TLS error handling broken about curlsharp HOT 1 OPEN

Connected to www.coinexchange.io (5.254.66.11) port 443 (#0)
ALPN, offering http/1.1
Cipher selection: ALL
successfully set certificate verify locations:
  CAfile: curl-ca-bundle.crt
  CApath: none
SslDataOut: 5 bytes data
TLSv1.2 (OUT), TLS handshake, Client hello (1):
SslDataOut: 512 bytes data
SslDataIn: 5 bytes data
TLSv1.2 (IN), TLS handshake, Server hello (2):
SslDataIn: 104 bytes data
SslDataIn: 5 bytes data
TLSv1.2 (IN), TLS handshake, Certificate (11):
SslDataIn: 4330 bytes data
SslDataIn: 5 bytes data
TLSv1.2 (IN), TLS handshake, Server key exchange (12):
SslDataIn: 333 bytes data
SslDataIn: 5 bytes data
TLSv1.2 (IN), TLS handshake, Server finished (14):
SslDataIn: 4 bytes data
SslDataOut: 5 bytes data
TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
SslDataOut: 70 bytes data
SslDataOut: 5 bytes data
TLSv1.2 (OUT), TLS change cipher, Client hello (1):
SslDataOut: 1 bytes data
SslDataOut: 5 bytes data
TLSv1.2 (OUT), TLS handshake, Finished (20):
SslDataOut: 16 bytes data
SslDataIn: 5 bytes data
SslDataIn: 5 bytes data
TLSv1.2 (IN), TLS handshake, Finished (20):
SslDataIn: 16 bytes data
SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
ALPN, server accepted to use http/1.1
Server certificate:
 subject: OU=Domain Control Validated; OU=PositiveSSL; CN=coinexchange.io
 start date: Mar  3 00:00:00 2017 GMT
 expire date: Mar  5 23:59:59 2019 GMT
 subjectAltName: host "www.coinexchange.io" matched cert's "www.coinexchange.io"
 issuer: C=GB; ST=Greater Manchester; L=Salford; O=COMODO CA Limited; CN=COMODO
RSA Domain Validation Secure Server CA
 SSL certificate verify ok.
SslDataOut: 5 bytes data
HeaderOut: 75 bytes data
SslDataIn: 5 bytes data
TLSv1.2 (IN), TLS alert, Client hello (1):
SslDataIn: 2 bytes data
Curl_http_done: called premature == 0
Empty reply from server
Connection #0 to host www.coinexchange.io left intact

* ALPN, offering http/1.1
* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
*   CAfile: C:/Program Files/Git/mingw64/ssl/certs/ca-bundle.crt
  CApath: none
* TLSv1.2 (OUT), TLS header, Certificate Status (22):
} [5 bytes data]
* TLSv1.2 (OUT), TLS handshake, Client hello (1):
} [512 bytes data]
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0* TLSv1.2 (IN), TLS handshake, Server hello (2):
{ [109 bytes data]
* TLSv1.2 (IN), TLS handshake, Certificate (11):
{ [4330 bytes data]
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
{ [333 bytes data]
* TLSv1.2 (IN), TLS handshake, Server finished (14):
{ [4 bytes data]
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
} [70 bytes data]
* TLSv1.2 (OUT), TLS change cipher, Client hello (1):
} [1 bytes data]
* TLSv1.2 (OUT), TLS handshake, Finished (20):
} [16 bytes data]
* TLSv1.2 (IN), TLS change cipher, Client hello (1):
{ [1 bytes data]
* TLSv1.2 (IN), TLS handshake, Finished (20):
{ [16 bytes data]
* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
* ALPN, server accepted to use http/1.1
* Server certificate:
*        subject: OU=Domain Control Validated; OU=PositiveSSL; CN=coinexchange.io
*        start date: Mar  3 00:00:00 2017 GMT
*        expire date: Mar  5 23:59:59 2019 GMT
*        subjectAltName: www.coinexchange.io matched
*        issuer: C=GB; ST=Greater Manchester; L=Salford; O=COMODO CA Limited; CN=COMODO RSA Domain Validation Secure Server CA
*        SSL certificate verify ok.
} [5 bytes data]
> GET /api/v1/getmarkets HTTP/1.1
> Host: www.coinexchange.io
> User-Agent: curl/7.46.0
> Accept: */*
>
{ [5 bytes data]
< HTTP/1.1 200 OK
< Server: PipeGuard
< Date: Wed, 08 Mar 2017 13:11:55 GMT
< Content-Type: application/json
< Transfer-Encoding: chunked
< Connection: keep-alive
< Vary: Accept-Encoding
< Cache-Control: no-cache
< Pragma: public
< Cache-Control: public, must-revalidate, proxy-revalidate
<
{ [16103 bytes data]
100 50483    0 50483    0     0  95250      0 --:--:-- --:--:-- --:--:--  102k
* Connection #0 to host www.coinexchange.io left intact