diff --git a/src/Psalm/Internal/Codebase/Analyzer.php b/src/Psalm/Internal/Codebase/Analyzer.php
index afd8b6b272e..6921b8b3af7 100644
--- a/src/Psalm/Internal/Codebase/Analyzer.php
+++ b/src/Psalm/Internal/Codebase/Analyzer.php
@@ -511,10 +511,6 @@ static function (): void {
                     $this->argument_map[$file_path] = $argument_map;
                 }
             }
-
-            if ($pool->didHaveError()) {
-                exit(1);
-            }
         } else {
             $i = 0;
 
diff --git a/src/Psalm/Internal/Codebase/Scanner.php b/src/Psalm/Internal/Codebase/Scanner.php
index c30d6c5a022..40baaa33d14 100644
--- a/src/Psalm/Internal/Codebase/Scanner.php
+++ b/src/Psalm/Internal/Codebase/Scanner.php
@@ -417,10 +417,6 @@ function () {
                     );
                 }
             }
-
-            if ($pool->didHaveError()) {
-                exit(1);
-            }
         } else {
             $i = 0;
 
diff --git a/src/Psalm/Internal/Fork/Pool.php b/src/Psalm/Internal/Fork/Pool.php
index 08a972ede7d..9d00a104993 100644
--- a/src/Psalm/Internal/Fork/Pool.php
+++ b/src/Psalm/Internal/Fork/Pool.php
@@ -80,8 +80,6 @@ final class Pool
     /** @var resource[] */
     private array $read_streams = [];
 
-    private bool $did_have_error = false;
-
     /** @var ?Closure(mixed): void */
     private ?Closure $task_done_closure = null;
 
@@ -297,6 +295,20 @@ private static function streamForChild(array $sockets)
         return $for_write;
     }
 
+    private function killAllChildren(): void
+    {
+        foreach ($this->child_pid_list as $child_pid) {
+            /**
+             * SIGTERM does not exist on windows
+             *
+             * @psalm-suppress UnusedPsalmSuppress
+             * @psalm-suppress UndefinedConstant
+             * @psalm-suppress MixedArgument
+             */
+            posix_kill($child_pid, SIGTERM);
+        }
+    }
+
     /**
      * Read the results that each child process has serialized on their write streams.
      * The results are returned in an array, one for each worker. The order of the results
@@ -319,6 +331,7 @@ private function readResultsFromChildren(): array
         $content = array_fill_keys(array_keys($streams), '');
 
         $terminationMessages = [];
+        $done = [];
 
         // Read the data off of all the stream.
         while (count($streams) > 0) {
@@ -361,34 +374,25 @@ private function readResultsFromChildren(): array
                         if ($message instanceof ForkProcessDoneMessage) {
                             $terminationMessages[] = $message->data;
                         } elseif ($message instanceof ForkTaskDoneMessage) {
+                            $done[(int)$file] = true;
                             if ($this->task_done_closure !== null) {
                                 ($this->task_done_closure)($message->data);
                             }
                         } elseif ($message instanceof ForkProcessErrorMessage) {
-                            // Kill all children
-                            foreach ($this->child_pid_list as $child_pid) {
-                                /**
-                                 * SIGTERM does not exist on windows
-                                 *
-                                 * @psalm-suppress UnusedPsalmSuppress
-                                 * @psalm-suppress UndefinedConstant
-                                 * @psalm-suppress MixedArgument
-                                 */
-                                posix_kill($child_pid, SIGTERM);
-                            }
+                            $this->killAllChildren();
                             throw new Exception($message->message);
                         } else {
-                            error_log('Child should return ForkMessage - response type=' . gettype($message));
-                            $this->did_have_error = true;
+                            $this->killAllChildren();
+                            throw new Exception('Child should return ForkMessage - response type=' . gettype($message));
                         }
                     }
                 }
 
                 // If the stream has closed, stop trying to select on it.
                 if (feof($file)) {
-                    if ($content[(int)$file] !== '') {
-                        error_log('Child did not send full message before closing the connection');
-                        $this->did_have_error = true;
+                    if ($content[(int)$file] !== '' || !isset($done[(int)$file])) {
+                        $this->killAllChildren();
+                        throw new Exception('Child did not send full message before closing the connection');
                     }
 
                     fclose($file);
@@ -450,8 +454,8 @@ public function wait(): array
                      * @psalm-suppress UndefinedConstant
                      */
                     if ($term_sig !== SIGALRM) {
-                        $this->did_have_error = true;
-                        error_log("Child terminated with return code $return_code and signal $term_sig");
+                        $this->killAllChildren();
+                        throw new Exception("Child terminated with return code $return_code and signal $term_sig");
                     }
                 }
             }
@@ -459,12 +463,4 @@ public function wait(): array
 
         return $content;
     }
-
-    /**
-     * Returns true if this had an error, e.g. due to memory limits or due to a child process crashing.
-     */
-    public function didHaveError(): bool
-    {
-        return $this->did_have_error;
-    }
 }
diff --git a/src/Psalm/Internal/Fork/PsalmRestarter.php b/src/Psalm/Internal/Fork/PsalmRestarter.php
index 6d1dada4c3a..39927917b06 100644
--- a/src/Psalm/Internal/Fork/PsalmRestarter.php
+++ b/src/Psalm/Internal/Fork/PsalmRestarter.php
@@ -7,6 +7,8 @@
 use function array_filter;
 use function array_merge;
 use function array_splice;
+use function assert;
+use function count;
 use function extension_loaded;
 use function file_get_contents;
 use function file_put_contents;
@@ -125,7 +127,7 @@ private static function toBytes(string $value): int
     /**
      * No type hint to allow xdebug-handler v1 and v2 usage
      *
-     * @param string[] $command
+     * @param non-empty-list<string> $command
      * @phpcsSuppress SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint
      */
     protected function restart($command): void
@@ -167,6 +169,7 @@ protected function restart($command): void
             0,
             $additional_options,
         );
+        assert(count($command) > 1);
 
         parent::restart($command);
     }