ObjectMapper.readValue() from java.io.File fails to parse single quoted string (json5)

[wcarmon]

Describe the bug
com.fasterxml.jackson.databind.ObjectMapper.readValue drops double quotes when parsing *.json5 file.
(specifically, when parsing a single quoted string value)

Version information
2.12.4

To Reproduce

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.json.JsonReadFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.json.JsonMapper;
import java.nio.file.Files;
import java.nio.file.Path;
import static java.nio.charset.StandardCharsets.UTF_8;

public class Foo {

  @JsonProperty("bar")
  String bar;

  public Foo() {
  }

  public static void main(String[] args) throws Exception {
    ObjectMapper objectMapper = JsonMapper.builder()
        .enable(JsonParser.Feature.ALLOW_SINGLE_QUOTES)
        .enable(JsonReadFeature.ALLOW_SINGLE_QUOTES)
        .build();

    final String json = "{ \"bar\": '\"\"'}";    // <--- single quoted string here (json5)

    // -- Write the same json to file
    Path tempFile = Files.createTempFile("foo", ".json5");
    Files.write(tempFile, json.getBytes(UTF_8));

    // Succeeds when reading from string
    Foo success = objectMapper.readValue(
        json,
        Foo.class);

    // Bug: Parses incorrectly when reading from file
    Foo failure = objectMapper.readValue(
        tempFile.toFile(),   // <--- this is the difference
        Foo.class);

    System.out.println("success: " + success.bar);  // prints both
    System.out.println("failure: " + failure.bar);  // prints only one "   <--- BUG symptom
  }
}

Expected behavior
Expected both double quotes to be parsed from *.json5 file

(Works correctly when parsing string, fails when parsing *.json5 file)

Additional context

• oracle jvm 11
• same issue happens in kotlin

[cowtowncoder]

Hmmmh. That is unexpected... I suspect it might not necessarily be due to File but use of byte-backed source. Will play with this.

Thank you for reporting this issue!

[cowtowncoder]

Created FasterXML/jackson-core#721 and I can reproduce this with byte-backed source (and DataInput it seems)

[cowtowncoder]

So; fix will be in 2.13.1 (or, if I ever do 2.12.6).

In the meantime one way to work around this would be to force use of Reader internally; this is possible by explicitly constructing InputStreamReader on FileInputStream.
Writing is not related to the issue.