );
 			printf( "ok %d benchmark finished\n", count );
 		}